SiUS04-921 Service Manual / Inverter Pair Wall Mounted Type H-Series Inverter Pair Wall Mounted Type H-Series AMERICAS 1645 Wallace Drive, Suite 110 Carrollton, TX75006 info@daikinac.com www.daikinac.com SiUS04-921 Printed in U.S.A. 05/2009 B AK SiUS04-921 Specifications, designs and other content appearing in this brochure are current as of May 2009 but subject to change without notice.
SiUS04-921 Inverter Pair Wall Mounted Type H-Series Heat Pump Indoor Units FTXG09HVJU FTXG12HVJU FTXG15HVJU Outdoor Units RXG09HVJU RXG12HVJU RXG15HVJU 1. SAFETY CONSIDERATIONS............................................................... vi Part 1 List of Functions ................................................................ 1 1. Functions.................................................................................................2 Part 2 Specifications .......................................
SiUS04-921 Part 4 Function and Control........................................................ 11 1. Description of Operation .......................................................................12 1.1 Indoor Unit..............................................................................................12 1.2 Outdoor Unit ...........................................................................................13 2. Main Functions......................................................................
SiUS04-921 Part 5 System Configuration....................................................... 53 1. Installation Manual ................................................................................54 1.1 Indoor Units ............................................................................................54 1.2 Outdoor Units .........................................................................................64 2. System Configuration..............................................................
SiUS04-921 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33 2.34 Compressor Sensor System Abnormality ............................................120 Position Sensor Abnormality ................................................................121 DC Voltage / DC Current Sensor Abnormality .....................................123 Thermistor System Abnormality ...........................................................124 Abnormal Temperature in Electrical Box...........................................
SiUS04-921 2. Outdoor Unit........................................................................................203 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 How to Check the Service Monitor (LED A) .........................................203 Removal of Propeller Fan / Fan Motor .................................................205 Removal of Electrical Box ....................................................................210 Removal of PCB...............................................................
SiUS04-921 Safety Considerations 1. SAFETY CONSIDERATIONS Read these SAFETY CONSIDERATIONS carefully before performing any repair work. Comply with these safety symbols without fail. • If refrigerant gas is discharged during repair work, do not touch the discharged refrigerant gas. The refrigerant gas may cause frostbite. Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols: • Use only pipes, flare nuts, tools, and other materials designed specifically for R410A refrigerant systems.
Safety Considerations leaking into the room. The refrigerant gas itself is harmless, but it may generate toxic gases if it comes into contact with flames. CAUTION • Do not repair the electrical components with wet hands. Working on the equipment with wet hands may cause an electrical shock. • Do not clean the air conditioner by splashing water on it. Washing the unit with water may cause an electrical shock. • Ground the unit when repairing equipment in a humid or wet place to avoid electrical shocks.
SiUS04-921 viii Safety Considerations Safety
SiUS04-921 Part 1 List of Functions 1. Functions.................................................................................................
Functions SiUS04-921 Basic Function Functions Inverter (with Inverter Power Control) Operation Limit for Cooling (°FDB) Operation Limit for Heating (°FWB) Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience PAM Control Energy Saving During Operation Standby Oval Scroll Compressor Swing Compressor Rotary Compressor Reluctance DC Motor Power-Airflow Flap Power-Airflow Dual Flaps Wide-Angle Louvers Vertical Auto-Swing (Up and Down) Horizontal Auto-Swing (Right and Left) 3-D
SiUS04-921 Part 2 Specifications 1. Specifications ..........................................................................................
Specifications SiUS04-921 1. Specifications 60Hz 230V Indoor Units Models FTXG09HVJU RXG09HVJU Outdoor Units Capacity Rated (Min.~Max.) Moisture Removal Running Current (Rated) Power Consumption Rated (Min.~Max.) Power Factor EER (Rated) COP (Rated) Energy SEER/HSPF Efficiency Liquid Piping Connections Gas Drain Heat Insulation Max. Interunit Piping Length Max.
SiUS04-921 Specifications 60Hz 230V Indoor Units Model FTXG15HVJU RXG15HVJU Outdoor Units Capacity Rated (Min.~Max.) Moisture Removal Running Current (Rated) Power Consumption Rated (Min.~Max.) Power Factor EER (Rated) COP (Rated) Energy SEER/HSPF Efficiency Liquid Piping Connections Gas Drain Heat Insulation Max. Interunit Piping Length Max.
Specifications 6 SiUS04-921 Specifications
SiUS04-921 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram....................................8 1.1 Indoor Unit................................................................................................8 1.2 Outdoor Unit ...........................................................................................
Printed Circuit Board Connector Wiring Diagram SiUS04-921 1. Printed Circuit Board Connector Wiring Diagram 1.
SiUS04-921 PCB Detail Printed Circuit Board Connector Wiring Diagram PCB(1): Control PCB JC JB V1 FU1 S46 S32 S48 LED A S21 S43 S52 S51 S41 S1 (R0001) PCB(2): Display PCB JA PCB(3): Signal Receiver / Transmitter PCB S56 S58 SW1 LED2 (R5946) S63 S57 (R10056) PCB(4): Humidity sensor PCB PCB(5): Streamer Unit PCB S402 R2T S401 Humidity sensor CN1 S403 (R5948) (R5947) Printed Circuit Board Connector Wiring Diagram 9
Printed Circuit Board Connector Wiring Diagram 1.2 SiUS04-921 Outdoor Unit Connectors 1) 2) 3) 4) 5) S20 S45 S70 S80 S90 Connector for electronic expansion valve coil Connector for thermal fuse Connector for DC fan motor Connector for four-way valve coil Connector for thermistor (outdoor, heat exchanger, discharge pipe) Note: Other designations 1) 2) 3) 4) 5) PCB Detail FU1, FU2 FU3 V1, V2 LED A LED5 Fuse (3.
SiUS04-921 Part 4 Function and Control 1. Description of Operation .......................................................................12 1.1 Indoor Unit..............................................................................................12 1.2 Outdoor Unit ...........................................................................................13 2. Main Functions......................................................................................14 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.
Description of Operation SiUS04-921 1. Description of Operation 1.1 Indoor Unit (Input) Room temperature thermistor Heat exchanger thermistor Temperature control Transmit signals to outdoor unit to change the frequency of compressor according to the difference of temperature between preset temperature and room temperature. Automatic Humidity sensor Fan speed Switch ON/OFF (test operation switch) Operation mode is automatically selected according to the room condition.
SiUS04-921 1.2 Description of Operation Outdoor Unit (Input) Outdoor unit Discharge pipe thermistor Outdoor air thermistor (Output) Compressor Compressor ON/OFF control Compressor capacity control Four-way valve Frequency control Heat exchanger thermistor 3 min. standby function Fan motor Defrost control OL Switches to cooling cycle and defrosts.
Main Functions SiUS04-921 2. Main Functions 2.1 QUATERNITY Drying Operation Operation Dry Cooling QUATERNITY Drying (R10061) ∗ Refer to the operation manual for details. Features Reheating dehumidifying method is applied. Powerful evaporator eliminates the humidity in your room exclusively. Dry cool air is mixed with warm air from the reheater, thereby blowing in optimal and comfortable dry air.
SiUS04-921 Main Functions Differences on QUANTERNITY drying and "dry cooling" operation Method QUANTERNITY Drying Dry Cooling Puts a pressure reducing device (solenoid valve) in the center of the heat exchanger of indoor unit to separate it into upper and lower side. The upper side acts as a condenser to heat the air.
Main Functions 2.2 SiUS04-921 Comfort Sleep Operation Operation Set the time to wake up. COMFORT SLEEP (R10064) Effective mode for COMFORT SLEEP operation • Cooling • Dry cooling • Heating ∗ Refer to the operation manual for details. Features Outline of function The temperature is controlled in unique V-shape pattern within the range of about 2°C (3.6°F) upper and lower.
SiUS04-921 Main Functions Human sleep Sleep cycle and change in body temperature Body Temperature Temperature shift (˚C/˚F) 9 38/100.4 18 24 2 3 4 5 6 7 37/98.6 36/96.
Main Functions 2.3 SiUS04-921 Automatic Operation Operation AUTO operation (R10068) ∗ Refer to the operation manual for details. Features When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode from cooling and heating according to the room temperature and setting temperature at the time of the operation startup, and automatically operates in that mode.
SiUS04-921 2.4 Main Functions Comfort Airflow Mode Effective mode for comfort airflow mode Operation Comfort Airflow (R10070 • Heating • Auto / Cooling • QUATERNITY drying • Dry cooling Fin motion • Upper and lower fins halt at the fixed position of the upper side or lower side of the swing. • Left and right fins move according to the settings of remote controller. Airflow rate • Airflow rate is at “automatic”. ∗ Refer to the operation manual for details.
Main Functions 2.5 SiUS04-921 Cooling Breeze Operation Operation Cooling breeze (R10071 Note Effective mode for cooling breeze airflow • Auto / Cooling • QUATERNITY drying • Dry cooling • Flash streamer air purifying In automatic mode, when actual operation mode is heating, this cool air fluctuation operation does not work. (Indication on remote controller is shown.
SiUS04-921 2.6 Main Functions Power-airflow Dual Fins Triple airflow by the combination with wide-angle louvers UP/DOWN (AUTOMATIC) COOLING DRY COOLING DRY HEATING AIR PURIFYING (INDIVIDUAL OPERATION) 15° 20° 15° 60° 25° 30° 45° 55° 70° 45 ° 2.7 55° 70° 55° 45 ° RIGHT/LEFT (AUTOMATIC) Wide-angle Fins Wider airflow eliminates uncomfortable irregular temperature distribution.
Main Functions SiUS04-921 It can send the airflow to the center of the room even when the airconditioner is installed in the corner of the room. The curved fins of wide-angle louver heat the center of the room. (R5098) 2.8 3-D Airflow Alternating swing of blades in vertical and horizontal directions circulates the airflow to every corner of the room and prevents uneven temperature distribution. Use of the 3-D airflow control prevents uneven temperature distribution in the whole room.
SiUS04-921 2.9 Main Functions POWERFUL Operation Operation POWERFUL (Can only be used if the unit is running.) (R10073) Effective mode for POWERFUL COOLING • Cooling • Dry cooling Effective mode for POWERFUL HEATING • Heating ∗ Refer to the operation manual for details. Note Features Operating sound becomes slightly louder. It is impossible to change the airflow rate, temperature, and humidity.
Main Functions SiUS04-921 2.11 Multi-colored Indicator Lamp Features Current operation mode is displayed in color of the lamp of the indoor unit. Operating status can be monitored even in automatic operation in accordance with the content of actual operation. Multi-colored indicator lamp (R10074) The lamp color changes according to the operation. HEATING ..................................................Red COOLING .................................................
SiUS04-921 Main Functions 2.13 Information Display Operation INFORMATION (R10076) ∗ Refer to the operation manual for details. Room temperature, indoor humidity, and outdoor temperature are displayed. Point the remote controller at the indoor unit for 2 seconds.
Main Functions SiUS04-921 2.14 Mold-Proof Stick Features Drain pan which prevents mold proliferation The drain pan of the main unit can easily acquire mold so it is equipped with a mold-proof “Stick” providing a mildew-proof, antibacterial, and antivirus effect.
SiUS04-921 Main Functions 2.15 FLASH STREAMER AIR PURIFYING Operation Operation FLASH STREAMER AIR PURIFYING operation (R10078) ∗ Refer to the operation manual for details. FLASH STREAMER AIR PURIFYING The technology for the real air purifier is adopted for the air conditioner. Our original Flash Streamer system technology used for our Daikin air purifiers is incorporated. This technology far exceeds the air purifying performance of a normal air conditioner.
Main Functions SiUS04-921 Mechanism of FLASH STREAMER AIR PURIFYING+ The streamer discharges high energy electrons, analyzes and removes powerful odors, some allergens, viruses, and bacteria such as the MS2 Virus and E. coli Bacteria at the oxidative distraction speed of 1000 times higher than the usual glow discharge.
SiUS04-921 Main Functions Deodorizing Performance of Flash Streamer and Titanium Apatite Photocatalyst Unpleasant odor generating daily in the room such as pet odor or garbage odor is efficiently removed. Speedy deodorization: 90% or more odor has been removed in 10 minutes. Cigarette odor of 80% or more has been removed. Daily odor removal performance by streamer air purifying (%) Persist rate (%) Naturally removed Over 90% removed in approximately 10 min.
Main Functions SiUS04-921 2.17 Filter Cleaning Indicator (Remote Controller) After the unit operates for about 2 weeks (about 340 hours), the filter cleaning indicator alerts you that it is time for maintenance. If the filter is left dirty, the power consumption increases by about 10%. It is recommended to maintain it periodically to ensure energy-saving operation.
SiUS04-921 Main Functions 2.18.2 COUNTDOWN OFF Timer Operation COUNTDOWN OFF timer (R10082) ∗ Refer to the operation manual for details. Features The COUNTDOWN OFF timer sets the time by simple button pressing. The operation is stopped when the set time comes. The time can be set in the unit of 0.5 hour for maximum 9.5 hours. It can be used in combination with the ON timer. 2.18.
Main Functions SiUS04-921 2.20 Table for Special Modes • Transmission normal • Indoor unit [ON/OFF] 5~9 sec. • Transmission abnormal • Indoor unit [ON/OFF] 5~9 sec. A Forced operation mode B Indoor unit demonstration ON • Indoor unit [ON/OFF] • Left for 15 min. Reset OFF Indoor unit Normal mode Normal mode [ON/OFF] Remote controller [CANCEL] 5 sec. C • Remote controller [CANCEL] 5 sec. Diagnosis mode • Left for 60 sec. • Remote controller Remote controller [CLOCK] 5 sec.
SiUS04-921 Main Functions 2.21 Thermostat Control Outline When COOLING or HEATING mode is selected with the remote controller, the microcomputer prevents the unit from turning OFF until the requested room temperature is achieved. Details In the table below you can find the thermostat ON and OFF conditions for a set point of 70°F(21°C). OFF Cooling Heating ON Monitoring Set point 70°F(21°C) --> shift 0.5°C 67.1°F(19.5°C) 69.8°F(21°C) (0.9°F) Set point 70°F(21°C) --> shift 2.0°C 76.1°F(24.5°C) 73.
Main Functions SiUS04-921 2.22 Fan Speed Control for Indoor Units Control mode The airflow can be automatically controlled depending on the difference between the set temperature and the room temperature. This is done through speed control and Hall IC control. Phase steps Speed control and fan speed control contains different steps: .
SiUS04-921 Main Functions Heating Room temp.area Indoor heat exchanger temperature area A G MH F ML E ML D L C L B L A LL B C MH MH ML ML ML ML L L L L L L LL LL D E MH MH M M ML M ML ML L ML L L LL LL F G MH MH MH MH M MH M M ML ML L L LL LL H I MH MH MH MH MH MH MH MH M M M M M M J MH MH MH MH MH MH MH K L MH MH MH MH MH MH MH MH MH MH MH MH MH MH Room temperature area Set point - room temperature °C / °F –1.5/–2.7 A –1.0/–1.8 B –0.5/–0.
Main Functions SiUS04-921 2.23 Draft Prevention (Hot-Start) Outline Draft prevention control is carried out to prevent a cold draft feeling when the unit is started in heating operation. This also will happen if the indoor heat exchanger temperature drops. Details The outdoor unit will prevent a cold draft by monitoring the indoor heat-exchanger thermistor. It will increase the minimum compressor frequency if the indoor heat exchanger drops below 33°C (91.4°F).
SiUS04-921 Control Specification 3. Control Specification 3.1 Frequency Control Outline Once the timers for the compressor start-up have elapsed, the unit will determine its compressor frequency from the following parameters; ΔD: The difference between the room temperature and the setpoint (°C) Indoor frequency command The indoor command frequency is determined by the difference between the room temperature and the temperature set by the remote controller.
Control Specification SiUS04-921 (ΔD currently – ΔD last measurement ) x 4 3.2 Preheating Operation (Quick Warming Function) Outline Operate the inverter in the open phase operation with the conditions including the preheating command from the discharge pipe temperature. Details ON condition The preheating operation starts when the discharge pipe temperature drops. At that time, the inverter in open phase operation starts.
SiUS04-921 Control Specification The four-way valve compensation function is engaged in four cases When starting the compressor for heating. When the operation mode is changed. When starting the compressor for defrosting. When starting the compressor after a power failure (auto-restart). No power to the valve --> cooling. Power to the valve --> heating. Frequency [Hz] 52 Cooling Heating 3.4 Time [sec] outdoor temperature < 16°C(60.8°F) 52 outdoor temperature ≥ 16°C(60.8°F) – 0.
Control Specification 3.5 SiUS04-921 Fan Speed Control for Outdoor Unit Outline The fan speed control regulates the speed of the outdoor fan. Details Fan control is carried out according to the following conditions. 1. Fan ON control for electric component cooling fan 2. Fan control when defrosting 3. Fan OFF delay when stopped 4. ON/OFF control when cooling operation 5. Fan control during heating operation Cooling Outdoor temperature Inverter fan ON –12˚C(10.
SiUS04-921 3.6 Control Specification Fin Thermistor Control Outline When the fin temperature rises, the fan rotation speed will increase to protect the electrical parts. This function is only applicable for inverters. The temperature sensor is located on the top of the radiation fins connected to the power elements of the electronic inverter circuit (PAM & PWM). Details Stop 86˚C(186.8˚F) 76˚C(168.8˚F) Step down 73˚C(163.4˚F) Steady 71˚C(159.8˚F) Up 68˚C(154.
Control Specification SiUS04-921 I3–I3α 4.5 6.5 8.75 9.5 9.5 9.5 Return area: Limiting control for the maximum frequency is cancelled. Steady area: The maximum frequency remains constant. Step down area: The maximum frequency in this control is defined as (operation frequency – 2 Hz). After this, the frequency decreases by 2 Hz / 1 second until it reaches the steady area. Stop area: When this state continues for 5 seconds, the compressor will stop.
SiUS04-921 Control Specification Stop area: The compressor, indoor fan, and outdoor fan will stop. 3.9 Indoor Heat Exchanger Freeze-up Protection Outline During cooling or dry operation, a malfunction of the unit may cause the indoor heat exchanger's temperature to drop excessively. To prevent the indoor heat exchanger from freezing up, the freeze protection function will reduce the compressor's maximum operation frequency.
Control Specification SiUS04-921 3.10 Dew Prevention Outline Cooling the air around us means that the air is dehumidified (condensation of water on the coil). But because the air is cooled down, less water can be absorbed by the air and as a consequence the relative humidity of the air rises. When the relative humidity of the outlet air nears 100%, you will have water being blown in.
SiUS04-921 Control Specification 3.11 Liquid Compression Protection 2 Outline The function will ensure a pressure differential between the high pressure and the low pressure. This is required when cooling with low outdoor air temperature because HP gets weak and you will have small capacity and a high power input. The compressor stops according to the conditions of the outdoor air temperature.
Control Specification SiUS04-921 Correction value by outdoor temperature (c) Outdoor temperatureCorrection value (c) = 0°C (1.8°F) – 9°C (15.8°F) –10°C(14°F) Correction value (c) = 7°C (12.6°F) (R10102) Return area: Limiting control for the maximum frequency is cancelled. Up area: The maximum frequency increases by 2Hz / 60 seconds. Steady area: The maximum frequency remains constant. Step down area: The maximum frequency decreases by 4Hz / 30 seconds.
SiUS04-921 Control Specification Operation during Defrosting and Termination Condition • Operation should be conducted at 64Hz during defrosting. • Defrosting operation must be conducted for 2 minutes, and after that, defrosting operation is conducted until the outdoor heat exchanger temperature reaches the defrost cancellation temperature at ºC. • After the temperature has reached the defrost cancellation temperature, the defrosting should be terminated.
Control Specification Operation pattern Main operation control Control for abnormally high discharge temperature The gray squares indicate which secondary functions are active or can be activated. Control when frequency is changed Details SiUS04-921 Power ON Cooling 1 room operation Power initialization control Control when starting — — — Control of target discharge temp.
SiUS04-921 Control Specification Ending Condition After 6 minutes from the time compressor starts. or Discharge temperature(°C) + 6 > condensation temperature (°C) > (36°C) (96.
Control Specification SiUS04-921 3.14.4 Superheat (SH) is required to ensure that only gas and not liquid enters the compressor. Because of the direct link between the SH and the discharge temperature (see the following figure show the target discharge temperature), a control on the discharge temperature was made to be one of the main control systems of Daikin airconditioners.
SiUS04-921 Control Specification 3.14.5 Pressure Equalization Control Outline The pressure difference between both sides of the expansion valve works as an extra load when restarting the compressor. To limit the load on the compressor when restarting it and consequently limit the starting current, a pressure-equalization is performed after deactivating the compressor. Pressure equalization is achieved by opening the expansion valve to a certain level and then closing it again.
Control Specification SiUS04-921 3.14.6 Control for Abnormally High Discharge Temperature Outline An abnormally high discharge temperature is an indication for a too high suction temperature or super-heat. Making adjustments to the expansion valve opening can solve this problem. Details Increasing the expansion valve opening will increase the refrigerant flow through the evaporator and decrease the superheat and the discharge temperature.
SiUS04-921 Part 5 System Configuration 1. Installation Manual ................................................................................54 1.1 Indoor Units ............................................................................................54 1.2 Outdoor Units .........................................................................................64 2. System Configuration............................................................................70 3. Instruction...........................
Installation Manual SiUS04-921 1. Installation Manual 1.1 Indoor Units Indoor Unit Installation Drawings 1. Removing and installing indoor unit. • Installation method 1) Using the marks (3 locations) on top of the indoor unit, attach the A mounting plate hooks onto the indoor unit. 2) Attach the tabs on the bottom frame onto the A mounting plate. If the tabs are not hooked onto the plate, remove the front grille to hook them. (Check to see if the tabs are hooked securely.
SiUS04-921 Installation Manual Installation Tips 1. Removing and installing front panel. Rotating shaft Rotating shaft • Removal method 1) Open the front panel. 2) Spread out the shaft hole on the left side and remove the rotating shaft. Spread out the shaft hole on the right side as well and remove the rotating shaft. Shaft hole Shaft hole • Installation method Insert the right and left rotating shafts on the front panel into the shaft holes one at a time and slowly close the panel.
Installation Manual 4. Installing the titanium apatite photocatalytic air-purifying filter and deodorizing filter for streamer. 1) Open the front panel to pull out the air filter. 2) Attach the C titanium apatite photocatalytic airpurifying filter. 3) Attach the B deodorizing filter for streamer. 4) Replace the air filter to its original position and close the front panel. 5. SiUS04-921 How to replace the drain plug and drain hose.
SiUS04-921 Installation Manual Indoor Unit Installation 1. Installing the mounting plate. • The A mounting plate should be installed on a wall which can support the weight of the indoor unit. 1) Temporarily secure the A mounting plate to the wall, make sure that the panel is completely level, and mark the fixing points on the wall. 2) Secure the A mounting plate to the wall with screws.
Installation Manual 4. SiUS04-921 Laying piping and wiring. • Lay the piping and drain hose according to the orientation of the piping coming out of the unit, as shown below. • Make sure the drain hose is sloped downward. • Wrap the piping and drain hose together using insulation tape. Piping bundle diagram Inter-unit wiring Gas pipe Drain hose Liquid pipe Insulation tape 4-1. Right-side, right-back, or right-bottom piping.
SiUS04-921 Installation Manual Indoor Unit Installation 4-4. Wall embedded piping. Follow the instructions given under Left-side, left-back, or left-bottom piping . 1) Insert the drain hose to this depth so it won’t be pulled out of the drain pipe. Insert drain hose to this depth so it won’t be pulled out of drain pipe. Inner wall 1-15/16 inch (50mm) or more Drain hose Vinyl chloride drain pipe (VP-30) Outer wall WARNING Do not bundle the power code with a binding band, a twist tie or other method.
Installation Manual 6. SiUS04-921 Connecting to the HA system. 1) Remove the front grille. (3 screws) 2) Remove the decelerator assembly parts. (1 screw) 2-1) Remove the decelerator assembly part screws. (See Fig. 1) 2-2) Remove the decelerator assembly part connector. Remove by pressing on the tabs on the bottom of the connector. (See the tab position diagram 1) 3) Remove the electric parts box. (1 screw, 2 tabs) 3-1) Remove the electric parts box fixing screw.
SiUS04-921 Installation Manual Indoor Unit Installation 7. Drain piping. The drain hose should be inclined downward. 1) Connect the drain hose, as described right. No trap is permitted. Do not put the end of the hose in water. 3) When drain hose requires extension, obtain an extension hose commercially available. Be sure to thermally insulate the indoor section of the extension hose.
Installation Manual SiUS04-921 Refrigerant Piping Work 1. Flaring the pipe end. (Cut exactly at right angles.) 1) Cut the pipe end with a pipe cutter. 2) Remove burrs with the cut surface facing downward so that the chips do not enter the pipe. 3) Put the flare nut on the pipe. 4) Flare the pipe. 5) Check that the flaring is properly made. Remove burrs Flaring Set exactly at the position shown below.
SiUS04-921 Installation Manual Trial Operation and Testing 1. Trial operation and testing. 1-1. Measure the supply voltage and make sure that it falls in the specified range. 1-2. Trial operation should be carried out in either cooling or heating mode. • In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature. 1) Trial operation may be disabled in either mode depending on the room temperature.
Installation Manual 1.2 SiUS04-921 Outdoor Units Outdoor Unit Installation Drawings Max. allowable length Wrap the insulation pipe with the finishing tape from bottom to top. 32ft (10m) Max. allowable height 26ft (8m) Gas pipe O.D. 3/8 inch (9.5mm) Liquid pipe O.D. 1/4 inch (6.4mm) * No refrigerant needs to be added if the piping does not exceed the maximum length. Allow space for piping and electrical servicing. Allow 11-13/16 inch (300mm) of work space below the ceiling surface.
SiUS04-921 Installation Manual Outdoor Unit Installation (1) 1. Installing outdoor unit. 1) When installing the outdoor unit, refer to “Precautions for Selecting the Location” and the “Outdoor Unit Installation Drawings”. 2) If drain work is necessary, follow the procedures below. 2. Drain work (heat pump-models). 1) Use drain plug for drainage.
Installation Manual SiUS04-921 Outdoor Unit Installation (2) 5. Purging air and checking gas leakage. • When piping work is completed, it is necessary to purge the air and check for gas leakage. WARNING 1) 2) 3) 4) Do not mix any substance other than the specified refrigerant (R410A) into the refrigeration cycle. When refrigerant gas leaks occur, ventilate the room as soon and as much as possible.
SiUS04-921 Installation Manual Outdoor Unit Installation (3) 6. Refilling the refrigerant. Check the type of refrigerant to be used on the machine nameplate. Precautions when adding R410A Fill from the liquid pipe in liquid form. It is a mixed refrigerant, so adding it in gas form may cause the refrigerant composition to change, preventing normal operation. 1) Before filling, check whether the cylinder has a siphon attached or not.
Installation Manual SiUS04-921 Wiring (1) WARNING 1) Do not use spliced wires, stranded wires, extension cords, or starburst connections, as they may cause overheating, electrical shock, or fire. Follow all Local, and State electrical codes. 2) Do not use locally purchased electrical parts inside the product. (Do not overload the circuit by adding drain pump or other electrical equipment to unit terminals.) Doing so may cause electric shock or fire. 3) Be sure to install a ground leak detector.
SiUS04-921 Installation Manual Wiring (2) CAUTION (1) In case using stranded wires is unavoidable for some reason, make sure to install the round crimp-style terminals on the tip. Round crimp-style terminal Stranded wire Place the round crimp-style terminals on the wires up to the covered part and secure in place. Screw 1) Use the following method when installing a single core wire.
System Configuration SiUS04-921 2. System Configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know the most beneficial method of using it.
SiUS04-921 Instruction 3. Instruction 3.
Instruction 72 SiUS04-921 System Configuration
SiUS04-921 3.2 Instruction Cooling · QUATERNITY DRYING Operation QUATERNITY QUATERNITY 18°C - 32°C (64°F - 90°F) -3°C (-5°F) - STD QUATERNITY DRYING OPERATION to QUATERNITY DRYING may raise humidity temporarily.
Instruction 3.
SiUS04-921 3.
Instruction 3.
SiUS04-921 3.
Instruction 3.
SiUS04-921 3.8 Instruction TIMER Operation 0.5°C (1°F) during COOLING or DRY COOLING and turns down 2°C 2°C (3.6°F) during heating.
Instruction 3.9 SiUS04-921 COMFORT SLEEP Operation wake up. 26 - 29°C (79 - 84°F) 20 - 25°C (68 - 77°F) 2°C (3.6°F) 1°C (1.
SiUS04-921 Instruction 3.
Instruction SiUS04-921 3.11 INFORMATION DISPLAY QUATERNITY DRYING mode or -9°C (16°F). 37°C (99°F).
SiUS04-921 Part 6 Service Diagnosis 1. Convenient Service Check Function .....................................................85 2. Troubleshooting ....................................................................................87 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 Error Code Indication by Remote Controller ..........................................87 Air conditioner does not run. ......
SiUS04-921 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 84 Power Supply Waveform Check...........................................................143 Main Circuit Electrolytic Capacitor Check ............................................143 Refrigerant System Check ...................................................................144 “Inverter Checker” Check .....................................................................145 Power Transistor Check .......................................
SiUS04-921 Convenient Service Check Function 1. Convenient Service Check Function Failure diagnosis with operation lamp The operation lamp on the display of the indoor unit flashes when any of the following failures are detected. 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions and the system does not work. 2. When a signal transmission error occurs between the indoor and outdoor units.
Convenient Service Check Function SiUS04-921 Failure diagnosis by LED indication The following failure diagnosis can be done by LED indication on the outdoor unit PCB. 1. The outdoor unit has 2 green LED(LED A, LED5) on the PCB. Refer to page 11. The flashing green LED indicates "in order" condition. The turned ON or OFF LED indicates the failure related to the microcomputer. PCB is set upside down (with backside up). LED A can be visually inspected through an inspection slit.
SiUS04-921 Troubleshooting 2. Troubleshooting 2.1 Error Code Indication by Remote Controller * Various cases may be possible. Code Unit Description Air conditioner does not run. Basic Failure Diagnosis A1 A5 A6 AH C4 C7 C9 CC E1 E5 E6 E7 E8 EA F3 F6 H0 H6 H8 H9 J3 J6 L3 L4 L5 P4 U0 U2 U4 Indoor Outdoor Outdoor System Outdoor U7 UA System – System Service Diagnosis Reference page 88 Air conditioner runs but does not get cooling (heating). When operation starts, safety breaker trips.
Troubleshooting 2.2 SiUS04-921 Air conditioner does not run. Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 88 Power supply is OFF Improper power supply voltage Improper connection of wire Incorrect combination of indoor unit and outdoor unit Battery shortage of remote controller Invalid address setting Protection device works (dirty air filter, insufficient charge of refrigerant, overcharge of refrigerant, mixed air, etc.
SiUS04-921 Troubleshooting Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Is the power supply plug inserted into the outlet or the breaker for the power supply breaker ON? NO Insert the power supply plug into the outlet. Turn on the breaker for the power supply. YES Do the other electric appliances work? NO Power failure? YES Wait till the power failure restored.
Troubleshooting SiUS04-921 Continued from the previous page YES Operation lamp flashes? NO Is an error code displayed on the remote controller? YES Diagnose by an error code Go to troubleshooting. NO Does it operate on test operation mode? NO Replace the outdoor unit PCB. YES Diagnose the indoor unit and the outdoor unit by LED Go to LED diagnosis.
SiUS04-921 2.3 Troubleshooting Air conditioner runs but does not cool or heat Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Service Diagnosis Incorrect temperature setting Incorrect combination of indoor unit and outdoor unit Blocked air filter Insufficient power Refrigerant piping is too long Improper setting of piping length Defective field piping (squeezed, etc.
Troubleshooting SiUS04-921 Troubleshooting Caution Check No.02 Refer to P.141 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Is the set temperature correct? NO Thermostat off Set the temperature properly. YES Is there the required installation space? (It isn’t short circuited?) NO Secure required space. YES Is the indoor unit compatible for connecting with the outdoor unit? NO Check the compatibility.
SiUS04-921 2.4 Troubleshooting When operation starts, safety breaker trips Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Service Diagnosis Insufficient capacity of safety breaker Ground leakage breaker is too sensitive Not exclusive circuit The supply voltage is not within rated voltage ±10%.
Troubleshooting SiUS04-921 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. [Power supply] Check No.29 Refer to P.151 Is the capacity of safety breaker as specified? NO Replace the safety breaker to a specified one. YES Does the ground leakage breaker work? YES Increase the set value of the ground leakage current on the breaker (or replace the breaker).
SiUS04-921 2.5 Troubleshooting Air conditioner makes a loud sound and vibrates. Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Piping length is too short Mounting wall is too thin Insufficient vibration prevention measures Deformation of the unit Improper quantity of refrigerant Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur.
Troubleshooting 2.
SiUS04-921 2.7 Troubleshooting Peak-cut Control or Freeze-up Protection Remote Controller Display A5 Method of Malfunction Detection Peak-cut control (high pressure control) During heating operation, the temperature detected by the indoor heat exchanger thermistor is used for the high pressure control (stop, outdoor fan stop, etc.). Freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor heat exchanger thermistor.
Troubleshooting SiUS04-921 Troubleshooting Caution Check No.02 Refer to P.141 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Check air passages YES Is there any short-circuit? Reserve the space for the air passages. NO Check the air filter for dirtiness YES (dirty) Is it very dirty? Clean the air filter. Not much Check indoor unit heat exchanger for dirtiness YES (dirty) Is it very dirty? Clean the heat exchanger.
SiUS04-921 2.8 Troubleshooting Fan Motor System (DC Motor) Abnormality Remote Controller Display A6 Method of Malfunction Detection The fan speed detected by the Hall IC during operation of high-pressure fan motor is used to determine abnormal fan operation. Malfunction Decision Conditions When the detected fan speed is less than 50% of the HH tap under the maximum fan motor rpm demanded.
Troubleshooting SiUS04-921 Troubleshooting Caution Check No.18 Refer to P.149 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Turn off the power supply (Turn off the breaker). * Connect the connector again for ensuring the connection. Check the connector connection (S1). Caution If the connector is disconnected while the power is ON, the motor will be broken. (Turn power off when connecting the connector.
SiUS04-921 2.9 Troubleshooting Streamer Unit Abnormality Remote Controller Display AH Method of Malfunction Detection Malfunction Decision Conditions If the error repeats 3 times in air purifying operation. Clearing condition: Continuous run for about 2 minutes (normal). Supposed Causes Short circuit caused by the dust or water on the streamer unit electrode part. Scratch or crack in the harness for the streamer unit.
Troubleshooting SiUS04-921 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Dust or drip of water is on the streamer unit. YES Clean the streamer unit. NO Does the multi-monitor LED blink about 1 minute after air purifying operation starts? NO Clean the streamer unit. YES Turn off the power supply (Turn off the breaker). Is the streamer unit installed securely? NO Install it securely.
SiUS04-921 Troubleshooting 2.10 Thermistor System Abnormality Remote Controller Display C4, C9 Method of Malfunction Detection Thermistor fault is detected based on the temperature determined by each thermistor Malfunction Decision Conditions When power is supplied and the input of thermistor is 4.96 V or more or 0.04 V or less * (for reference) In case of 120 Ω (equivalent to 212°C / 413.
Troubleshooting SiUS04-921 2.11 Front Panel Open / Close Abnormality C7 Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions The system will be shut down when the error occurs twice. Supposed Causes Malfunction of the reduction motor Malfunction or deterioration of the front panel mechanism Malfunction of the limit switch Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting the connector, or parts damage may occur.
SiUS04-921 Troubleshooting 2.12 Humidity Sensor Abnormality Remote Controller Display CC Method of Malfunction Detection Sensor fault is detected by input value. Malfunction Decision Conditions When the input from a temperature sensor is 4.96 V or more or 0.04 V or less* Supposed Causes Improper connector connection Defective indoor control PCB Defective humidity sensor PCB Troubleshooting Caution Check No.27 Refer to P.
Troubleshooting SiUS04-921 2.13 Signal Transmission Error (Indoor Unit - Outdoor Unit) Remote Controller Display U4 Method of Malfunction Detection The data sent from the outdoor unit is checked for problem. Malfunction Decision Conditions When the data sent from the outdoor unit can not be received without error, or when the disabled status of signal transmission continues for 15 seconds and the same status continuously repeats 3 times.
SiUS04-921 Troubleshooting Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Check the relay wire between the indoor unit and the outdoor unit for color and number. Is there any improper wiring? YES * For the machine with stand-by power saving function, perform setting of fan operation to release the stand-by power function. Correct the relay wire between indoor and outdoor unit. Voltage 7 sec. 15 sec.
Troubleshooting SiUS04-921 2.14 Incompatible Power Supply between Indoor Unit and Outdoor Unit Remote Controller Display UA Method of Malfunction Detection Check the incompatible power supply between the indoor unit and the outdoor unit by using signal transmission. Method of Malfunction Detection In case that the incorrect indoor model is connected to the incorrect outdoor model.
SiUS04-921 Troubleshooting 2.15 Outdoor Unit PCB Abnormality Remote Controller Display E1 Outdoor Unit LED Display A5 Method of Malfunction Detection Detect within the program of the microcomputer if the program is in good running order. Detect input of zero-cross signal. Malfunction Decision Conditions When the program of the microcomputer is in bad running order. Zero-cross signal can not be detected.
Troubleshooting SiUS04-921 2.16 OL Activation (Compressor Overload) Remote Controller Display E5 Method of Malfunction Detection A compressor overload is detected through compressor OL. Malfunction Decision Conditions If the compressor OL is activated twice, the system will be shut down. The error counter will reset itself if this or any other error does not occur during the following 60-minute compressor running time (total time). ∗ The operating temperature condition is not specified.
SiUS04-921 Troubleshooting 2.17 Compressor Lock Remote Controller Display E6 Outdoor Unit LED Display A5 Method of Malfunction Detection Judging from current waveform generated when high-frequency voltage is applied to the compressor. Malfunction Decision Conditions The machine is shut down when the fault count reaches 16. Clear condition: Continuous operation for 11 min.
Troubleshooting SiUS04-921 2.18 DC Fan Lock Remote Controller Display E7 Outdoor Unit LED Display A5 Method of Malfunction Detection Identify the fan motor system fault based on the fan speed detected by Hall IC while the high pressure fan motor is running. Malfunction Decision Conditions When the fan motor is running, the fan does not rotate for 60 seconds or more. Shut down when the error repeats 16 times Clear condition: The fan continuously rotates for 11 minutes without fault.
SiUS04-921 Troubleshooting 2.19 Input Overcurrent Detection Remote Controller Display E8 Outdoor Unit LED Display A5 Method of Malfunction Detection Detect an input overcurrent by checking the inverter power consumption or the input current detected by CT with the compressor running. Malfunction Decision Conditions When 14 A or more of inverter power consumption or CT input continues for 5 seconds. The compressor stops if the error occurs, and restarts automatically after 3 minutes standby.
Troubleshooting SiUS04-921 Troubleshooting Caution Check No.03 Refer to P.142 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. *Input overcurrent may be caused by improper wiring inside the machine. If the machine stops due to input overcurrent after connecting or disconnecting wires to replaced part, check wiring for proper connection. Restart and measure the input current Check No.11 Refer to P.
SiUS04-921 Troubleshooting 2.20 Four-Way Valve Abnormality Remote Controller Display EA Outdoor Unit LED Display A5 Method of Malfunction Detection The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor air thermistor, and the outdoor heat exchanger thermistor are checked to see if they function within their normal ranges in the operating mode.
Troubleshooting SiUS04-921 Troubleshooting Caution Check No.02 Refer to P.141 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Does the coil of four way valve get out of place (loosen)? YES Rectify it. NO Check No.12 Refer to P.144 Is the harness disconnected from connector? YES Reconnect properly. NO Check No.31 Refer to P.152 Four-way valve coil and harness conductivity check Disconnect the harness from the connector.
SiUS04-921 Troubleshooting 2.21 Discharge Pipe Temperature Control Remote Controller Display F3 Outdoor Unit LED Display A5 Method of Malfunction Detection Discharge pipe temperature control (stop, frequency attenuation, etc.) is executed based on the temperature detected by the discharge pipe thermistor. Malfunction Decision Conditions The compressor stops when the discharge pipe temperature is 118°C(244.4°F) or more.
Troubleshooting SiUS04-921 2.22 High Pressure Control in Cooling Remote Controller Display F6 Outdoor Unit LED Display A5 Method of Malfunction Detection During cooling, high pressure control (stop, frequency attenuation, etc.) is executed according to the temperature detected by the heat exchanger thermistor. Malfunction Decision Conditions During cooling, when the temperature detected by the heat exchanger thermistor is 63°C(145.4°F) or more.
SiUS04-921 Troubleshooting Troubleshooting Caution Check No.02 Refer to P.141 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Check installation space Check No. 03 Installation condition check Check No.03 Refer to P.142 NG Change the position of air discharge grille. Change installation position. Clean the heat exchanger. OK Check No. 05 Outdoor fan system check NG Replace the fan motor. Rectify connector and fan motor lead wire.
Troubleshooting SiUS04-921 2.23 Compressor Sensor System Abnormality Remote Controller Display H0 Outdoor Unit LED Display A5 Method of Malfunction Detection Fault condition is identified by DC current which is detected before compressor startup. Malfunction Decision Conditions When the DC current before compressor startup is other than 0.5 to 4.5 V (detected by converting the sensor output to voltage), or the DC voltage is 50 V or less.
SiUS04-921 Troubleshooting 2.24 Position Sensor Abnormality Remote Controller Display H6 Outdoor Unit LED Display A5 Method of Malfunction Detection Startup failure of the compressor is identified by rpm information of the compressor and by the electric component position detector.
Troubleshooting SiUS04-921 Troubleshooting Caution Check No.14 Refer to P.145 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Check the power supply Check No. 16 Discharge pressure check Check No.16 Refer to P.147 Judge NO Replace stop valve. YES Check No.29 Refer to P.151 Check No.
SiUS04-921 Troubleshooting 2.25 DC Voltage / DC Current Sensor Abnormality Remote Controller Display H8 Outdoor Unit LED Display A5 Method of Malfunction Detection DC voltage or DC current sensor system fault is identified based on the compressor operation frequency and the input current detected by the product of DC current and DC voltage. Malfunction Decision Conditions When the compressor operation frequency is more than 62 Hz and when the input current is less than 0.25 A for 90 sec.
Troubleshooting SiUS04-921 2.26 Thermistor System Abnormality Remote Controller Display P4, J3, J6, H9 Outdoor Unit LED Display A5 Method of Malfunction Detection This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature detected by each thermistor. Malfunction Decision Conditions When power is supplied and the thermistor input is 4.98 V or more or when the thermistor input is 0.
SiUS04-921 Troubleshooting Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Turn on the power supply again Check No.02 Refer to P.141 Does the remote controller display the error code again? NO Reconnect properly. YES Check No.02 Thermistor resistance check Is it OK? NO Replace the thermistor. YES Check No.02 Thermistor resistance check NO Is it OK? Replace the thermistor.
Troubleshooting SiUS04-921 2.27 Abnormal Temperature in Electrical Box Remote Controller Display L3 Outdoor Unit LED Display A5 Method of Malfunction Detection Temperature rise in the electrical box is identified based on the temperature of the radiation fin detected by the fin thermistor with the compressor off. Malfunction Decision Conditions When the temperature of the radiation fin is 122°C(251.6°F) or more during the compressor off. (When the temperature drops below 113°C(235.
SiUS04-921 Troubleshooting Troubleshooting Caution Check No.02 Refer to P.141 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. (Note on resetting power supply) To reset the machine, power off status need to continue at least 30 sec. WARNING Turn off the power and turn it on again.
Troubleshooting SiUS04-921 2.28 Temperature Rise in Radiation Fin Remote Controller Display L4 Outdoor Unit LED Display A5 Method of Malfunction Detection Temperature rise in the radiation fin is identified based on the temperature of the radiation fin detected by the fin thermistor with the compressor on. Malfunction Decision Conditions The compressor stops when the radiation fin temperature is 86 °C (186.8°F) or more.
SiUS04-921 Troubleshooting Troubleshooting Caution Check No.02 Refer to P.141 Check No.03 Refer to P.142 Be sure to turn off the power switch before connecting or disconnecting power switch before connect or disconnect connector, the connector, or may partsbe damage may occur. or parts damage occurred. WARNING Turn off the power supply and turn it on again to get the system started.
Troubleshooting SiUS04-921 2.29 Output Overcurrent Remote Controller Display L5 Outdoor Unit LED Display A5 Method of Malfunction Detection An output overcurrent is detected by checking the current that flows in the inverter DC section. Malfunction Decision Conditions A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running.
SiUS04-921 Troubleshooting Troubleshooting Caution Check No.03 Refer to P.142 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. *Output overcurrent may caused by improper wiring inside the machine. If the machine stops due to output overcurrent after connecting or disconnecting wires to replace part, check wiring for proper connection. Is the stop valve fully opened? NO Open the stop valve fully. YES Check No.14 Refer to P.
Troubleshooting SiUS04-921 2.30 Insufficient Gas Remote Controller Display U0 Outdoor Unit LED Display A5 Method of Malfunction Detection Gas shortage detection I: Gas shortage is detected by checking the input current value and the compressor running frequency. If the gas is short, the input current is smaller than the normal value. 55 ( - ) Gas shortage detection III: Gas shortage is detected by checking the difference between ambient temperature and heat exchanger temperature.
SiUS04-921 Troubleshooting Troubleshooting Caution Check No.02 Refer to P.141 Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Is the stop valve opened? NO Open the stop valve. YES Check gas leakage. Check No.17 Refer to P.148 Oil oozing at field pipe connections? YES Repair flared portion of piping or replace square union.
Troubleshooting SiUS04-921 2.31 Over Voltage Protection / Low Voltage Protection Remote Controller Display U2 Outdoor Unit LED Display A5 Method of Malfunction Detection Detect an abnormal increase or drop of voltage by the detection circuit or DC voltage detection circuit.
SiUS04-921 Troubleshooting 2.32 Outdoor Unit PCB Abnormality or Communication Circuit Abnormality Remote Controller Display U4 Outdoor Unit LED Display A5 Method of Malfunction Detection Detect within the program of the microcomputer whether or not the program is in good running order. Malfunction Decision Conditions 1. When the program of the microcomputer is in bad running order. 2. When indoor-outdoor unit signal transmission can not be performed for more than 15 seconds. 3.
Troubleshooting SiUS04-921 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Check indoor unit also, because a communication circuit fault may be caused by the problem related to the indoor unit. Check supply voltage NO Rectify the power supply. Rated voltage? YES Check the varistor on the outdoor unit PCB YES Replace the varistor.
SiUS04-921 Check No.08 Refer to P.143 Troubleshooting Continued from the previous page NO Does LED A turn off? Check grounding YES NO Grounded? YES Check No.08 Power supply waveform check Carry out grounding work. The cause seems to be an external factor other than failure of the outdoor unit PCB. Investigate source of noise and take measures. YES Disturbance? Investigate the cause of disturbance and take remedial action. NO Turn off the power supply. Disconnect No.
Troubleshooting SiUS04-921 2.33 Signal Transmission Error on Outdoor Unit PCB Remote Controller Display U7 Outdoor Unit LED Display A5 Method of Malfunction Detection Communication error between microcomputer mounted on the main body and inverter. Malfunction Decision Conditions When the data sent from the microcomputer of the inverter can not be received 15 times successively or for 15 sec, the machine shuts down.
SiUS04-921 Troubleshooting Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur. Check blinking interval of LED 5 Is it 0.5 sec.? (same as LED A) YES (0.5 sec. interval) NO (0.2 sec. interval) Check voltage between +5V and GND NO Replace the outdoor unit PCB. 5 V±0.5 V YES Power on again YES Is the fault repeated? Replace the outdoor unit PCB.
Troubleshooting SiUS04-921 2.34 Lights-out of Microcomputer Status Lamp Remote Controller Display — Outdoor Unit LED Display A1 Method of Malfunction Detection When a microcomputer fault is detected, LED A or LED 5 turns off. 51 ( - ) Malfunction Decision Conditions Supposed Causes Outdoor unit PCB has no power Power supply failure due to noise Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts damage may occur.
SiUS04-921 Check 3. Check 3.1 Thermistor Resistance Check Check No.02 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below. Thermistor Temperature (°C / °F) –20 / –4 –15 / 5 –10 / 14 –5 / 23 0 / 32 5 / 41 10 / 50 15 / 59 20 / 68 25 / 77 30 / 86 35 / 95 40 / 104 45 / 113 50 / 122 R25°C(77°F)=20kΩ B=3950 211.0 (kΩ) 150 116.5 88 67.2 51.9 40 31.
Check 3.2 SiUS04-921 Installation Condition Check Check No.03 Installation condition check Check the allowable dimensions of the air suction and discharge area. Abnormal Change the position of the air discharge grille or the installation location. Normal Does the discharged air from other outdoor unit cause an increase of the suction air temperature? YES Change the position of the air discharge grille or the installation location.
SiUS04-921 3.4 Check Power Supply Waveform Check Check No.08 Check the voltage waveform between power supply terminals on the terminal board for disturbance using oscillo-tester. Check to see if the power supply waveform is a sine wave (Fig.1). Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2) [Fig.1] 3.5 [Fig.2] Main Circuit Electrolytic Capacitor Check Check No.11 Do not touch the live parts within 10 minutes after the breaker is turned off.
Check 3.6 SiUS04-921 Refrigerant System Check Check No.12 Refrigerant system check (blockage, gas leakage, insufficient gas are to be checked) Models with discharge pipe thermistor Is the discharge pipe thermistor disconnected from the holder? YES Rectify. NO Is the temperature of suction pipe of four-way valve extremely high? YES Replace the four-way valve. NO Gas leakage check Refer to the insufficient gas detection Replace the gas.
SiUS04-921 3.7 Check “Inverter Checker” Check Check No.14 1. Characteristics If abnormal stop occurs due to compressor startup failure or overcurrent output when using inverter unit, it is difficult to judge it results from the compressor failure or other failure (control PCB, power transistor, etc.). The inverter analyzer makes it possible to judge the cause of trouble easily and securely. (Connect this analyzer as a quasi-compressor instead of compressor and check the output of inverter) 2.
Check SiUS04-921 3. Diagnose method (Diagnose can be made according to 6 LEDs lighting status as follows:) (1) When all LEDs are lit uniformly, → Compressor malfunction (to be replaced) (2) When some of LEDs are not lit (LEDs are not lit or go off, etc.): Check the individual power transistor. (Refer to check No.15) ∗ When the power transistor and control PCB are integrated : → Replace the control PCB. ∗ When the power transistor can be checked individually : ↓ Check the resistance value.
SiUS04-921 3.9 Check Discharge Pressure Check Check No.16 Discharge pressure check Is it high? NO Replace the compressor. YES Is the stop valve open? NO Open the stop valve. YES Is the connection pipe deformed? YES Replace the field piping. NO Are the heat exchanger and air filter dirty? NO YES Clean it. Replace the compressor.
Check SiUS04-921 3.10 Electronic Expansion Valve Check Check No.17 Check the electronic expansion valve (EV) as follows: 1. Check if the EV connector is properly inserted into the control PCB. Collate the number of EVs in the main body with those of the connector. 2. Check to see if clicking (latching sound) is heard from all of the EVs when turning on the power supply again after turning it off. 3.
SiUS04-921 Check 3.11 Indoor Unit PCB Output Check Check No.18 1. Check for proper connection. 2. Check supply voltage applied to the motor output (between No. 4 pin and No. 7 pin. 3. Check motor control voltage output (between No. 3 pin and No. 4 pin). Check rpm command voltage output (between No. 2 pin and No. 4 pin). S1 7 Motor supply voltage 6 Vacant pin 5 Vacant pin 4 P.OV(Reference electric potential) 3 Motor control voltage (DC15V) 2 RPM command voltage (DC~6.
Check SiUS04-921 3.12 Rotating Pulse Input on Outdoor Unit PCB Check Check No.23 < For propeller fan motor> Make sure voltage of 270 ± 30 V is applied. 1. Set power ON and operation OFF. Remove connector S70. 2. Check that the voltage between No. 4 pin and No.7 pin is 270 VDC. 3. Check that the control voltage between No. 3 pin and No. 4 pin is 15 VDC. 4. Check that the RPM command voltage between No. 2 pin and No. 4 pin is 5 VDC. 5. Set power OFF and operation OFF. Connect connector S70. 6.
SiUS04-921 Check 3.13 Humidity Sensor Check Check No.27 1. Check for proper connection. 2. Check sensor input level (*1). 3. Change ambient conditions (*2) and check that input level changes accordingly. *1 Input level varies depending on the sensor. *2 Changes in humidity, temperature, airflow rate. To do this, merely breatheon the sensor. 12V 5V S48 1 2 Buzzer 3 4 Humidity sensor 5 C70 6 Room temperature thermistor GND (R6023) 3.14 Main Circuit Short Check Check No.
Check SiUS04-921 3.15 Four-Way Valve Performance Check Check No.31 < Caution on resetting the power supply > * Be sure to wait for 30 sec. or more after turning off the power supply. Turn off the power and turn it on again. S80 voltage at DC 0 V with outdoor unit on? NO Replace the outdoor unit PCB. YES Start the heating-mode run. S80 voltage at DC 130-230 V for 3 sec. after compressor starts, and then at about DC 12 ~15V after that? (Fig.
SiUS04-921 Check 3.16 Solenoid Valve for Dehumidification Check Check No.32 Faulty criterion: In dehumidification test operation mode, PCB is identified as a faulty when the solenoid valve does not turn on within 2 seconds after compressor start-up. (When reheating dehumidifying is not used, the operation mode is similar to cooling operation.
Check 154 SiUS04-921 Service Diagnosis
SiUS04-921 Part 7 Removal Procedure 1. Indoor Unit...........................................................................................156 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 Removal of Air Filters / Front panel......................................................156 Removal of Upper Panel ......................................................................163 Removal of Front Grille ........................................................................
Indoor Unit SiUS04-921 1. Indoor Unit 1.1 Removal of Air Filters / Front panel Procedure Step Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. External appearance Room temperature thermistor (R10132) Humidity sensor Multi-colored indicator lamp changes its color according to the operation mode.
SiUS04-921 Indoor Unit Procedure Step Points (R10134) 2 Keep the front panel open with the support plate. 3 Push the center part of the air filter up to undo the 2 hooks. Hooks (R10135) 4 Remove the air filter toward yourself.
Indoor Unit Procedure Step 5 SiUS04-921 Points The shapes of the right and left filters are different. Insert the filters along with the guide for easy installation. (R10137) 3. Remove the deodorizing filter for streamer 1 Pull the center knob to undo the hook. 2 Pull out the deodorizing filter for streamer toward yourself.
SiUS04-921 Indoor Unit Procedure Step 3 Undo the 3 hooks on the longitudinal direction. 4 Slide the filter toward yourself to remove. Points In cleaning, keep the filter with the frame to prevent breaking it.. 4. Removal of the streamer unit 1 Pull down the streamer unit with holding the knob.
Indoor Unit SiUS04-921 Procedure Step Points 5. Removal of the titanium apatite photocatalytic airpurifying filter 1 Undo the projection of the frame of titanium apatite photocatalytic air-purifying filter and remove it. Insert the filters along with the guide for easy installation. (R0070) 2 160 Undo the 4 hooks, open the frame, and remove the titanium apatite photocatalytic air-purifying filter.
SiUS04-921 Indoor Unit Procedure Step Points 6. Removal of the front panel 1 Open the front panel further than the stopping position. (R10139) 2 Push the panel stoppers outward on both right and left sides to detach the rotary shafts from the holes. 3 Slide the rotary shaft on the left to the right and pull it out toward yourself.
Indoor Unit SiUS04-921 Procedure Step 4 Slide the rotary shaft on the right to the left and pull it out toward yourself. 5 Remove the front panel.
SiUS04-921 1.2 Indoor Unit Removal of Upper Panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the service cover 1 Remove the 1 screw (black) of the service cover. 2 Slide the service cover downward to undo the hook on the back side (see the figure below). 3 When assembling, catch the 2 hooks on the far side first, and close the cover.
Indoor Unit SiUS04-921 Procedure Step Points 2. Removal of the upper panel 1 Release the 3 hooks of the upper panel. (R10142) 2 In part A, pinch the upper hook, release the hook, and lift it up. (R10143) 3 164 In part B, release the hook as in part A, and lift it up.
SiUS04-921 Procedure Step 4 Indoor Unit Points In part C, lift the right and left sides to bend the upper panel and slightly pull toward yourself to remove. (R10144) 5 Pull the upper panel toward yourself to remove. Removal Procedure When assembling, make sure to catch the far side hooks.
Indoor Unit 1.3 SiUS04-921 Removal of Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the front grille 1 Remove the 3 screws and undo the upper 3 hooks of the front grille. If the hooks are hard to be undone, use a flat screwdriver. (R10145) 2 You can check the position by the projection when it is hard to see.
SiUS04-921 Procedure Step 3 Indoor Unit Points Slide the front grille toward yourself to remove. 2. How to install the front grille 1 When assembling the front grille, fit the 4 lower hooks and push in until a click is heard. Points on installing When assembling, make sure that the horizontal blade (large) does not come inside. When assembling, follow the same steps for removal in reverse. 3. Features of the gear case 1 There is a gear assembly for opening and closing the front panel.
Indoor Unit Procedure Step 2 SiUS04-921 Points The gear case is fixed to the front grille. When assembling the front grille, make sure the arm is stored. Check that the arm in the gear case of the front grille is in the stored position. (R10147) 3 Installation structure of the gear case. 4 Movement of the arm.
SiUS04-921 1.4 Indoor Unit Removal of Assembly of Open/Close Mechanism Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step 1. Removal of the open/close mechanism (right) 1 Remove the 1 screw of the open/close mechanism (right). Points Preparation Remove the front grille according to "Removal of the Front Grille". When assembling, catch the lower hook first.
Indoor Unit SiUS04-921 Procedure Step Points 2. Removal of the open/close mechanism (left) 1 Pull out the shaft from the open/close mechanism (left). 2 Remove the 2 screws of the open/close mechanism (left). 3 Remove the open/close mechanism (left). 170 Service part is obtained as an assembly kit.
SiUS04-921 1.5 Indoor Unit Removal of Assembly of Reduction Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the assembly of the reduction motor 1 Disconnect the connector for reduction motor [S91] (S51). [S91] (R10148) 2 Remove the 1 screw of the assembly of the reduction motor. The figure above shows the hook on the connector for the assembly of reduction motor.
Indoor Unit Procedure Step 2 Cut the clamp. 3 Slide the cover to the right to undo the hook. 4 Lift the cover of the gear case of the reduction motor up slightly to undo the upper hook, and remove it.
SiUS04-921 Indoor Unit Procedure Step 5 Pull the gear out to remove. Remove the 1 screw of the reduction motor. 6 Turn the assembly over and detach the sealing tape of the reduction motor. 7 Release the 2 hooks of the limit switch. Removal Procedure Points The connector of the reduction motor can be disconnected.
Indoor Unit 1.6 SiUS04-921 Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Disconnect the wire harnesses around the electrical box 1 Open the cover of the electrical box. (R10149) 2 Remove the 4 screws of the terminal board to remove the connection wire. Connection wire (R10150) 3 The figure shows the arrangement of wiring of wire harnesses (front) and names of parts.
SiUS04-921 Procedure Step 4 Indoor Unit Points The figure shows the arrangement of wiring of wire harnesses (under) and names of parts. (R10151) 5 Disconnect the connector for dehumidifying solenoid valve [S43]. 6 Disconnect the connector for streamer unit [S52].
Indoor Unit SiUS04-921 Procedure Step 7 Disconnect the connector for swing motor [S41]. 8 Disconnect the connector for fan motor [S1], and release the 1 hook. Points The connector [S41] is for both horizontal blades and vertical blades.
SiUS04-921 Indoor Unit Procedure Step 9 Remove the screw of the drip proof cover. 10 Remove the screw of the ground wire. 11 Disconnect the heat exchanger thermistor. Points Be careful not to lose the clip for thermistor. 2. Removal of the electrical box 1 Remove the screw of the electrical box.
Indoor Unit SiUS04-921 Procedure Step 2 Close the cover and slide to undo the hook in the key hole. 3 Push up the bottom side of the electrical box, or push the bottom frame to the back. 4 Release the upper hook first. Points (R10156) (R10157) 5 When assembling, insert the upper hook, push slightly, and make sure to catch the lower hook. The shapes of the hook on back side.
SiUS04-921 1.7 Indoor Unit Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the shelter 1 External appearance of the electrical box. Preparation Remove the electrical box according to "Removal of the Electrical Box." (R10160) 2 Release the hook of the cover.
Indoor Unit SiUS04-921 Procedure Step 4 Points Slide the cover upward while lifting up (without being hooked) and undo the 2 sockets. (R10163) 2. Removal of the power supply terminal board 1 Remove the 1 screw and pull out the terminal board sideward. Terminal board (R10164) 2 On the terminal board,disconnect the red terminal with pliers and the black and white terminals with a flat screwdriver. Black ...... (1) Power supply White ...... (2) Power supply Red ........ (3) Signal Green/Yellow ...
SiUS04-921 Procedure Step 2 Indoor Unit Points Release the ground wire from the hook. (R10167) 3 Disconnect the connectors [S46] and [S48]. 4 Push out the connector for reduction motor mechanism while pinching the connector from the back side of the electrical box cover. [S46]: to the display PCB [S56] [S48]: to the sensor PCB [CN1] (R10169) 5 Remove the 2 screws and remove the control PCB.
Indoor Unit Procedure Step 6 SiUS04-921 Points Names of parts of the control PCB. [S1]: Fan motor [S21]: HA [S32]: Heat exchanger thermistor [S41]: Swing motor [S43]: Solenoid valve [S46]: to Display PCB [S48]: to Sensor PCB [S51]: Open/close mechanism [S52]: Streamer unit 4. Removal of the sensor PCB 1 Release the 1 hook and pull out the sensor PCB. 5. Removal of the receiver PCB and the display PCB 1 The arrangement of the wire harnesses. 2 Detach the fixing tape and disconnect the connector.
SiUS04-921 Indoor Unit Procedure Step Points (R10172) 3 Release the upper hook. 4 Release the lower hook. Using a flat screwdriver makes it easy to undo the hook.
Indoor Unit Procedure Step 5 184 SiUS04-921 Release the 2 hooks of the receiver PCB and the 2 hooks of the display PCB. Points The receiver PCB and the display PCB are united.
SiUS04-921 1.8 Indoor Unit Removal of Dehumidifying Solenoid Valve Coil Procedure Warning Procedure Step 1 Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Points Detach the lead wire from the drip proof cover. Preparation Remove the front grille according to "Removal of the Front Grille." Dehumidifying four way valve coil (R10175) 2 Disconnect the connector for dehumidifying solenoid valve [S43].
Indoor Unit 1.9 SiUS04-921 Removal of Drain Hose Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points Cover the drain hose with plastic bags or the like so the remaining drainage will not wet the floor. 1. Removal of the drain hose 1 Remove the screws of the main unit and installation plate. (R10176) 2 Part A is fixed by the screw from back side.
SiUS04-921 Indoor Unit Procedure Step 2 Insert the drain hose removed in the previous step. 3 Insert the detached drain plug with an Allen wrench (4mm). Removal Procedure Points Make sure to check if the drain hose is inserted firmly. Caution Do not push the drain plug with a sharp device like a screwdriver as it can damage the drain plug, resulting in water leakage.
Indoor Unit SiUS04-921 1.10 Removal of Swing Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step 1. Removal of the swing motor for horizontal blade 1 There are 3 hooks for the lead wire for swing motor. Points Preparation Remove the electrical box according to "Removal of the Electrical Box." 2 Cut the clamp with nippers. 3 Undo the lead wire for swing motor from the hooks.
SiUS04-921 Procedure Step 3 Indoor Unit Points Release the upper hook of the cover with a flat screwdriver. The hook on the back of the assembly of swing motor. 4 Release the hook of connecting shaft for vertical blades. 5 Remove the assembly of swing motor. 6 Remove the 2 screws of the swing motor for vertical blades. Removal Procedure When assembling the swing motor for vertical blades, remove the drain hose.
Indoor Unit SiUS04-921 1.11 Removal of Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the refrigerant piping 1 Put a wooden block under the indoor unit and pull out the refrigerant piping, drain hose, connection wirings, and so on. Preparation Remove the drain hose according to "Removal of Drain Hose.
SiUS04-921 Indoor Unit Procedure Step Points When the pipes are disconnected, protect both the pipe side and unit side openings from any moisture entering. 2. Removal of the indoor unit 1 Remove the indoor unit from the installation plate. (R10182) 3. Removal of the heat exchanger 1 Unfasten the hook of the pipe fixing plate at the back of the unit and pull out the pipe. 2 Release the 2 hooks on the side with a flat screwdriver. Widen the auxiliary pipe by about 10-20 degrees.
Indoor Unit Procedure Step 3 Remove the 2 fixing screws for heat exchanger on the left. 4 Lift the left side of the heat exchanger, and pull toward yourself. 5 Release the hook through the gap in the pipes. 6 Slide to right to undo the hook and lift the heat exchanger up. 192 SiUS04-921 Points Caution When dismounting or mounting the heat exchanger, be sure to wear gloves or wrap it with cloth before proceeding with the work as fins can injure your hands.
SiUS04-921 Indoor Unit 1.12 Removal of Propeller Fan / Fan Motor Procedure Warning Procedure Step 1. Removal of the right side panel 1 Remove the 2 screws of the right side panel. 2 Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Points Preparation Remove the heat exchanger according to "Removal of the Heat Exchanger." Release the far side hook of the right side panel while inclining toward yourself and then remove it. 2.
Indoor Unit Procedure Step 3 SiUS04-921 Remove the fan motor and fan rotor. Points The fan motor fixture (lower) can be removed by pushing the hook. 3. Removal of the fan motor 1 Remove the fixing screw for fan rotor and fan motor. 2 Remove the fan motor and fan rotor. 4. Removal of the bearing 1 Remove the fan rotor.
SiUS04-921 Indoor Unit Procedure Step 2 Undo the 1 hook of the bearing. 3 The bearing is made of rubber. Push it inward firmly and remove it. 5. How to install the fan motor 1 When assembling, align the mark on the shaft. Points Reassembling the fan motor: When reassembling the fan rotor, provide as much as 0.2inch (5mm) of play between the side face of the rotor and the bottom frame. Side face of rotor 0.2inch (5mm) Side face of bottom frame (R9869) (R9582) N Insert the fan motor approx. 0.
Indoor Unit SiUS04-921 1.13 Removal of Horizontal Blades / Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the horizontal blade 1 Open the horizontal blade (large). (R10183) 2 Release the center fixture for the horizontal blade (large). When installing the horizontal blades, be careful not to put the large and small blades in the wrong position.
SiUS04-921 Indoor Unit Procedure Step 2. Removal of the fan guard 1 Release the 4 hooks of the fan guard and pull it out toward yourself to remove. Points Fan guard Hooks (R10185) 3. Removal of the interlocking shaft 1 Release the hook of the interlocking shaft. 2 Remove the interlocking shaft.
Indoor Unit SiUS04-921 Procedure Step Points 4. Removal of the vertical blades 1 Release the 3 hooks of the vertical blades with a flat screwdriver. 2 198 Remove the vertical blades.
SiUS04-921 Indoor Unit 1.14 Removal of Streamer Unit Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the streamer unit 1 Names of parts of the streamer unit. (R10187) 2 Open the cover of the electrical box, disconnect the connector for streamer unit [S52], and remove the 1 screw. 3 Release the wire harness for solenoid valve coil from drip proof cover.
Indoor Unit SiUS04-921 Procedure Step 4 Slide the streamer unit to the right side. 5 Remove it toward yourself. Points (R10189) 6 Cut the clamp and remove the 1 screw of the drip proof cover. 2. Removal of the cover of streamer unit 1 Remove the 2 screws of the cover.
SiUS04-921 Procedure Step 2 Indoor Unit Points Turn it back and undo the 7 hooks. 3. Removal of the deodorizing filter and electrode unit 1 Remove the deodorizing filter and electrode unit. 2 Slide the cover of the electrode unit to the left to remove. 3 Electrode for discharging. Removal Procedure See page 158 for removal of the deodorizing filter. When assembling, slide to the right.
Indoor Unit SiUS04-921 Procedure Step Points 4. Removal of the streamer unit PCB 1 Remove the 1 screw of the electrode plate with a precise screwdriver. 2 Release the 2 hooks of the streamer unit PCB. 5. Disconnect the limit switch 1 Disconnect the limit switch.
SiUS04-921 Outdoor Unit 2. Outdoor Unit 2.1 How to Check the Service Monitor (LED A) Procedure Warning Step Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Remove the top panel 1 Remove the 2 screws of the top panel. (R10197) 2. Remove the electrical box (cover). 1 Remove the 1 screw of the electrical box (cover).
Outdoor Unit Procedure Step 2 SiUS04-921 Points Lift the electrical box (cover) and remove it. (R10194) Service monitor (LED A). 3. Remove the drip proof cover 1 Lift the insulation sheet and remove it. Check the LED from the slit.
SiUS04-921 2.2 Outdoor Unit Removal of Propeller Fan / Fan Motor Procedure Warning Step Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Removal of the top panel 1 Remove the 2 screws of the top panel. (R10197) 2. Remove the front panel 1 Remove the 7 screws of the front panel. There are 5 hooks in total of right and left. Lift the front panel and pull it out toward yourself.
Outdoor Unit Procedure Step 2 SiUS04-921 Points Remove the 4 screws to remove the front grille. Front grille (R10198) 3 Remove the 1 screw and remove the stop valve cover. (R10199) 3. Removal of the propeller fan 1 Remove the fan fixing nut and remove the propeller fan. 206 When assembling, align the mark of the propeller fan and D cut of the motor shaft.
SiUS04-921 Outdoor Unit Procedure Step Points When assembling the fan motor, let the mark go upper. (The direction of the lead wire outlet.) Remove the fan fixing nut with the 13mm spanner. 4. Removal of the fan motor 1 Disconnect the fan motor connector [S70] from PCB. [S70] (R10200) 2 Detach the lead wire for fan motor and pass the lead wire downward through the opening.
Outdoor Unit Procedure Step 3 SiUS04-921 Points Remove the 1 screw of the fan motor fixing plate. (R10202) 4 Detach the upper part of the fan motor fixing plate. 5 Fan motor fixing plate has the 2 hooks on lower part.
SiUS04-921 Outdoor Unit Procedure Step 6 Release the fixing hook for lead wire and detach the lead wire. 7 Remove the 4 screws of the fan motor. 8 Pull out the rubber vibration isolators sideward. Points Lead wire Propeller fan (R3249) When assembling, put the lead wire through the back of the motor so as not to be entangled with the propeller fan.
Outdoor Unit 2.3 SiUS04-921 Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step 1. Disconnect the wire harnesses of the PCB 1 Disconnect the connector for fan motor [S70] from the PCB. Points Preparation Remove the front panel according to "Removal of Propeller Fan / Fan Motor." [S70] (R10204) 2 Disconnect the connector for four-way valve coil [S80].
SiUS04-921 Procedure Step 4 Outdoor Unit Disconnect the connector for thermistor assembly [S90]. Points Thermistor assembly is in a set of 3 thermistors: Outdoor air, heat exchanger, and discharge pipe thermistors) [S90] (R10207) 5 Disconnect the terminal from the reactor. Purple Orange (R10208) 6 Disconnect the relay harness for compressor.
Outdoor Unit SiUS04-921 Procedure Step 2. Disconnect the power supply / connecting wiring 1 Remove the 2 screws of the radiation shield plate to remove. Points Radiation shield plate (R10210) 2 Remove the 1 screw of the ground wire. Earth (R10211) 3 Disconnect all the connecting wires.
SiUS04-921 Procedure Step 4 Outdoor Unit Points Black: power supply White: power supply Red: signal Disconnect the connectors: black - power supply white - power supply red - signal (R0147) 5 Undo the clip for the thermistor assembly fixed to the electrical box. 6 Remove the 1 screw in front and 1 screw on the right of the electrical box. The clip is push-mount type. Clip (R10214) (R10215) 7 Lift the electrical box to remove it.
Outdoor Unit 2.4 SiUS04-921 Removal of PCB Procedure Warning Procedure Step 1 Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Points Remove the 1 screw of the electrical box (cover). Lift the electrical (cover) and remove. (R10217) 2 Lift the insulation sheet and remove. (R10218) 3 Remove the 5 screws for the PCB or the radiation fin. Preparation Remove the electrical box according to "Removal of Electrical Box.
SiUS04-921 Procedure Step 4 Outdoor Unit Points In working, be careful not to break the PCB with the excessive force because the PCB and the radiation fin are adhered to one another Remove the radiation fin from the PCB. When assembling, make sure to use the silicon material. Silicon material Part No.: 1172698 (R10220) (R10221) 5 Remove the 2 screws and 1 clip to remove the radiation shield plate.
Outdoor Unit Procedure Step 6 SiUS04-921 Points Cut the 3 fixing clamps for the wire harnesses. (R10223) 7 Remove the 2 fixing screws of the PCB. (R10224) 8 Raise the PCB toward yourself and undo the 3 hooks of the electrical box.
SiUS04-921 Procedure Step 9 Outdoor Unit Points Remove the PCB from the electrical box. (R10226) 10 Names of parts of PCB. LED5(green) S90 S70 S45 S80 S20 Varistor LEDA(green) Fuse . 3.15A 250V Fuse 3.
Outdoor Unit 2.5 SiUS04-921 Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the right side panel 1 Remove the 3 screws on the back side of the right side panel. Preparation Remove the electrical box according to "Removal of Electrical Box." (R10228) 2 Remove the 2 screws on the right and slide the panel to undo the lower hook.
SiUS04-921 Outdoor Unit Procedure Step Points Since the piping ports on the sound blanket are torn easily, remove the blanket carefully. 2. Removal of the sound blanket 1 Lift the sound blanket (top) to remove it. (R10230) 2 Undo the fixing strings of the sound blanket (outer body). (R10231) 3 Open the sound blanket (outer body) and pull it out. 4 Open the sound blanket (inner body) and pull it out. Since the piping ports on the sound blanket are torn easily, remove the blanket carefully.
Outdoor Unit 2.6 SiUS04-921 Removal of Thermistor Assembly Procedure Warning Procedure Step 1 Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. The figure shows the arrangement of the thermistors. Points Heat exchanger thermistor Discharge pipe thermistor 2 Preparation Remove the thermistor assembly according to "Removal of Electrical Box.
SiUS04-921 Procedure Step 4 Outdoor Unit Points Detach the heat exchanger thermistor. (R10237) Be careful not to loosen the clip for the thermistor. 5 Since the piping ports on the sound blanket are torn easily, remove the blanket carefully. Lift the sound blanket (top) to remove it. (R10238) 6 Detach the discharge pipe thermistor while opening the thermistor fixing clip. Detach the discharge pipe thermistor. Be careful not to loosen the fixing clip for the discharge pipe thermistor.
Outdoor Unit 2.7 SiUS04-921 Removal of Reactor / Partition Plate Procedure Warning Step Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Removal of the reactor 1 Remove the 1 screw and lift the reactor to remove it. Preparation Remove the sound blanket according to "Removal of Sound Blanket." (R10239) The reactor can be detached by removing only 1 screw. (R10240) 2.
SiUS04-921 Step Outdoor Unit Procedure Points When assembling, make sure to catch the lower hook of the partition plate.
Outdoor Unit 2.8 SiUS04-921 Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the peripheral parts 1 Remove the 1 screw of the four-way valve coil. Preparation Remove the sound blanket according to "Removal of Sound Blanket." Four way valve coil (R10242) 2 Remove the expansion valve coil. 3 Remove the putty.
SiUS04-921 Procedure Step Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries. Before working, make sure that the refrigerant is empty in the circuit. Be sure to apply nitrogen replacement when heating up the brazed part. 2. Removal of four-way valve 1 Heat up the 4 brazed parts of the four-way valve. Remove it in the order of , , , . 2 Outdoor Unit Heat up the brazed part and pull out the piping side with pliers.
Outdoor Unit 2.9 SiUS04-921 Removal of the Expansion Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Remove the peripheral parts • Four-way valve coil • Expansion valve coil • Putty and so on so as not to be damaged by the brazing flame. 1 Remove the four-way valve coil. 2 Preparation Remove the sound blanket according to "Removal of Sound Blanket.
SiUS04-921 Step Before working, make sure that the refrigerant is empty in the circuit. Be sure to apply nitrogen replacement when heating up the brazed part. 2. Remove the expansion valve. 1 Remove the 2 brazed parts in the order of , . Removal Procedure Outdoor Unit Procedure Points Be careful so as not to burn the heat exchanger fin. When assembling, make sure to catch the hook of the expansion valve coil as before.
Outdoor Unit SiUS04-921 2.10 Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Step Points 1. Removal of the peripheral parts 1 Remove the terminal cover. Preparation Remove the sound blanket according to "Removal of Sound Blanket". (R10246) 2 Be careful so as not to burn the compressor terminals or the name plate. Detach the lead wires for compressor and overload protector. Make a note.
SiUS04-921 Outdoor Unit Procedure Step Points Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries. Warning Ventilate when refrigerant leaks during the work . If refrigerant contacts fire, it will cause toxic gas. Before working, make sure that the refrigerant is empty in the circuit. Caution Be careful not to burn yourself with the pipes and other parts that are heated by the gas welding rod.
Outdoor Unit 230 SiUS04-921 Removal Procedure
SiUS04-921 Part 8 Additional Information 1. Additional Information ........................................................................232 1.1 Trial Operation......................................................................................232 1.2 Field Setting .........................................................................................233 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..........................................................................
Additional Information SiUS04-921 1. Additional Information 1.1 Trial Operation 1.1.1 Trial Operation and Testing 1. 2. 3. For Heat pump Measure the supply voltage and make sure that it falls in the specified range. Trial operation should be carried out in either cooling or heating mode. Operate the unit in accordance with the operation manual to check that it operates normally. Even when the air conditioner is not operating, it consumes some electric power.
SiUS04-921 1.2 Additional Information Field Setting 1.2.1 How to set the different addresses When 2 indoor units are installed in 1 room, the 2 wireless remote controllers can be set for different addresses. 1) Remove the front grille. (3 screws) 2) Cut the address jumper “JA”. (See Fig. 1) Electric parts box cover Fig. 1 Cut JA. 3) Remove the remote controller lid and cut the address jumper “J4”. (See Fig. 2) Fig. 2 Cut section J4 (R10192) 1.2.
Additional Information 1.3 SiUS04-921 Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable Models All outdoor units using inverter type compressor for room air conditioner. When the printed circuit board of an outdoor unit is replaced, it is required that silicon grease (*1) is applied to the heat radiation part (the contact point to the heat radiation fin) of the power transistor and diode bridge.
SiUS04-921 Part 9 Appendix 1. Piping Diagrams..................................................................................236 1.1 Indoor Units ..........................................................................................236 1.2 Outdoor Units .......................................................................................236 2. Wiring Diagrams..................................................................................237 2.1 Indoor Units ......................................
Piping Diagrams SiUS04-921 1. Piping Diagrams 1.1 Indoor Units FTXG09/12/15HVJU INDOOR UNIT 1/4(6.4)CuT SV SV HEAT EXCHANGER THERMISTOR ON HEAT EXCH. SOLENOID VALVE AT RATED VOLTAGE: CLOSED (UNDER DEHUMIDIFICATION OPERATION) CROSS FLOW FAN M HEAT EXCHANGER FAN MOTOR FIELD PIPING 1/ 4(6.4)CuT SINGLE UNION JOINT FIELD PIPING 3/8(9.5)CuT 3/8(9.5)CuT SINGLE UNION JOINT REFRIGERANT FLOW COOLING HEATING 4D061001 1.2 Outdoor Units RXG09/12/15HVJU 9/32(7.0)CuT HEAT EXCHANGER 9/32(7.
SiUS04-921 Wiring Diagrams 2. Wiring Diagrams 2.1 Indoor Units FTXG09/12/15HVJU : PRINTED CIRCUIT BOARD : FLAME GROUND : FUSE : MULTI MONITOR : PILOT LAMP : LIMIT SWITCH FOR PANEL : LIMIT SWITCH FOR STREAMER : FAN MOTOR : SWING MOTOR : THERMISTOR : VARISTOR : CONNECTOR : OPERATION SWITCH : TERMINAL STRIP : SOLENOID VALVE : FERRITE CORE : PROTECTIVE GROUND CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
Wiring Diagrams 238 SiUS04-921 Appendix
SiUS04-921 Index Symbols "inverter checker" check........................................145 "sarara" drying operation...................................14, 73 Numerics 1/f fluctuation...........................................................20 24-hour on/off timer.................................................30 3-d airflow................................................................22 A a1 ............................................................................96 a5 ..........................
SiUS04-921 diagnosis mode .......................................................32 different addresses................................................233 diode bridge ..........................................................234 discharge pipe temperature control.................45, 117 discharge pipe thermistor..............................124, 221 discharge pressure check .....................................147 discharge temperature, abnormally high.................52 display pcb ......................
SiUS04-921 h9 ..........................................................................124 ha ..............................................................................8 hall ic .......................................................................99 heat exchanger (indoor) ........................................190 heating operation ....................................................74 high pressure control...............................................97 high pressure control in cooling .........
SiUS04-921 radiation fin....................................................128, 215 radiation fin thermistor...........................................124 reactor ...........................................................211, 222 receiver pcb...........................................................182 reduction motor .....................................................171 refrigerant system check .......................................144 reheating dehumidifying method .............................
Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the world. Daikin Industries, Ltd. does not have control over which products are exported to and used in a particular country. Prior to purchase, please therefore confirm with your local authorized importer, distributor and/or retailer whether this product conforms tot he applicable standards, and is suitable for use, in the region where the product will be used.
