SiUS071735E Service Manual Inverter Pair Duct Connected Type FDMQ-R Series [Applied Models] z Inverter Pair : Heat Pump
SiUS071735E Inverter Pair Duct Connected Type FDMQ-R Series zHeat Pump Indoor Unit FDMQ09RVJU FDMQ12RVJU FDMQ15RVJU FDMQ18RVJU FDMQ24RVJU Outdoor Unit RX09RMVJU RX12RMVJU RX15RMVJU RX18RMVJU RX24RMVJU i Table of Contents
SiUS071735E 1. Safety Cautions........................................................................................... v 1.1 Warnings and Cautions Regarding Safety of Workers................................. v 1.2 Warnings and Cautions Regarding Safety of Users.................................... vii 2. Icons Used .................................................................................................. x Part 1 List of Functions ................................................................
SiUS071735E 2.9 2.10 2.11 2.12 Liquid Compression Protection Function.................................................... 37 Defrost Control ........................................................................................... 38 Electronic Expansion Valve Control ........................................................... 39 Malfunctions ............................................................................................... 42 Part 5 Remote Controller ......................................
SiUS071735E 4.26 Electrical Box Temperature Rise................................................................ 95 4.27 Radiation Fin Temperature Rise ................................................................ 96 4.28 Output Overcurrent Detection .................................................................... 97 5. Check ........................................................................................................99 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.
Safety Cautions SiUS071735E 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer. This manual is for the person in charge of maintenance and inspection. Caution Items Pictograms 1.1 The caution items are classified into Warning and Caution.
SiUS071735E Safety Cautions Warning Be sure to discharge the capacitor completely before conducting repair work. The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit. A charged capacitor may cause an electrical shock. Do not turn the air conditioner on or off by plugging in or unplugging the power cable. Plugging in or unplugging the power cable to operate the equipment may cause an electrical shock or fire.
Safety Cautions SiUS071735E Caution Be sure to conduct repair work with appropriate tools. The use of inappropriate tools may cause injury. Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work. Working on the unit when the refrigerating cycle section is hot may cause burns. Conduct welding work in a well-ventilated place. Using a welder in an enclosed room may cause oxygen deficiency. 1.
SiUS071735E Safety Cautions Warning Be sure to use the specified cable for wiring between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections may cause excessive heat generation or fire. When wiring between the indoor and outdoor units, make sure that the terminal cover does not lift off or dismount because of the cable.
Safety Cautions SiUS071735E Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks. Do not install the equipment in a place where there is a possibility of combustible gas leaks. If combustible gas leaks and remains around the unit, it may cause a fire. Check to see if parts and wires are mounted and connected properly, and if connections at the soldered or crimped terminals are secure.
SiUS071735E Icons Used 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Information Warning Description Caution A Caution is used when there is danger that the reader, through incorrect manipulation, may damage equipment, lose data, get an unexpected result or have to restart (part of) a procedure. Note A Note provides information that is not indispensable, but may nevertheless be valuable to the reader, such as tips and tricks.
SiUS071735E Part 1 List of Functions 1. Functions.....................................................................................................
SiUS071735E Functions Comfortable Airflow Comfort Control Lifestyle Convenience z z z — — z — z — Power-airflow dual flaps (horizontal blade) — — Power-airflow diffuser Wide-angle louvers (vertical blades) Auto-swing (up and down) Auto-swing (right and left) Individual flap control 3-D airflow COMFORT AIRFLOW operation Switchable fan speed (3 steps) — — — — — — — z — — — — — — — z Auto fan speed Indoor unit quiet operation NIGHT QUIET mode (automatic) OUTDOOR UNIT QUIET operation (manual) 2 se
SiUS071735E Part 2 Specifications 1. Specifications ..............................................................................................
SiUS071735E Specifications 1.
Specifications SiUS071735E 60 Hz, 208 - 230V Indoor Unit Model Outdoor Unit Power Supply Cooling capactity 1 4 Heating capactity 2 4 Heating capactity 3 4 SEER/HSPF COP (Rated) EER (Rated) Indoor Unit Casing Color Dimensions (H × W × D) Coil Fan Sound Pressure Level Sound Power Level Air Filter 6 Weight (Mass) Piping Connections Remote Controller (Option) Outdoor Unit Casing Color Dimensions (H × W × D) Coil Compressor Fan Sound Pressure Level Sound Power Level Weight (Mass) Piping Connecti
SiUS071735E Specifications 60 Hz, 208 - 230V Indoor Unit Model FDMQ24RVJU RX24RMVJU Outdoor Unit Cooling Power Supply Cooling capactity 1 4 Heating capactity 2 4 Heating capactity 3 4 SEER/HSPF COP (Rated) EER (Rated) Indoor Unit Casing Color Dimensions (H × W × D) Coil Fan Sound Pressure Level Sound Power Level Air Filter 6 Weight (Mass) Piping Connections Remote Controller (Option) Outdoor Unit Casing Color Dimensions (H × W × D) Coil Compressor Fan Sound Pressure Level Sound Power Leve
SiUS071735E Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit...................................................................................................8 1.1 FDMQ09/12/15/18/24RVJU ......................................................................... 8 2. Wired Remote Controller...........................................................................10 2.1 BRC1E73 ................................................................................................... 10 3.
SiUS071735E Indoor Unit 1. Indoor Unit 1.
Indoor Unit Indoor Fan PCB (A2P) SiUS071735E 1) 2) 3) 4) 5) 6) 7) X3A X6A X8A X10A F2U F4U HAP Connector for control PCB (A1P) Connector for reactor Connector for indoor fan motor Connector for terminal block (for power supply) Fuse (5 A, 250 V) Fuse (6.
SiUS071735E Wired Remote Controller 2. Wired Remote Controller 2.
Wireless Remote Controller Receiver SiUS071735E 3. Wireless Remote Controller Receiver 3.1 BRC082A43 Wireless Remote Controller PCB 1) SS1 2) SS2 3) P1, P2 MAIN/SUB setting switch ∗ Refer to page 121 for details. Address setting switch ∗ Refer to page 121 for details.
SiUS071735E Outdoor Unit 4. Outdoor Unit 4.
Outdoor Unit 4.2 SiUS071735E RX15/18/24RMVJU Main PCB 1) 2) 3) 4) 5) S20 S40 S70 S80 S90 6) HL1, HN1, S 7) E1, E2 8) U, V, W 9) FU1, FU2 10)FU3 11)J6 12)LED A 13)V1, V2, V3 Connector for electronic expansion valve coil Connector for overload protector Connector for DC fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) Connector for terminal block Terminal for ground Connector for compressor Fuse (3.
SiUS071735E Part 4 Functions and Control 1. Main Functions..........................................................................................15 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Temperature Control .................................................................................. 15 Frequency Principle.................................................................................... 15 Fan Speed Control for Indoor Unit .............................................................
Main Functions SiUS071735E 1. Main Functions 1.1 Temperature Control Definitions of Temperatures The definitions of temperatures are classified as following.
SiUS071735E Main Functions The following drawing shows a schematic view of the inverter principle: Refrigerant circulation rate (high) DC power Amount of heat exchanged air (small) high speed AC power Amount of heat exchanged air (large) high f low f low speed 50 Hz freq= constant 60 Hz freq=variable Amount of heat exchanged air (large) Amount of heat exchanged air (small) capacity= variable Refrigerant circulation rate (low) (R2812) Inverter Features The inverter provides the following featur
Main Functions 1.3 SiUS071735E Fan Speed Control for Indoor Unit With Wired Remote Controller (BRC1E73) To change the fan speed, press Fan Speed button and select the fan speed from Low/Medium/High/Auto. Auto cannot be selected if the indoor unit does not have Auto Fan speed function. The system may change the fan speed automatically for equipment protection purposes. The system may turn off the fan when the room temperature is satisfied.
SiUS071735E 1.4 Main Functions Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable. Details The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones.
Main Functions 1.5 SiUS071735E Clock and Calendar Setting (With Wired Remote Controller BRC1E73) 1 2 3 4 5 Press Menu/OK button to display the main menu screen. Press buttons to select Clock & Calendar on the main menu screen. Press Menu/OK button to display the clock & calendar screen. Press buttons to select Date & Time on the clock & calendar screen. Press Menu/OK button to display the date & time screen. Select Year with buttons. Change the year with buttons.
SiUS071735E Main Functions 6 7 Select Hour with buttons. Change the hour with buttons. Holding down the button causes the number to change continuously. Select Minute with buttons. Change the minute with buttons. Holding down the button causes the number to change continuously. Press Menu/OK button. The confirmation screen will appear. Note: The date can be set between January 1, 2015 and December 31, 2099. 8 Press button to select Yes on the confirmation screen.
Main Functions 1.6 Outline SiUS071735E Schedule TIMER Operation (With Wired Remote Controller BRC1E73) Day settings are selected from 4 patterns: 7 Days Weekday/Sat/Sun Weekday/Weekend Everyday Up to 5 actions can be set for each day. Details Set the startup time and operation stop time. ON: Startup time, cooling and heating temperature setpoints can be configured. OFF: Operation stop time, cooling and heating setback temperature setpoints can be configured.
SiUS071735E Main Functions Daily Patterns 1 2 3 The schedule screen will appear. Press buttons to select Daily Patterns on the schedule screen. The daily patterns screen will appear when Menu/OK button is pressed. Press buttons to select 7 Days , Weekday/Sat/Sun , Weekday/Weekend or Everyday on the daily patterns screen. The confirmation screen will appear when Menu/OK button is pressed. Press buttons to select Yes on the confirmation screen.
Main Functions SiUS071735E 4 Press buttons to move the highlighted item and press buttons to configure ON/OFF/-- settings. --, ON, or OFF changes in sequence when buttons are pressed. ON: The temperature setpoints can be configured. OFF: The setback temperature setpoints can be configured. – –: The temperature setpoints and setback temperature setpoints become disabled. The cooling and heating temperature setpoints for both ON and OFF (Setback) are configured.
SiUS071735E Main Functions Enabling or disabling the schedule 1 Display the schedule screen. Press buttons to select Enable / Disable on the schedule screen. Press Menu/OK button to display the enable/disable screen. 2 Press buttons to select Enable or Disable on the enable/disable screen. Press Menu/OK button after selecting the item. The confirmation screen is displayed. 3 Press buttons to select Yes on the confirmation screen.
Main Functions SiUS071735E 1.7.2 If the Float Switch is OFF with the Thermostat ON in Cooling Operation ∗2 ∗3 ∗1 ∗4 OFF Float switch ON 5 sec. 5 sec. Thermostat ON (running) OFF Error display A3 ON OFF Drain pump ON OFF 5 min. 5 sec. 5 min. 5 sec. 5 min. 5 sec. (R24610) When the float switch stays OFF for 5 sec., the thermostat turns OFF. After the thermostat turns OFF, the drain pump continues to operate for another 5 minutes.
SiUS071735E Main Functions 1.7.4 If the Float Switch Turns OFF and ON Continuously, or the Float Switch Turns OFF While AF Displayed ∗1 OFF Float Switch Thermostat (running) ∗2 1st 4th 5th 5 sec. 5 sec. 5 sec. ON ON 5 sec. 5 sec. OFF AF ON Error Display ∗3 A3 OFF ON Drain Pump OFF 5 min. 5 min. 5 min. 5 sec. 5 min. 5 sec. 5 min. 5 min. 5 min. 5 sec. 5 min. 5 sec. 5 min. 5 min. 5 sec. 5 sec. (R24370) When the float switch stays OFF for 5 sec., the drain pump turns ON.
Main Functions 1.9 SiUS071735E Other Functions 1.9.1 Signal Receiving Sign When the indoor unit receives a signal from the remote controller, the unit emits a signal receiving sound. 1.9.2 Auto-restart Function If a power failure (even a momentary one) occurs during the operation, the system restarts automatically in the same conditions as before when the power supply is restored to the conditions prior to the power failure.
SiUS071735E Control Specification 2. Control Specification 2.1 Mode Hierarchy Outline The air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing.
Control Specification 2.2 Outline SiUS071735E Frequency Control The compressor frequency is determined according to the difference between the room thermistor temperature and the target temperature. When the shift of the frequency is less than zero (∆F<0) by PI control, the target frequency is used as the command frequency. Dropping function Input current control, etc.
SiUS071735E Initial Frequency Control Specification When starting the compressor, the frequency is initialized according to the ∆D value of the indoor unit. ∆D signal: Indoor frequency command The difference between the room thermistor temperature and the target temperature is taken as the ∆D value and is used for ∆D signal of frequency command. ∆D signal for cooling Temperature ∆D difference signal –2.0°C (–3.6°F) ∗OFF Temperature difference 0°C (0°F) ∆D signal 4 Temperature difference 2.0°C (3.
Control Specification 2.3 SiUS071735E Controls at Mode Changing/Start-up 2.3.1 Preheating Control Outline The inverter operation in open phase starts with the conditions of the outdoor temperature, the discharge pipe temperature, the radiation fin temperature and the preheating command from the indoor unit. Details Outdoor temperature ≥ –2.5°C (27.5°F) → Control A (preheating for normal state) Outdoor temperature < –2.5°C (27.
SiUS071735E Control Specification 2.3.3 Four Way Valve Operation Compensation Outline At the beginning of operation as the four way valve is switched, the pressure difference to activate the four way valve is acquired when the output frequency is higher than a certain fixed frequency, for a certain fixed time. Details Starting Conditions 1. When the compressor starts and the four way valve switches from OFF to ON 2. When the four way valve switches from ON to OFF during operation 3.
Control Specification 2.4 Outline SiUS071735E Discharge Pipe Temperature Control The discharge pipe temperature is used as the internal temperature of the compressor. If the discharge pipe temperature rises above a certain level, the upper limit of frequency is set to keep the discharge pipe temperature from rising further. Details Stop zone A B Dropping zone C Keep zone D Up zone Reset zone Discharge pipe temperature 09/12 class (°C) (°F) 15/18/24 class (°C) (°F) A B 110 103 230.0 217.
SiUS071735E 2.5 Control Specification Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit based on the input current. In case of heat pump models, this control is the upper limit control of frequency and takes priority over the lower limit control of four way valve operation compensation.
Control Specification 2.6 SiUS071735E Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit determines the frequency upper limit and prevents the indoor heat exchanger from freezing. Details When the freeze-up protection control starts, the compressor stops, the airflow rate is fixed to L tap, and the drain pump turns ON. Conditions for starting and ending are as below.
SiUS071735E 2.7 Control Specification Heating Peak-cut Control During heating operation, the indoor heat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure. The operating frequency limitation is judged with the indoor heat exchanger temperature. Stop zone A B Dropping zone C Keep zone D Up zone Reset zone Indoor heat exchanger temperature 09/12 class (R23928) 15 class 18 class 24 class A (°C) 57.5 (°F) 135.5 (°C) 60 (°F) 140.
Control Specification 2.8 SiUS071735E Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF during defrosting. 3. Fan OFF delay when stopped The outdoor fan is turned OFF 60 ~ 70 seconds after the compressor stops. 4.
SiUS071735E Control Specification 2.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish defrosting. Details Conditions for Starting Defrost The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature. The system is in heating operation. The compressor operates for 6 minutes.
Control Specification SiUS071735E 2.11 Electronic Expansion Valve Control During defrost control Frequency change under discharge pipe thermistor disconnection control Operation start Control Power on ; Compressor stop Status Discharge pipe thermistor disconnection The following are the examples of electronic expansion valve control which function in each operation mode.
SiUS071735E Control Specification 2.11.1 Initialization as Power Supply On The electronic expansion valve is initialized (fully closed) when the power is turned on. Then, the valve opening is set and the pressure is equalized. 2.11.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens and the pressure is equalized. 2.11.
Control Specification SiUS071735E 2. When the operation mode is heating When the following condition is fulfilled, the discharge pipe thermistor disconnection is ascertained. Discharge pipe temperature +6°C (+10.8°F) < indoor heat exchanger temperature A (seconds) 09/12 class 720 15/18/24 class 540 When the thermistor is disconnected When the disconnection is ascertained, the compressor continues operation for 9 minutes and then stops. If the compressor stops repeatedly, the system is shut down. 2.11.
SiUS071735E Control Specification 2.12 Malfunctions 2.12.1 Sensor Malfunction Detection Sensor malfunction can be detected in the following thermistor: 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Outdoor temperature thermistor 2.12.2 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed to protect the compressor.
SiUS071735E Part 5 Remote Controller 1. Wired Remote Controller (BRC1E73) .......................................................44 2. Wireless Remote Controller (BRC082A43)...............................................
SiUS071735E Wired Remote Controller (BRC1E73) 1. Wired Remote Controller (BRC1E73) 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2.
Wired Remote Controller (BRC1E73) 1. Operation mode selector button • Press this button to select the operation mode of your preference. * Available modes vary with the indoor unit model. 2. Fan speed control button • Press this button to select the fan speed of your preference. * Available fan speeds vary with the indoor unit model. 3. Menu/OK button • Used to enter the main menu. • Used to enter the selected item. 4. Up button • Used to raise the setpoint.
SiUS071735E Wired Remote Controller (BRC1E73) Liquid Crystal Display • Three types of display mode (Standard, Detailed and Simple) are available. • Standard display is set by default. • Detailed and Simple displays can be selected in the main menu. Standard display 10.Changeover controlled by the master indoor unit 9.Under centralized control 11.Setback 8.( ) Scheduled 7.( 1.Operation mode ) Key Lock 3.Setpoint 2.Fan Speed 6.Ventilation 4.Stand by for Defrost/ Hot start 5.
Wired Remote Controller (BRC1E73) SiUS071735E Simple display 1.Operation mode 14.Selectable Display Item 3.Setpoint 11.Setback 2.Fan speed 4.Stand by for Defrost/ Hot start Note for all display modes • Depending on the field settings, while the indoor unit is stopped, OFF may be displayed instead of the operation mode and/or the setpoint may not be displayed.
SiUS071735E Wired Remote Controller (BRC1E73) “Error: Push Menu button” “Warning: Push Menu button” • Displayed if an error or warning is detected. 1. Operation mode • Used to display the current operation mode: Cool, Heat, Vent, Fan, Dry or Auto. • In Auto mode, the actual operation mode (Cool or Heat) will be also displayed. • Operation mode cannot be changed when OFF is displayed. Operation mode can be changed after starting operation.
Wired Remote Controller (BRC1E73) 11. Setback “ SiUS071735E ” • The setback icon flashes when the unit is turned on by the setback control. 12. Airflow Direction “ ” • Displayed when the airflow direction and swing are set. • If the connected indoor unit model does not include oscillating louvers this item will not be displayed. 13. Current Day/Time (12/24 hour time display) • Displayed if the clock is set. • If the clock is not set, “ -- : -- ” will be displayed.
SiUS071735E Wireless Remote Controller (BRC082A43) 2. Wireless Remote Controller (BRC082A43) 1 ON OFF 3 ON OFF 7 TEMP H M L DOWN 9 H M F L TIME UP UP 5 10 F FAN DOWN FAN 4 8 hr. 2 12 RESERVE CANCEL hr. hr. TIMER 11 MODE 13 hr.
Wireless Remote Controller (BRC082A43) 1 2 SiUS071735E DISPLAY “ ” “ I ” (SIGNAL TRANSMISSION) This lights up when a signal is being transmitted. 11 DISPLAY “ ”“ ”“ (OPERATION MODE) 12 ”“ ”“ ” This display shows the current OPERATION MODE. 3 DISPLAY “ H M L ” (SET TEMPERATURE) F This display shows the set temperature. DISPLAY “ hr. hr. This display shows PROGRAMMED TIME of the system start or stop.
SiUS071735E Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items .........................................54 2. Troubleshooting with LED .........................................................................55 2.1 Indoor Unit.................................................................................................. 55 2.2 Outdoor Unit ............................................................................................... 55 3. Service Diagnosis ...........................
SiUS071735E 5. Check ........................................................................................................99 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 53 Thermistor Resistance Check .................................................................... 99 Indoor Fan Motor Connector Check ......................................................... 100 Power Supply Waveforms Check .............................................................
SiUS071735E General Problem Symptoms and Check Items 1. General Problem Symptoms and Check Items Symptom Check Item The unit does not operate. Check the power supply. Check the type of the indoor unit. Check the outdoor temperature. Details Check if the rated voltage is supplied. Check if the indoor unit type is compatible with the outdoor unit. Heating/cooling operations are not available when the outdoor temperature is out of the operation limit. Check the reference page for the operation limit.
Troubleshooting with LED SiUS071735E 2. Troubleshooting with LED 2.1 Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions. 2. When a signal transmission error occurs between the indoor and outdoor units. In either case, conduct the diagnostic procedure described in the following pages.
SiUS071735E Service Diagnosis 3. Service Diagnosis 3.1 Wired Remote Controller (BRC1E73) Relations Between Modes On power-up, the message “Checking the connection. Please standby.” will be displayed on the remote controller screen temporarily and then the basic screen will be displayed. To access a mode from the basic screen, refer to the figure below. When any of the operation buttons is pressed, the backlight will come on and remain lit for about 30 seconds.
Service Diagnosis Service Diagnosis SiUS071735E The following message is displayed on the screen when an error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp Menu/OK button (R18817) Operation 1 Cool If an error occurs, either one of the following items will flash in the basic screen. Set to 74 Error : Push Menu butto n F Error: Push Menu button * The Operation lamp will flash.
SiUS071735E 3.2 Service Diagnosis Wireless Remote Controller (BRC082A43) Relations Between Modes The following modes can be selected by using INSPECTION/TEST OPERATION button on the remote controller. Indoor unit settings can be made. z Filter cleaning sign time Field z Others setting mode Press INSPECTION/TEST OPERATION button for more than 4 seconds. Service mode Press INSPECTION/TEST OPERATION button once. Press INSPECTION/TEST OPERATION button for more than 4 seconds.
Service Diagnosis SiUS071735E Step 2 Action Press UP or DOWN button and change the UNIT No. until the indoor unit starts to beep. UP button DOWN button (R15408) 3 If you hear... Then... 3 short beeps 1 short beep Follow all steps below. Follow steps 3 and 4. Continue the operation in step 4 until you hear a long beep. This long beep indicates that the error code is confirmed. 1 long beep There is no abnormality. Press OPERATION MODE SELECTOR button.
SiUS071735E Service Diagnosis Step 4 Action Press UP or DOWN button to change the error code upper digit until the indoor unit beeps. DOWN 4 5 6 7 8 9 U P L J F H E C A 0 UP button DOWN button UP (R15411) 5 If you hear... 2 short beeps Then... The upper digit matches. 1 short beep 1 long beep No digits match. Both upper and lower digits match. Press OPERATION MODE SELECTOR button. The right 0 (lower digit) indication of the error code blinks.
Service Diagnosis SiUS071735E Step 6 Action Press UP or DOWN button and change the error code lower digit until the indoor unit generates long beep. DOWN F E J C H A 9 8 7 6 5 4 3 2 1 0 UP button DOWN button UP (R15413) 7 If you hear... Then... 2 short beeps 1 long beep No digits match. Both upper and lower digits match. Press OPERATION MODE SELECTOR button to return to the normal mode. If you do not press any button for 1 minute, the remote controller automatically returns to the normal mode.
SiUS071735E Troubleshooting 4. Troubleshooting 4.
Troubleshooting 4.2 SiUS071735E Indoor Unit PCB Abnormality Error Code A1 Method of Error Detection The system checks the data from EEPROM. Error Decision Conditions The data from the EEPROM is not received correctly. EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds its content without power. It can be erased, either within the computer or externally and usually requires more voltage for erasure than the common +5 volts used in logic circuits.
SiUS071735E 4.3 Troubleshooting Drain Level Control System Abnormality Error Code A3 Method of Error Detection The float switch detects error. Error Decision Conditions The water level reaches its upper limit and the float switch turns OFF.
Troubleshooting 4.4 SiUS071735E Indoor Fan Motor (DC Motor) or Related Abnormality Error Code A6 Method of Error Detection Detection from the current flow on the fan PCB Detection from the rotation speed of the fan motor in operation Error Decision Conditions The rotation speed is less than a certain level for 6 seconds.
SiUS071735E Troubleshooting A The HAP lamp on the indoor unit control PCB is blinking while the HAP lamp on the fan PCB is not blinking. YES NO Turn OFF the power supply and wait for 10 minutes. Turn OFF the power supply and wait for 10 minutes. Check No.02 Check the fan motor connectors. Each resistance between the pins is equal to or lower than 1 Ω. YES Replace the fan motor. Replace the fan PCB (A2P). NO Replace the fan PCB (A2P). ↓ When A6 abnormality still reoccurs, replace the fan motor.
Troubleshooting 4.5 SiUS071735E Indoor Fan PCB Abnormality Error Code A8 Method of Error Detection Microcomputer checks the voltage state of the fan PCB. Error Decision Conditions Overvoltage or voltage drop is detected on the fan PCB. Supposed Causes Defective fan PCB External factor such as noise Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
SiUS071735E 4.6 Troubleshooting Humidifier or Related Abnormality Error Code AF Method of Error Detection Water leakage from humidifier(s) is detected based on the float switch ON/OFF changeover while the system is not operating. Error Decision Conditions The float switch changes from ON to OFF while the system is OFF.
Troubleshooting 4.7 SiUS071735E Thermistor or Related Abnormality C4, C5, C9 Error Code Method of Error Detection The temperatures detected by the thermistors determine thermistor errors. Error Decision Conditions The thermistor is disconnected or shorted while the unit is running. Supposed Causes Troubleshooting If the cause of the problem is related to the thermistors, the thermistors should be checked prior to changing the indoor unit PCB. Check No.01 Refer to P.
SiUS071735E 4.8 Troubleshooting Remote Controller Thermistor Abnormality CJ Error Code Method of Error Detection Even if remote controller thermistor is faulty, system is possible to operate by system thermistor. Malfunction detection is carried out by the temperature detected by the remote controller thermistor. Error Decision Conditions The remote controller thermistor is disconnected or shorted while the unit is running.
Troubleshooting 4.9 SiUS071735E Signal Transmission Error (Between Indoor Unit and Remote Controller) Error Code U5 Method of Error Detection In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer if signal transmission between indoor unit and remote controller (main and sub) is normal. Error Decision Conditions Normal transmission does not continue for specified period.
SiUS071735E Troubleshooting 4.10 Signal Transmission Error (Between MAIN Remote Controller and SUB Remote Controller) Error Code U8 Method of Error Detection In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer if signal transmission between MAIN remote controller and SUB remote controller is normal. Error Decision Conditions Normal transmission does not continue for specified period.
Troubleshooting SiUS071735E 4.11 Low-voltage Detection or Over-voltage Detection Error Code U2 Method of Error Detection Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit. Error Decision Conditions Low-voltage detection: The voltage detected by the DC voltage detection circuit is below 180 ~ 196 V (depending on the model).
SiUS071735E Troubleshooting Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the connection of the compressor harness. Loose or disconnected? YES Reconnect the harness. NO Does the outdoor fan rotate smoothly? NO Replace the outdoor fan motor and the outdoor unit PCB (main PCB).
Troubleshooting SiUS071735E 4.12 Signal Transmission Error (Between Indoor Unit and Outdoor Unit) Error Code U4 Method of Error Detection The signal transmission data from the outdoor unit is checked whether it is normal. Error Decision Conditions The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.
SiUS071735E Troubleshooting Troubleshooting Caution Check No.11 Refer to P.100 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the connection wires between the indoor unit and the outdoor unit. Is there any wiring error? YES NO Correct the connection wires between the indoor unit and the outdoor unit.
Troubleshooting SiUS071735E 4.
SiUS071735E Troubleshooting 4.14 Outdoor Unit PCB Abnormality Error Code E1 Method of Error Detection The system checks if the microprocessor is working in order. The system checks if the zero-cross signal comes in properly. Error Decision Conditions The microprocessor program runs out of control. The zero-cross signal is not detected.
Troubleshooting SiUS071735E 4.15 OL Activation (Compressor Overload) Error Code E5 Method of Error Detection A compressor overload is detected through compressor OL. Error Decision Conditions If the error repeats, the system is shut down.
SiUS071735E Troubleshooting Troubleshooting Caution Check No.01 Refer to P.99 Check No.12 Refer to P.101 Check No.13 Refer to P.102 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Discharge pipe thermistor disconnected? Insert the thermistor in position. NO Check No. 01 Check the discharge pipe thermistor. NG Replace the discharge pipe thermistor. OK Is the connector S40 properly connected? Check No.14 Refer to P.
Troubleshooting SiUS071735E 4.16 Compressor Lock Error Code E6 Method of Error Detection A compressor lock is detected by the current waveform generated when applying high-frequency voltage to the motor. Error Decision Conditions If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes without any other error Supposed Causes Closed stop valve Compressor locked Disconnection of compressor harness Troubleshooting Caution Check No.12 Refer to P.
SiUS071735E Troubleshooting 4.17 DC Fan Lock (Outdoor Fan Motor) Error Code E7 Method of Error Detection An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Error Decision Conditions The fan does not start in 15 ~ 30 seconds even when the fan motor is running. If the error repeats, the system is shut down.
Troubleshooting SiUS071735E 4.18 Input Overcurrent Detection Error Code E8 Method of Error Detection An input overcurrent is detected by checking the input current value with the compressor running. Error Decision Conditions The current exceeds about 12.0 ~ 18.0 A (depending on the model) for 2.5 seconds with the compressor running. (The upper limit of the current decreases when the outdoor temperature exceeds a certain level.
SiUS071735E Troubleshooting 4.19 Four Way Valve Abnormality Error Code EA Method of Error Detection The room temperature thermistor and the indoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Error Decision Conditions The following condition continues over 10 minutes after operating for 5 minutes.
Troubleshooting SiUS071735E Troubleshooting Caution Check No.01 Refer to P.99 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Four way valve coil disconnected (loose)? YES Correct the four way valve coil. NO Check No.13 Refer to P.102 Harness disconnected? YES Reconnect the harness. NO Check No.14 Refer to P.102 Check the continuity of the four way valve coil and harness. Disconnect the harness from the connector.
SiUS071735E Troubleshooting 4.20 Discharge Pipe Temperature Control Error Code F3 Method of Error Detection An error is determined with the temperature detected by the discharge pipe thermistor. Error Decision Conditions If the temperature detected by the discharge pipe thermistor rises above A, the compressor stops. The error is cleared when the discharge pipe temperature has dropped below B. A B °C °F °C °F 09/12 class 110 230 88 190.
Troubleshooting SiUS071735E 4.21 High Pressure Control in Cooling Error Code F6 Method of Error Detection High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Error Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rise above 57.5 ~ 61°C (135.5 ~ 141.8°F) (depending on the model).
SiUS071735E Troubleshooting Troubleshooting Caution Check No.01 Refer to P.99 Check No.12 Refer to P.101 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the installation space. Check No. 17 Check the installation condition. NG OK Check No.17 Refer to P.106 Check No. 19 Check the outdoor fan. NG OK Check No.18 Refer to P.106 Check No. 18 Check the discharge pressure. NG Change the installation location or direction.
Troubleshooting SiUS071735E 4.22 System Shutdown due to Compressor Internal Temperature Abnormality Error Code F8 Method of Error Detection Operation is halted when the temperature detected by the discharge pipe thermistor exceeds the determined limit. Error Decision Conditions Temperature exceeds the detection threshold of 127.5°C (261.5°F) during forced cooling operation.
SiUS071735E Troubleshooting 4.23 Compressor System Sensor Abnormality Error Code H0 Method of Error Detection The system checks the DC current before the compressor starts. Error Decision Conditions The voltage converted from the DC current before compressor start-up is out of the range 0.5 ~ 4.5 V. The DC voltage before compressor start-up is below 50 V.
Troubleshooting SiUS071735E 4.24 Position Sensor Abnormality Error Code H6 Method of Error Detection A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Error Decision Conditions If the error repeats, the system is shut down.
SiUS071735E Troubleshooting Troubleshooting Caution Check No.15 Refer to P.103 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Check the power supply voltage. Check No.18 Refer to P.106 Check No.20 Refer to P.107 Is the power supply voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check No. 18 Check the discharge pressure. OK? NO Replace the stop valve. YES Check No.
Troubleshooting SiUS071735E 4.25 Thermistor or Related Abnormality (Outdoor Unit) Error Code H9, J3, J6, P4 Method of Error Detection This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature sensed by each thermistor. Error Decision Conditions The voltage between the both ends of the thermistor is either 4.96 V or more, or 0.04 V or less with the power on.
SiUS071735E Troubleshooting Troubleshooting In case of H9, J3, J6 Caution Check No.01 Refer to P.99 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn on the power again. Error displayed again on remote controller? NO Reconnect the connectors or thermistors. YES Check No. 01 Check the thermistor resistance value. Normal? J3 error: the discharge pipe temperature is lower than the heat exchanger temperature.
Troubleshooting SiUS071735E 4.26 Electrical Box Temperature Rise Error Code L3 Method of Error Detection An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Error Decision Conditions With the compressor off, the radiation fin temperature is above A. The error is cleared when the radiation fin temperature drops below B.
SiUS071735E Troubleshooting 4.27 Radiation Fin Temperature Rise L4 Error Code Method of Error Detection A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Error Decision Conditions If the radiation fin temperature with the compressor on is above A. The error is cleared when the radiation fin temperature drops below B. If the error repeats, the system is shut down.
Troubleshooting SiUS071735E 4.28 Output Overcurrent Detection Error Code L5 Method of Error Detection An output overcurrent is detected by checking the current that flows in the inverter DC section. Error Decision Conditions A position signal error occurs while the compressor is running. A rotation speed error occurs while the compressor is running. An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer.
SiUS071735E Troubleshooting Troubleshooting Caution Check No.15 Refer to P.103 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again. Check No. 17 Check the installation condition. Check No.17 Refer to P.
Check SiUS071735E 5. Check 5.1 Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using a multimeter. The data is for reference purpose only. Thermistor temperature Resistance (kΩ) °C °F –20 –4 197.8 –15 5 148.2 –10 14 112.1 –5 23 85.60 0 32 65.93 5 41 51.14 10 50 39.99 15 59 31.52 20 68 25.02 25 77 20.00 30 86 16.10 35 95 13.04 40 104 10.62 45 113 8.707 50 122 7.
SiUS071735E 5.2 Check Indoor Fan Motor Connector Check Check No.02 1. Turn the power supply OFF. 2. With the fan motor connector disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table. Measuring points White - Blue Orange - Blue Brown - Blue Red - Blue Judgement 1 MΩ or more 100 kΩ or more 100 Ω or more 100 kΩ or more X8A White FG Orange Vsp Brown Vcc Blue GND — — — — Red Vdc/Vm (R25080) 5.
Check 5.4 SiUS071735E Electronic Expansion Valve Check Check No.12 Conduct the following to check the electronic expansion valve (EV). 1. Check if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check if the EV generates a latching sound. 3. If the EV does not generate a latching sound in step 2, disconnect the connector and check the continuity using a multimeter. 4.
SiUS071735E 5.5 Check Four Way Valve Performance Check Check No.13 Turn the power off and then on again. Start heating operation. S80 voltage at 208 - 230 VAC with compressor on? (Fig. 1) ∗ Four way valve coil Cooling / Dry / Defrost: Not energized Heating: energized NO Replace the outdoor unit PCB (main PCB). YES Disconnect the four way valve coil from the connector and check the continuity. Four way valve coil resistance at 1000 ~ 2000 Ω? NO Replace the four way valve coil.
Check 5.7 SiUS071735E Inverter Analyzer Check Check No.15 Characteristics Inverter analyzer: RSUK0917C If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (main PCB, power module, etc.). The inverter analyzer makes it possible to judge the cause of trouble easily and securely.
SiUS071735E Check Step 3 Activate power transistor test operation from the outdoor unit. Start method of power transistor test operation Note: Power transistor test operation can be activated only once after turning on the power supply. If reactivation of the power supply transistor operation is needed, turn the power supply off and then on again. With Wired Remote Controller (BRC1E73) 1. Turn the power on. 2. Set FAN operation using the remote controller. 3.
Check SiUS071735E Caution 1. When the output frequency is low, the LEDs blink slowly. As the output frequency increases, the LEDs blink quicker. (The LEDs look like they are lit.) 2. On completion of the inverter analyzer diagnosis, be sure to re-crimp the FASTON terminals. Otherwise, the terminals may be burned due to loosening. Direction of crimp This size is shortened by the crimp. FASTON terminal (R15292) 5.8 Rotation Pulse Check on the Outdoor Unit PCB Check No.
SiUS071735E 5.9 Check Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air suction and discharge area. NG Change the installation location or direction. OK Is the discharged air short-circuited? YES Change the installation location or direction. NO Is the outdoor heat exchanger very dirty? YES Clean the outdoor heat exchanger.
Check SiUS071735E 5.11 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Is the outdoor fan running? NO YES Fan motor lead wire connector disconnected? NO Go to Check No. 16. YES Reconnect the connector. Outdoor fan system is functioning. (R21195) 5.12 Main Circuit Short Check Check No.20 Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approximately 0 V before checking.
SiUS071735E Check – + Multimeter – ~ ~ + 15/18/24 class 4 3 2 1 (R25105) Service Diagnosis 108
Check SiUS071735E 5.13 Power Module Check Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is approximately 0 V before checking. Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector. Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multimeter.
SiUS071735E Check 15/18/24 class W V U DC_P1: + DC_N1: – Service Diagnosis (R20704) 110
SiUS071735E Part 7 Trial Operation and Field Settings 1. 2. 3. 4. Pump Down Operation............................................................................112 Forced Cooling Operation .......................................................................113 Trial Operation ........................................................................................ 114 Field Settings ..........................................................................................117 4.1 4.2 4.3 4.
SiUS071735E Pump Down Operation 1. Pump Down Operation Outline In order to protect the environment, be sure to pump down when relocating or disposing of the unit. Details 1. 2. 3. 4. 5. Remove the valve cap from the liquid stop valve and the gas stop valve. Carry out forced cooling operation. After 5 to 10 minutes, close the liquid stop valve with a hexagonal wrench. After 2 to 3 minutes, close the gas stop valve and stop forced cooling operation. Attach the valve cap once procedures are complete.
Forced Cooling Operation SiUS071735E 2. Forced Cooling Operation Outline The forced cooling operation is allowed when both the following conditions are met. 1. The outdoor unit is not abnormal and not in the 3-minute standby mode. 2. The outdoor unit is not operating. Protection functions have priority over all other functions during forced cooling operation. Details With Wired Remote Controller (BRC1E73) 1. Set to COOL operation using the remote controller. 1. 2.
SiUS071735E Trial Operation 3. Trial Operation Make sure to install the decoration panel before carrying out trial operation if the wireless remote controller is used. Trial operation should be carried out in either COOL or HEAT operation. Outline 1. Measure the supply voltage and make sure that it is within the specified range. 2. In COOL operation, select the lowest programmable temperature; in HEAT operation, select the highest programmable temperature. 3.
Trial Operation SiUS071735E With Wired Remote Controller (BRC1E73) 1. Set to COOL or HEAT operation using the remote controller. Basic screen 1. 2. 2. Press and hold Cancel button for 4 seconds or longer. Service settings menu is displayed. 3. Select Test Operation in the service settings menu, and press Menu/OK button. 3. Basic screen returns and “Test Operation” is displayed at the bottom. Cool Set to 68 F Press and hold Cancel button for 4 seconds or longer during backlight lit.
SiUS071735E Trial Operation With Wireless Remote Controller (BRC082A43) 1. Press button and select the COOL or HEAT operation. 2. Press button twice. “TEST” is displayed. 3. Press button within 10 seconds, and the test operation starts. Monitor the operation of the indoor unit for a minimum of 10 minutes. During test operation, the indoor unit will continue to cool/heat regardless of the temperature setpoint and room temperature.
Field Settings SiUS071735E 4. Field Settings 4.1 How to Change the Field Settings Outline If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual for each optional accessory. Note: When using 2 remote controllers for 1 indoor unit, change the field settings from MAIN remote controller. Note that the field settings can not be set from SUB remote controller.
SiUS071735E Field Settings 3. Highlight the mode, and select desired “Mode No.” by using (Up/Down) button. 4. In the case of setting per indoor unit during group control (When Mode No. such as 20 , 22 , 23 , 25 are selected), highlight the unit No.and select “Indoor unit No.” to be set by using (Up/Down) button. (In the case of group setting, this operation is not needed.) In the case of individual setting per indoor unit, current settings are displayed. And, SECOND CODE NO. “ - ” means no function. 5.
Field Settings SiUS071735E Wireless Remote Controller (BRC082A43) UP button Mode No. Field setting mode First code No. DOWN button RESERVE button MODE button Second code No. INSPECTION/TEST button (R25096) To set the field settings, you have to change: Mode No. First code No. Second code No. 1. When in normal mode, hold down /TEST button for at least 4 seconds to enter the Field Set mode. 2. Select the desired Mode No. with MODE button. 3. Press button and select the First code No. 4.
SiUS071735E 4.2 Field Settings Overview of the Field Settings : Factory setting 3 Filter cleaning Longlife sign interval (used to change filter filter cleaning display interval Standard according to filter filter contamination) Filter cleaning sign (used to set filter cleaning display ON/ OFF) 11 (21) 7 Air volume adjustment 13 (23) 6 External static pressure Note: 01 02 03 04 05 06 Approx. 1,250 hrs. — — — — Approx. 100 hrs.
Field Settings 4.3 SiUS071735E MAIN/SUB and Address Setting for Wireless Remote Controller Outline If setting multiple wireless remote controllers to operate in one room, perform address setting for the receiver and the wireless remote controller. If using both a wired remote controller and a wireless remote controller with 1 indoor unit, change the MAIN/SUB switch of the signal receiver PCB.
SiUS071735E Wireless Remote Controller Address Field Settings Factory set is 1. Change the wireless remote controller address setting by the following steps, if necessary. 1. Hold down button and /TEST button at the same time for at least 4 seconds to enter the field setting mode. (SETTING is indicated on the display). 2. Press FAN button and select display setting ( or ). Each time the button is pressed, the display switches between and . 3. Press button and button to set the address.
Field Settings SiUS071735E After Setting Stick the Unit No. label on the receiver and the back of the wireless remote controller. Wireless remote controller (2) Unit No. label (5) 1 (R25081) Note: 4.4 Set the Unit No. of the receiver and the wireless remote controller to be the equal. If the settings differ, the signal from the remote controller cannot be transmitted.
SiUS071735E Silicone Grease on Power Transistor/Diode Bridge 5. Silicone Grease on Power Transistor/Diode Bridge Outline Apply the specified silicone grease to the heat radiation part of a power transistor/diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power transistor/diode bridge. Details 1. 2. 3. 4. Wipe off the old silicone grease completely. Apply the silicone grease evenly. See the illustrations below for examples of application.
SiUS071735E Part 8 Appendix 1. Piping Diagrams......................................................................................126 1.1 Indoor Unit................................................................................................ 126 1.2 Outdoor Unit ............................................................................................. 127 2. Wiring Diagrams......................................................................................129 2.1 Indoor Unit....................
SiUS071735E Piping Diagrams 1. Piping Diagrams 1.
Piping Diagrams 1.
SiUS071735E Piping Diagrams RX24RMVJU 3D092249A Appendix 128
Wiring Diagrams SiUS071735E 2. Wiring Diagrams 2.1 Indoor Unit FDMQ09/12/15/18/24RVJU 3D112629A Note: 129 A1P: Control PCB A2P: Indoor fan PCB Refer to Part 3 for Printed Circuit Board Connector Wiring Diagram.
SiUS071735E 2.2 Wiring Diagrams Outdoor Unit RX09/12RMVJU 3D112531 Note: Appendix PCB1: Main PCB Refer to Part 3 for Printed Circuit Board Connector Wiring Diagram.
Wiring Diagrams SiUS071735E RX15/18/24RMVJU WIRING DIAGRAM FIELD WIRING INDOOR 2 L2 2 WHT 3 3 RED HN1 S V2 ZF GRN/YLW L2 MRM10 ~ V3 L1 + + C7 - PAM - - FU1 V1 3.15A FU2 3.
SiUS071735E Operation Limit 3. Operation Limit RX09/12/15/18/24RMVJU Heating 70 Cooling 122 64.4 114.8 60 50 *NOTE 2 Continuous operation 68 50 Outdoor temp. (˚FWB) Outdoor temp. (˚FDB) 86 Pull-down period Continuous operation 104 41 32 23 32 14 14 5 50 57.2 68 73.4 Indoor temp. (˚FWB) 82.4 86 50 68 86 Indoor temp. (˚FDB) Notes: 1. The graphs are based on the following conditions. • Equivalent piping length 25ft • Level difference 0ft 2.
Revision History Month / Year Version 01 / 2018 SiUS071735E Revised contents First edition
Warning z Daikin products are manufactured for export to numerous countries throughout the world. Prior to purchase, please confirm with your local authorized importer, distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for use, in the region where the product will be used. This statement does not purport to exclude, restrict or modify the application of any local legislation. z Ask a qualified installer or contractor to install this product.
