SiBE04-624_B Inverter Pair Wall Mounted Type E-Series [Applied Models] z Inverter Pair : Heat Pump
SiBE04-624_B Inverter Pair Wall Mounted Type E-Series zHeat Pump Indoor Unit FTXR28EV1B9 FTXR42EV1B9 FTXR50EV1B9 Outdoor Unit RXR28EV1B9 RXR42EV1B9 RXR50EV1B9 RXR28EV1B8 RXR42EV1B8 RXR50EV1B8 The removal procedure for each model is separately bound. Refer to page 155 for the booklet number of applicable model.
SiBE04-624_B 1. Introduction .............................................................................................v 1.1 Safety Cautions ........................................................................................v 1.2 Used Icons .............................................................................................. ix Part 1 List of Functions ................................................................ 1 1. Functions...........................................................
SiBE04-624_B 2.7 2.8 2.9 2.10 2.11 2.12 Draft Prevention Control (Hot-Start Function) ........................................61 Dew Prevention Control .........................................................................61 Outdoor Fan Control...............................................................................62 Liquid Compression Protection Function................................................62 Defrost Control ............................................................................
SiBE04-624_B 2.36 2.37 2.38 2.39 2.40 Radiation Fin Temperature Rise ..........................................................126 Output Overcurrent Detection ..............................................................128 Fan Motor System Abnormality / Fan Lock ..........................................130 Heater Wire Abnormality ......................................................................131 Humidifying Thermistor Abnormality / Humidifying Heater Temperature Abnormality ....................
Introduction SiBE04-624_B 1. Introduction 1.1 Safety Cautions Cautions and Warnings Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely. The “ Caution” items can also lead to serious accidents under some conditions if they are not followed.
SiBE04-624_B Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident. In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-410A refrigerant. The use of materials for R-22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle as well as an equipment failure.
Introduction SiBE04-624_B 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire. If the power cable and lead wires have scratches or deteriorated, be sure to replace them.
SiBE04-624_B Introduction Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame. only Incorrect use of the installation frame and improper installation may cause the equipment to fall, resulting in injury.
Introduction SiBE04-624_B Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause the water to enter the room and wet the furniture and floor. Do not tilt the unit when removing it. The water inside the unit may spill and wet the furniture and floor.
SiBE04-624_B Part 1 List of Functions 1. Functions.................................................................................................
Functions SiBE04-624_B Basic Function Functions Inverter (with inverter power control) Operation limit for cooling (°CDB) Operation limit for heating (°CWB) PAM control Oval scroll compressor Swing compressor Rotary compressor Reluctance DC motor Comfortable Power-airflow flap Airflow Power-airflow dual flaps Power-airflow diffuser Wide-angle louvers Vertical auto-swing (up and down) Horizontal auto-swing (right and left) 3-D airflow COMFORT AIRFLOW operation COOLING BREEZE operation Comfort Auto fan s
Basic Function Functions Inverter (with inverter power control) Operation limit for cooling (°CDB) Operation limit for heating (°CWB) PAM control Oval scroll compressor Swing compressor Rotary compressor Reluctance DC motor Comfortable Power-airflow flap Airflow Power-airflow dual flaps Power-airflow diffuser Wide-angle louvers Vertical auto-swing (up and down) Horizontal auto-swing (right and left) 3-D airflow COMFORT AIRFLOW operation COOLING BREEZE operation Comfort Auto fan speed Control Indoor unit
SiBE04-624_B Part 2 Specifications 1. Specifications ..........................................................................................
SiBE04-624_B Specifications 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit Model FTXR28EV1B9 RXR28EV1B9 Outdoor Unit Capacity Rated (Min. ~ Max.) Moisture Removal Running Current (Rated) Power Consumption Rated (Min. ~ Max.) Power Factor COP Rated (Min. ~ Max.) Liquid Piping Connections Gas Drain Heat Insulation Max. Interunit Piping Length Max.
Specifications SiBE04-624_B 50 Hz, 220 - 230 - 240 V Indoor Unit Model FTXR50EV1B9 RXR50EV1B9 Outdoor Unit Capacity Rated (Min. ~ Max.) Moisture Removal Running Current (Rated) Power Consumption Rated (Min. ~ Max.) Power Factor COP Rated (Min. ~ Max.) Liquid Piping Connections Gas Drain Heat Insulation Max. Interunit Piping Length Max.
SiBE04-624_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit Model FTXR28EV1B9 RXR28EV1B8 Outdoor Unit Capacity Rated (Min. ~ Max.) Moisture Removal Running Current (Rated) Power Consumption Rated (Min. ~ Max.) Power Factor COP Rated (Min. ~ Max.) Liquid Piping Connections Gas Drain Heat Insulation Max. Interunit Piping Length Max.
Specifications SiBE04-624_B 50 Hz, 220 - 230 - 240 V Indoor Unit Model FTXR50EV1B9 RXR50EV1B8 Outdoor Unit Capacity Rated (Min. ~ Max.) Moisture Removal Running Current (Rated) Power Consumption Rated (Min. ~ Max.) Power Factor COP Rated (Min. ~ Max.) Liquid Piping Connections Gas Drain Heat Insulation Max. Interunit Piping Length Max.
SiBE04-624_B Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.............................................................................................10 2. Outdoor Unit..........................................................................................
Indoor Unit SiBE04-624_B 1.
SiBE04-624_B Indoor Unit A2P: Display PCB 1) 2) 3) 4) S56 S57 S63 (H1P) JA 5) SW1 (S1W) 6) LED2 (H2P) 7) LED3 (H3P) Connector for control PCB Connector for signal receiver / transmitter PCB Connector for LED PCB (multi monitor) Address setting jumper *Refer to page 150 for detail. Forced cooling operation [ON/OFF] button *Refer to page 147 for detail.
Indoor Unit A4P: Humidity Sensor PCB SiBE04-624_B 1) CN1 2) R2T Connector for control PCB Room temperature thermistor R2T Humidity sensor CN1 3P163282-1 A5P: Streamer Unit PCB 1) S401 2) S402 3) S403 Connector for control PCB Connector for limit switch for streamer Connector for streamer S402 S401 S403 12 3P163349-1 Printed Circuit Board Connector Wiring Diagram
SiBE04-624_B Outdoor Unit 2.
SiBE04-624_B Part 4 Function and Control 1. Main Functions......................................................................................15 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 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 Temperature Control ..............................................................................15 Frequency Principle................................................................................15 Airflow Direction Control..............
SiBE04-624_B Main Functions 1. Main Functions 1.1 Temperature Control Definitions of Temperatures The definitions of temperatures are classified as following.
Main Functions Drawing of Inverter SiBE04-624_B The following drawing shows a schematic view of the inverter principle: Refrigerant circulation rate (high) AC power Amount of heat exchanged air (small) DC power high speed 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) Inverter Features (R2812) The inverter provid
SiBE04-624_B 1.3 Main Functions Airflow Direction Control 1.3.1 Power-Airflow Dual Flaps The large flaps send a large volume of air downward to the floor and provide an optimum control in cooling, dry, and heating operation. During cooling or dry operation, the flap retracts into the indoor unit. Then, cool air can be blown far and pervaded all over the room. During heating operation, the large flap directs airflow downward to spread the warm air to the entire room. 1.3.
Main Functions SiBE04-624_B 1.3.5 COMFORT AIRFLOW Operation The indication changes every time “ Displays COMFORT AIRFLOW operation Displays COOLING BREEZE operation ” is pressed. Indication disappears COMFORT AIRFLOW Operation (R13852) Effective mode for COMFORT AIRFLOW operation AUTO HEATING HUMID HEATING COOLING “SARARA” DRYING DRY COOLING MOISTURIZING Flap motion Left and right flaps move according to the settings of the remote controller.
SiBE04-624_B Main Functions 1.3.6 COOLING BREEZE Operation Operation The indication changes every time “ Displays COMFORT AIRFLOW operation Displays COOLING BREEZE operation ” is pressed. Indication disappears COOLING BREEZE Operation (R13855) Effective mode for COOLING BREEZE operation • • • • Note COOLING “SARARA” DRYING DRY COOLING FLASH STREAMER AIR PURIFYING On AUTO operation, when the actual operation mode is HEATING, COOLING BREEZE operation does not work.
Main Functions 1.4 SiBE04-624_B Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature. This is done through phase control and Hall IC control. For more information about Hall IC, refer to the troubleshooting for fan motor on page 89.
SiBE04-624_B 1.5 Main Functions Thermostat Control Outline Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Detail Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference returns to the zone C after being in the zone A. The system resumes from defrost control in any zones except A. The operation turns on in any zones except A.
Main Functions 1.6 SiBE04-624_B “URURU” HUMIDIFYING / HUMID HEATING Operation Operation "URURU" HUMIDIFYING operation HUMID HEATING operation (R13858) Features Humidifying method This method intakes moisture from the outdoor air using the hygroscopic element mounted in the outdoor unit, and sends it indoor. This enables powerful and speedy humidification. taking in outdoor moisture fully humidifying the room (R18141) The room is uniformly humidified.
SiBE04-624_B Main Functions Powerful humidifying ability The humidifying capacity is 450 ml/h (50 class) and equivalent to that of a normal humidifier. Model Humidifying Capacity 28 class 400 ml/h 42 class 425 ml/h 50 class 450 ml/h The values above are measured at 7°CDB / 6°CWB of outdoor air temperature and 7.5 m humidifying hose length. No need for water supply or cleaning Water supply and cleaning are unnecessary as there is no water tank, and there is no proliferation of bacteria.
Main Functions SiBE04-624_B Humidity Fluctuation by Temperature Settings During HUMID HEATING operation, as room temperature rises, relative humidity is temporarily lowered. This is because as room temperature rises, relative humidity is lowered even if the moisture content is the same. EX: The rise in the room temperature from 15°C to 25°C results in the fall in humidity from 40%RH to about 22%RH.
SiBE04-624_B Main Functions Time chart for humidifying operation control Approximately 1 minute after heating operation starts, humidifying operation and drying operation repeats alternately to prevent condensation inside the hose. ON Heating operation OFF Approx. 1 min. + Approx. 3 min. Humidifying fan damper ON OFF ON Hygroscopic OFF fan Heater (b') (a) 15 sec. (b) (a) (b) (a) (b') 15 sec. ON Drying OFF ON Humidifying rotor OFF (R18142) (a): Humidifying time Approx. 70 min.
Main Functions Humidification performance by outdoor temperature SiBE04-624_B The humidifying of this system is different from that of a normal humidifier. The humidifying performance varies depending on the outdoor temperature or installation condition. Sufficient humidifying capacity may not be attained depending on the weather condition. When the outdoor temperature drops by 5°C, the humidifying capacity decreases by about 15%.
SiBE04-624_B Reachable humidity by outdoor condition Main Functions Humidifying capacity drops when the outdoor temperature and the outdoor humidity are low. 28 class 100 Condition; Set temperature: 20°C Airflow rate: H tap Room volume: 70 m3 Ventilation rate: 0.5 times/hour Humidifying hose length: 7.
Main Functions SiBE04-624_B Performance correction by hose length The maximum piping length is set to 10 m, but the humidifying capacity varies depending on the length of the humidifying hose. When the hose length increases by 2 m, the humidifying capacity decreases by about 10%. Outdoor temp. 7˚CDB, 6˚CWB Humidifying capacity ratio (7.
SiBE04-624_B Main Functions Room humidity (humidity of the discharged air) by outdoor temperature (16 m2, hose length: 4 m, ventilation rate: 0.75 times/hour, 28 class) 1. Room temp. 17°CDB 100% Room humidity (%RH) 90% Outdoor relative humidity 80% 80%RH 70% 60% 60%RH 50% 40%RH 40% 30% 20% 10% 0% –10 –5 0 5 10 15 20 Outdoor temperature (˚C) (R13872) 2. Room temp.
Main Functions 1.7 SiBE04-624_B “SARARA” DRYING / DRY COOLING Operation Operation DRY COOLING operation "SARARA" DRYING operation (R13875) Features of “SARARA” DRYING Reheating dehumidifying method A powerful evaporator eliminates the humidity in the room exclusively. Dry, cool air is mixed with warm air from the reheater, thereby blowing in optimal and comfortable dry air.
SiBE04-624_B Main Functions Differences between “SARARA” DRYING and DRY COOLING operation Method “SARARA” DRYING DRY COOLING Pressure reducing devices (solenoid valves) are Like COOLING operation, DRY COOLING located at the center of the indoor heat exchanger. operation raises latent heat capacity with The upper side acts as a condenser to heat the air. controlling sensible heat capacity by adjusting the compressor frequency and indoor airflow rate.
Main Functions 1.8 SiBE04-624_B AUTO Operation Operation AUTO operation (R5985) Outline Detail Automatic Cooling / Heating Function When the AUTO operation is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.
SiBE04-624_B 1.9 Main Functions MOISTURIZING Operation Operation MOISTURIZING operation (R13878) Effective mode for MOISTURE COOLING operation • COOLING • DRY COOLING Effective mode for MOISTURE HEATING operation • HEATING • HUMID HEATING Features MOISTURIZING operation has following 3 features.
Main Functions SiBE04-624_B 1.10 FLASH STREAMER AIR PURIFYING Operation Operation The indication changes every time “ FLASH STREAMER AIR PURIFYING + FRESH AIR SUPPLY VENTILATION FLASH STREAMER AIR PURIFYING + Strong FRESH AIR SUPPLY VENTILATION OFF ” is pressed. FLASH STREAMER AIR PURIFYING FLASH STREAMER AIR PURIFYING operation (R18353) Temperature, humidity and airflow rate cannot be changed. Features The same technology as for real air purifiers is adopted.
SiBE04-624_B Main Functions Removing Formaldehyde Indoor formaldehyde concentration (ppm) 0.35 0.3 Decomposing speed is 3.5 times faster than that of the natural ventilation. 0.25 0.2 Guideline released by the Ministry of Health, Labor and Welfare in Japan (0.08 ppm) 0.15 0.5-time natural ventilation With streamer 0.1 0.08 0.05 0 0 100 200 300 400 Operation time (min.) The formaldehyde concentration in the laboratory (10 m2) at 0.
Main Functions SiBE04-624_B 1.11 FRESH AIR SUPPLY VENTILATION Operation Operation The indication changes every time “ FLASH STREAMER AIR PURIFYING + FRESH AIR SUPPLY VENTILATION FLASH STREAMER AIR PURIFYING + Strong FRESH AIR SUPPLY VENTILATION OFF ” is pressed. FLASH STREAMER AIR PURIFYING FRESH AIR SUPPLY VENTILATION operation (R5977) Temperature, humidity and airflow rate cannot be changed. Features The air supply ventilation system uses only fresh air.
SiBE04-624_B Main Functions Ventilation System Ventilation is mainly divided into two types. The convenient system is supply ventilation. Supply Ventilation Exhaust Ventilation Fresh Air Air Supply Draft (R5979) - Quiet because the ventilation fan is located in the outdoor unit - Operation noise is heard because the ventilation fan is located in the room. - Energy saving system due to low heat loss - Electricity charges are high because heat loss is high.
Main Functions SiBE04-624_B 1.13 TIMER Operation 1.13.1 24-hour ON/OFF TIMER Operation Set the time ON/OFF TIMER Cancel (R13885) Features Time can be set in the unit of 10 minutes. When the 24-hour ON/OFF TIMER is set, the indication of present time disappears. Time is kept in memory in the next operation unless it is canceled. The clock error is ± 30 seconds per month.
SiBE04-624_B Main Functions 1.14 NIGHT SET Mode Outline When the OFF timer is set, the NIGHT SET Mode is automatically activated. The NIGHT SET Mode keeps the airflow rate setting. Detail The NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers it slightly in the case of heating.
Main Functions SiBE04-624_B 1.15 COMFORT SLEEP Operation Operation Set the time to wake up. COMFORT SLEEP operation (R13887) Effective mode for COMFORT SLEEP operation • • • • • • Features COOLING DRY COOLING MOISTURE COOLING HEATING HUMID HEATING MOISTURE HEATING Outline of function The temperature is controlled in unique V-shape pattern within the range of about 2°C upper and lower.
SiBE04-624_B Main Functions Human sleep Body Temperature Sleep cycle and change in body temperature (˚C) 38 9 18 24 2 3 4 → Time 6 7 5 37 36 Sharp lowering of body temperature after falling asleep Stage of sleep 1 Awakening REM sleep 1 9 Sleep cycle 18 24 1 2 3 Maximum difference of change in body temperature 4 5 6 7 Rising of body temperature before wake-up 2 3 Smooth shift to awakening 4 Deep sleep Regular rhythm Falling asleep Rising (R13889) Time chart of V-shape comf
Main Functions SiBE04-624_B 1.16 POWERFUL Operation Operation POWERFUL operation (Cannot be used while the unit is not running.) (R5971) Effective mode for POWERFUL COOLING operation • COOLING • DRY COOLING • MOISTURE COOLING Effective mode for POWERFUL HEATING operation • HEATING • HUMID HEATING • MOISTURE HEATING Features Operating sound becomes slightly loud. It is impossible to change the airflow rate, temperature, and humidity.
SiBE04-624_B Main Functions 1.17 MOLD PROOF Operation This is an integrated naming of functions of inside drying and moisture exhaustion. Drying inside the air conditioner prevents mold and odors from growing. Operation Operation can be selected from automatic and manual. Automatic operation If MOLD PROOF operation is set ON, the MOLD PROOF operation starts automatically after “SARARA” DRYING or COOLING operation. Operation starts depending on the amount of time the unit has been run.
Main Functions SiBE04-624_B 1. Drained water discharge 2. Inside drying operation Drained water in the drain pan is discharged. After the drained water discharged, the moisture which are left on the drain pan or the indoor heat exchanger are dried by evaporation. 3. Moisture exhaustion Moisture is exhausted to outdoors through the humidification hose.
SiBE04-624_B Main Functions 1.18 MOLD SHOCK OUT Operation The room is kept clean by removing excessive moisture by rapidly lowering the humidity in the room for 1 hour, and keeping operation for 2 hours (total 3 hours). Operation It is not self-starting operation. MOLD SHOCK OUT Operation (Hold down for 2 seconds.) (R13895) Features Dry shock method Generation of mold is prevented by sudden drying of humid environment.
Main Functions SiBE04-624_B Comparison of COOLING operation and MOLD SHOCK OUT operation Normal COOLING operation The humidity in the room returns to original level when COOLING operation stops. Humidity COOLING start COOLING stop Time Growth of mold Mold grows according to the humidity. Time (R18355) MOLD SHOCK OUT operation after COOLING The humidity in the room is lowered suddenly.
SiBE04-624_B Reference Main Functions Effect Humidity % 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 9:00 9:20 MOLD SHOCK OUT operation. <27˚C, 75 - 85 %, reheating dehumidifying (–3˚C)> Without MOLD SHOCK OUT operation Before MOLD SHOCK OUT operation Humidity (indoor) Humidity without MOLD SHOCK OUT operation With MOLD SHOCK OUT operation Outdoor temperature Room temperature Growth of mold can be prevented by lowering the humidity to half and continuing the operation for 3 hours.
Main Functions SiBE04-624_B 1.19 INFORMATION DISPLAY Operation INFORMATION Return to normal display Set temperature Room temperature Indoor humidity Outdoor temperature (R13901) After pressing the [INFO] button, point the remote controller at the indoor unit for 2 seconds. Every time you press the [INFO] button, room temperature, indoor humidity, and outdoor Features temperature are displayed.
SiBE04-624_B Main Functions 1.20 Multi-colored Indicator Lamp Features The current operation mode is displayed in color of the lamp of the indoor unit which changes in 8 colors. Operating status can be monitored even in AUTO operation in accordance with the actual operation. Multi-colored indicator lamp (R5990) The lamp color changes according to the operation. • HEATING ............................................................ red • “URURU” HUMIDIFYING / HUMID HEATING .... orange • COOLING .....
Main Functions SiBE04-624_B 1.23 Clock Setting ARC447 Series The clock can be set by taking the following steps: 1. Press the [CLOCK] button. → is displayed and blinks. 2. Press the [SELECT] or button to set the clock to the present time. Holding down the [SELECT] or button increases or decreases the time display rapidly. 3. Press the [CLOCK] button again. → and blink and clock setting is completed. SELECT button CLOCK button (R18147) 1.
SiBE04-624_B Main Functions 1.25 Other Functions 1.25.1 Hot-Start Function In order to prevent the cold air blast that normally comes when heating operation is started, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or made very weak thereby carrying out comfortable heating of the room. *The cold air blast is also prevented using similar control when the defrost operation is started or when the thermostat is turned ON. 1.25.
Main Functions SiBE04-624_B 1.26 Table for Special Modes Indoor [ON/OFF] 5~9 sec. [CANCEL] 5 sec. A Forced cooling operation mode B Diagnosis mode • Operation OFF • Left for 15 min. • [CANCEL] 5 sec. • Left for 60 sec. Mode selection view: Select with [SELECT] or button. Left for 60 sec. [CLOCK] Trial operation Normal mode Trial operation mode Hose length setting mode • Operation OFF • Left for 30 min. [CLOCK] Hose length setting • [CLOCK] 5 sec. • Left for 60 sec.
SiBE04-624_B Main Functions 1. Trial operation mode: You can select a mode for trial operation with the remote controller. The operation continues for approx. 30 minutes. Refer to the installation manual. 2. Hose length setting mode: You can set the humidifying hose length or check the preset value. Refer to the installation manual. 3. Drying mode: Hose Dry operation is a forced drying operation for humidifying hose. The operation continues for approx. 30 minutes.
Control Specification SiBE04-624_B 2. Control Specification 2.1 Outline Frequency Control Frequency is determined according to the difference between the room thermistor temperature and the target temperature. The function is explained as follows. 1. How to determine frequency 2. Frequency command from the indoor unit (Difference between the room thermistor temperature and the target temperature) 3. Frequency initial setting 4.
SiBE04-624_B Control Specification Indoor Frequency Command (∆D signal) The difference between the room thermistor temperature and the target temperature is taken as the “∆D signal” and is used for frequency command. Temperature difference ∆D signal Temperature difference ∆D signal Temperature difference ∆D signal Temperature difference ∆D signal –2.0 0 4 2.0 8 4.0 C –1.5 ∗Th OFF 1 0.5 5 2.5 9 4.5 D –1.0 –0.5 2 3 1.0 1.5 6 7 3.0 3.5 A B 5.0 5.
Control Specification 2.2 SiBE04-624_B Controls at Mode Changing / Start-up 2.2.1 Preheating Operation Outline The inverter operation in open phase starts with the conditions of the preheating command from the indoor unit, the outdoor temperature, and the discharge pipe temperature. Detail Outdoor temperature ≥ 7°C Preheating OFF 12˚C Discharge pipe temperature 10˚C Preheating ON (R5922) Outdoor temperature < 7°C Preheating OFF 22˚C Discharge pipe temperature 20˚C Preheating ON (R5923) 2.2.
SiBE04-624_B Control Specification 2.2.4 3-minute Standby Turning on the compressor is prohibited for 3 minutes after turning it off. (Except when defrosting.) 2.2.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not activated when defrosting.) (Hz) Frequency D C B A E F G H (sec.
Control Specification 2.3 Outline SiBE04-624_B 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.
SiBE04-624_B 2.4 Control Specification Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit from the input current. In case of heat pump model, this control which is the upper limit control of the frequency takes priority to the lower limit of control of four way valve operation compensation.
Control Specification 2.5 SiBE04-624_B Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit controls the operating frequency limitation and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) Detail The operating frequency limitation is judged with the indoor heat exchanger temperature.
SiBE04-624_B 2.7 Control Specification Draft Prevention Control (Hot-Start Function) Outline Draft prevention control prevents cold draft when the unit is started up in heating operation. This function is activated when the indoor heat exchanger temperature drops. Detail Draft prevention control is conducted by monitoring indoor heat exchanger temperature. When the indoor heat exchanger temperature drops below 33°C, the minimum frequency of the compressor increases.
Control Specification 2.9 SiBE04-624_B 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 while defrosting The outdoor fan is turned OFF while defrosting. 3. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. 4. Fan ON/OFF control when operation starts / stops The outdoor fan is turned ON when the operation starts.
SiBE04-624_B Control Specification 2.11 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. Detail Conditions for Starting Defrost The starting conditions is 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 SiBE04-624_B 2.12 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Open Control 1. Electronic expansion valve control when starting operation 2. Electronic expansion valve control when the frequency changes 3. Electronic expansion valve control for defrosting 4.
SiBE04-624_B Control Specification 2.12.1 Fully Closing with Power ON The electronic expansion valve is initialized when turning on the power. The opening position is set and the pressure equalization is developed. 2.12.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens, and develops the pressure equalization. 2.12.
Control Specification SiBE04-624_B 2.12.7 Control for Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensation temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, and operates for a specified time, and then stops.
SiBE04-624_B Part 5 Remote Controller 1. FTXR28/42/50EV1B9............................................................................
FTXR28/42/50EV1B9 SiBE04-624_B 1. FTXR28/42/50EV1B9 Signal transmitter / receiver Display • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) Receiver • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. • The maximum distance for communication is approx. 7m.
SiBE04-624_B FTXR28/42/50EV1B9 Open the lid SWING16 button • Adjusts the airflow direction. • When you press the SWING button, the flap moves up and down, or (and) the louver moves right and left. The flap (louver) stops when you press the SWING button again. MOISTURIZING17 button • Keeps humidity high to moisturize your skin. FAN setting10 button HOME LEAVE VENTILATION18 button • Selects the airflow rate setting every time you press this button. • Ventilates the room during home leaving.
FTXR28/42/50EV1B9 Temperature and Humidity Settings SiBE04-624_B Heating “URURU” HUMIDIFYING Operation HEATING HUMID HEATING “URURU” HUMIDIFYING 10˚C – 30˚C OFF LOW STD –––––– HIGH CONT LOW STD HIGH CONT Cooling “SARARA” DRYING Operation COOLING DRY COOLING “SARARA” DRYING 18˚C – 32˚C OFF HIGH STD –3˚C – STD LOW CONT HIGH STD LOW CONT AUTO Operation 18˚C – 30˚C Airflow Rate To change the airflow rate, press the “ ” button during operation.
SiBE04-624_B Part 6 Service Diagnosis 1. Convenient Service Check Function .....................................................73 1.1 Indoor Unit..............................................................................................73 1.2 Outdoor Unit ...........................................................................................73 2. Troubleshooting ....................................................................................74 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.
SiBE04-624_B 2.40 Humidifying Thermistor Abnormality / Humidifying Heater Temperature Abnormality .....................................132 3. Check ..................................................................................................134 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 72 Thermistor Resistance Check ..............................................................134 Fan Motor Connector Output Check ....................................................
SiBE04-624_B Convenient Service Check Function 1. Convenient Service Check Function 1.1 Indoor Unit Multi-colored Indicator Lamp The multi-colored indicator 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.
Troubleshooting SiBE04-624_B 2. Troubleshooting 2.1 Error Codes and Description Code Unit Basic Failure Diagnosis No display A1 A5 A6 AH C4 C7 C9 CC E1 E5 E6 E7 E8 EA F3 F6 H0 H1 H6 H8 H9 J3 J6 L3 L4 L5 P4 P9 PA Indoor Outdoor Air conditioner runs but does not cool (heat) the room. 78 When operation starts, safety breaker works. 80 Air conditioner makes big noise and vibration. 82 Air is not humidified enough.
SiBE04-624_B 2.2 Troubleshooting Air conditioner does not run. Error Code Error Decision Conditions Supposed Causes Service Diagnosis 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, refrigerant shortage, overfilling, mixed air, etc.
Troubleshooting SiBE04-624_B Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. 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 until the power is restored.
SiBE04-624_B Troubleshooting Continued from the previous page (1) Is there a sound indicating that a signal from the remote controller is received? NO Are the batteries in the remote controller flat? YES Replace the batteries. NO YES Does the address of the remote controller match with that of the indoor unit? NO Match the address. YES YES Operation lamp blinks? NO Is an error code displayed on the remote controller? YES Diagnose by the error code. Go to troubleshooting.
Troubleshooting 2.3 SiBE04-624_B Air conditioner runs but does not cool (heat) the room. Error Code Error Decision Conditions Supposed Causes 78 Improper setting for temperature Incorrect combination of indoor unit and outdoor unit Clogged air filter Insufficient power Refrigerant piping is too long Defective field piping (squeezed, etc.
SiBE04-624_B Troubleshooting Troubleshooting Caution Check No.01 Refer to P.134 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Is the set temperature appropriate? NO Thermostat off is activated. Set the appropriate temperature. YES Is there required installation space? NO Provide required space. YES Is the indoor unit compatible with the outdoor unit? NO Match the compatible models.
Troubleshooting 2.4 SiBE04-624_B When operation starts, safety breaker works. Error Code Error Decision Conditions Supposed Causes 80 Insufficient capacity of safety breaker Earth leakage breaker is too sensitive. Not exclusive circuit The supply voltage is not within rated voltage ±10%. The size of connecting wire is thin. Air is mixed.
SiBE04-624_B Troubleshooting Troubleshooting Check No.20 Refer to P.142 Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. [Power supply] Is the capacity of safety breaker as specified? NO Replace the safety breaker to a specified one. YES Does the earth leakage breaker work? YES Increase the set value of the earth leakage current on the breaker (or replace the breaker).
Troubleshooting 2.5 SiBE04-624_B Air conditioner makes big noise and vibration. Error Code Error Decision Conditions Supposed Causes Refrigerant piping 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 connectors, or parts may be damaged.
SiBE04-624_B 2.6 Troubleshooting Air is not humidified enough. Error Code Error Decision Conditions Supposed Causes Service Diagnosis Hose length is not set. Improper setting for hose length Air is short-circuited at outdoor unit. Clogged air supply filter Insufficient heat insulation of duct Indoor ventilation is made too often. Ceiling is very high.
Troubleshooting SiBE04-624_B Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Does the length of humidification hose exceed the specified length? YES Correct the hose length within the specified length. Explain it to the user. NO Does the set hose length match with the field hose length? NO Reset the hose length with the remote controller. YES Is the air supply filter clogged? YES Clean the air supply filter.
SiBE04-624_B 2.7 Troubleshooting Lights-out of Microcomputer Status Lamp Error Code No display Method of Error Detection When a microcomputer fault is detected, LED A or LED 5 turns off. Error Decision Conditions Supposed Causes Outdoor unit PCB is not power supplied Power supply failure due to noise Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Is correct power supplied? NO Turn on the power supply.
Troubleshooting 2.8 SiBE04-624_B Indoor Unit PCB Abnormality A1 Error Code Method of Error Detection The system checks if the circuit works properly within the microcomputer of the indoor unit. Error Decision Conditions The system cannot set the internal settings.
SiBE04-624_B 2.9 Troubleshooting Freeze-up Protection Control or Heating Peak-cut Control Error Code A5 Method of Error Detection Freeze-up protection control Error Decision Conditions Freeze-up protection control Supposed Causes Service Diagnosis During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor.
Troubleshooting SiBE04-624_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check No.01 Refer to P.134 Check the air passage. Is there any short circuit? YES Provide sufficient air passage. NO Check the air filter. Dirty? YES Clean the air filter. NO Check the dust accumulation on the indoor heat exchanger. Dirty? YES Clean the indoor heat exchanger. NO Check No.
SiBE04-624_B Troubleshooting 2.10 Fan Motor (DC Motor) or Related Abnormality Error Code A6 Method of Error Detection The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
Troubleshooting SiBE04-624_B Troubleshooting Caution Check No.02 Refer to P.135 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power supply and rotate the fan by hand. Does the fan rotate smoothly? NO Replace the indoor fan motor. YES Turn the power on and start operation. Does the fan rotate? Turn off the power supply NO and disconnect the fan motor connector, then turn the power on.
SiBE04-624_B Troubleshooting 2.11 Streamer Unit Abnormality Error Code AH Method of Error Detection Error Decision Conditions If the error repeats in air purifying operation, the system is shut down.
Troubleshooting SiBE04-624_B Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Dust or drip of water is on the streamer unit. YES Clean the streamer unit. NO Does the multi-colored indicator lamp 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 surely. NO Install the streamer unit surely.
SiBE04-624_B Troubleshooting 2.12 Thermistor or Related Abnormality (Indoor Unit) Error Code C4, C9 Method of Error Detection The temperatures detected by the thermistors determine thermistor errors. Error Decision Conditions The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB (humidity sensor PCB, control PCB) Troubleshooting Caution Check No.01 Refer to P.
Troubleshooting SiBE04-624_B 2.13 Front Panel Open / Close Abnormality C7 Error Code Method of Error Detection Error Decision Conditions If the error repeats, the system is shut down. Supposed Causes Defective reduction motor Malfunction or deterioration of the front panel mechanism Defective limit switch Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Restart and check the movement.
SiBE04-624_B Troubleshooting 2.14 Humidity Sensor Abnormality Error Code CC Method of Error Detection Sensor abnormality is detected by input value. Error Decision Conditions The input from the humidity sensor is 4.96 V or more or 0.04 V or less. Supposed Causes Disconnection of connector Defective indoor unit PCB (humidity sensor PCB, control PCB) Defective humidity sensor Troubleshooting Caution Check No.07 Refer to P.
Troubleshooting SiBE04-624_B 2.15 Refrigerant Shortage Error Code Method of Error Detection U0 Refrigerant shortage detection I: Refrigerant shortage is detected by checking the input current value and the compressor running frequency. If the refrigerant is short, the input current is lower than the normal value. Refrigerant shortage detection III: Refrigerant shortage is detected by checking the difference between suction and discharge temperature.
SiBE04-624_B Troubleshooting Troubleshooting Caution Check No.01 Refer to P.134 Check No.12 Refer to P.136 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Any thermistor disconnected? NO Stop valve closed? YES Replace the thermistor(s) in position. ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗ Room temperature thermistor ∗ Outdoor temperature thermistor YES Open the stop valve.
Troubleshooting SiBE04-624_B 2.16 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 150 V. If the error repeats, the system is shut down.
SiBE04-624_B Troubleshooting Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the supply voltage. Voltage as specified? NO Correct the power supply. YES Check the connection of the compressor harness. Loose or disconnected? YES Reconnect the harness. NO Rotate the fan by hand. Does the fan rotate smoothly? NO Replace both the fan motor and the outdoor unit PCB.
Troubleshooting SiBE04-624_B 2.17 Signal Transmission Error (between Indoor Unit and Outdoor Unit) Error Code U4 Method of Error Detection The data sent from the outdoor unit is checked for problem. Error Decision Conditions The data sent from the outdoor unit cannot be received without error, or the disable status of signal transmission continues for 15 seconds.
SiBE04-624_B Troubleshooting 2.18 Outdoor Unit PCB Abnormality or Communication Circuit Abnormality Error Code U4 Method of Error Detection Detection within the program of the microcomputer that the program is in good running order. Error Decision Conditions The program of the microcomputer does not work in order. Signal transmission between the units cannot be performed for more than 15 seconds. Zero-cross signal cannot be detected for more than 10 seconds.
Troubleshooting SiBE04-624_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check indoor unit also, because a communication circuit fault may be caused by the problem related to the indoor unit. Check the power supply voltage. Rated voltage? NO Rectify the power supply. YES Check the varistor on the outdoor unit PCB. YES Replace the varistor. Damaged? NO Check the fuse on the outdoor unit PCB.
SiBE04-624_B Troubleshooting Continued from the previous page (1) Check No.11 Refer to P.135 Does the LED A turn off? NO Check grounding. YES Grounded? YES Rotate the outdoor fan by hand. Does the outdoor fan rotate smoothly? NO NO Carry out grounding work. The cause seems to be an external factor other than the outdoor unit PCB. Investigate source of noise and take measures. Replace both the fan motor and the outdoor unit PCB. YES Check No.
Troubleshooting SiBE04-624_B 2.19 Signal Transmission Error on Outdoor Unit PCB Error Code U7 Method of Error Detection Communication error between microcomputers mounted on the outdoor unit PCB. Error Decision Conditions When the data sent from the microcomputer of the inverter can not be received successively for 15 seconds, the unit shuts down. Error counter is reset when the data from the microcomputer of the inverter can be successfully received.
SiBE04-624_B Troubleshooting 2.20 Unspecified Voltage (between Indoor Unit and Outdoor Unit) Error Code UA Method of Error Detection The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal. Method of Error Detection The pair type and multi type are interconnected.
Troubleshooting SiBE04-624_B 2.21 Incomplete Setting for Hose Length Error Code UA Method of Error Detection This fault occurs when the humidification hose length is not stored in the EEPROMs of the indoor unit and the outdoor unit. (Hose length is not stored at initial power on.) Error Decision Conditions When the humidification hose length is not stored in EEPROMs of the indoor unit and the Supposed Causes Hose length is not set.
SiBE04-624_B Troubleshooting 2.22 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 SiBE04-624_B 2.23 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.
SiBE04-624_B Troubleshooting Troubleshooting Caution Check No.01 Refer to P.134 Check No.12 Refer to P.136 Check No.13 Refer to P.137 Check No.14 Refer to P.138 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Discharge pipe thermistor disconnected? YES Insert the thermistor in position. NO Check No. 01 Check the thermistors. NG ∗ Discharge pipe thermistor Replace the discharge pipe thermistor.
Troubleshooting SiBE04-624_B 2.24 Compressor Lock Error Code E6 Method of Error Detection A compressor lock is detected by checking the compressor running condition through the position detection circuit. Error Decision Conditions Operation stops due to overcurrent. If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes without any other error Supposed Causes Compressor locked Compressor harness disconnected Troubleshooting Caution Check No.
SiBE04-624_B Troubleshooting 2.25 DC Fan Lock 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 60 seconds even when the fan motor is running. If the error repeats, the system is shut down.
Troubleshooting SiBE04-624_B 2.26 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 14 A for 5 seconds with the compressor running. (The upper limit of the current decreases when the outdoor temperature exceeds a certain level.
SiBE04-624_B Troubleshooting 2.27 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 Cooling / Dry A following condition continues over 10 minutes after operating for 5 minutes. (room thermistor temp. – indoor heat exchanger temp.) < –5°C Heating (indoor heat exchanger temp. – room thermistor temp.
Troubleshooting SiBE04-624_B Troubleshooting Caution Check No.01 Refer to P.134 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.137 Harness out of connector? YES Reconnect the harness. NO Check No.14 Refer to P.138 Check the continuity of the four way valve coil and harness. Disconnect the harness from the connector.
SiBE04-624_B Troubleshooting 2.28 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 118°C, the compressor stops. The error is cleared when the discharge pipe temperature has dropped below 85°C. If the error repeats, the system is shut down.
Troubleshooting SiBE04-624_B 2.29 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 rises above about 65°C. The error is cleared when the temperature drops below about 50°C.
SiBE04-624_B Troubleshooting 2.30 Compressor System Sensor Abnormality Error Code H0 Method of Error Detection Fault condition is identified by DC current which is detected before compressor startup. Error Decision Conditions When the DC voltage is 50 V or less. Supposed Causes Defective outdoor unit PCB Harness disconnection / improper connection Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Troubleshooting SiBE04-624_B 2.31 Damper Abnormality Error Code H1 Method of Error Detection Detected by the limit switch (LS) in the humidifier unit. Error Decision Conditions Limit switch does not turn on or off at the following timing Supposed Causes * The humidifier unit starts. (When the power supply turns on, humidifying operation starts) * The humidifier unit stops.
SiBE04-624_B Troubleshooting 2.32 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 When the compressor does not run for 15 seconds after receiving operation start command. If the error repeats, the system is shut down.
Troubleshooting SiBE04-624_B Troubleshooting Caution Check No.15 Refer to P.138 Check No.18 Refer to P.141 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. Voltage as rated? Check No.20 Refer to P.142 NO Correct the power supply. YES Check No. 18 Check the discharge pressure. OK? NO Replace the stop valve. YES Check No. 20 Check the short circuit of the diode bridge.
SiBE04-624_B Troubleshooting 2.33 DC Voltage / Current Sensor Abnormality Error Code H8 Method of Error Detection DC voltage or DC current sensor abnormality is identified based on the compressor running frequency and the input current. Error Decision Conditions The compressor operation frequency is more than 62 Hz and the input current is less than 0.75 A. If the error repeats, the system is shut down.
Troubleshooting SiBE04-624_B 2.34 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 thermistor input is above 4.98 V or below 0.02 V with the power on.
SiBE04-624_B Troubleshooting Troubleshooting Caution Check No.01 Refer to P.134 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 SiBE04-624_B 2.35 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°C. The error is cleared when the radiation fin temperature drops below B°C.
SiBE04-624_B Troubleshooting Troubleshooting Caution Check No.01 Refer to P.134 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. WARNING Turn off the power and turn it on again. To cool the electrical components, the outdoor fan starts when the radiation fin temperature rises above C˚C and stops when it drops below B˚C. Check No.17 Refer to P.141 YES Error again or outdoor fan activated? Check No.19 Refer to P.
Troubleshooting SiBE04-624_B 2.36 Radiation Fin Temperature Rise Error Code L4 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°C. The error is cleared when the radiation fin temperature drops below B°C. If the error repeats, the system is shut down.
SiBE04-624_B Troubleshooting Troubleshooting Caution Check No.01 Refer to P.134 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power and turn it on again to start the system. Check No.17 Refer to P.141 Error displayed again? Check No.19 Refer to P.142 YES Has the PCB been replaced? NO YES NO Check if the silicon grease is applied properly on the radiation fin. If not, apply the silicon grease.
Troubleshooting SiBE04-624_B 2.37 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 speed error occurs while the compressor is running. An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer. If the error repeats, the system is shut down.
SiBE04-624_B Troubleshooting Troubleshooting Caution Check No.15 Refer to P.138 Check No.17 Refer to P.141 Check No.18 Refer to P.141 Check No.22 Refer to P.143 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.
Troubleshooting SiBE04-624_B 2.38 Fan Motor System Abnormality / Fan Lock Error Code P9 Method of Error Detection During humidifying fan motor running, fan motor system abnormality is identified based on the fan rotation speed (rpm) detected by Hall IC. Error Decision Conditions When the fan rotation speed does not reach 100 rpm within 7 seconds after the fan motor starts.
SiBE04-624_B Troubleshooting 2.39 Heater Wire Abnormality Error Code PA Method of Error Detection An error is identified when the outlet temperature of humidifying fan does not reach a certain temperature within a given time after the heater is turned on. Error Decision Conditions When the temperature detected by the humidifying thermistor is lower than the outdoor temperature (with the heater turned off) + 6°C, and this condition continues for 30 minutes.
Troubleshooting SiBE04-624_B 2.40 Humidifying Thermistor Abnormality / Humidifying Heater Temperature Abnormality Error Code PH Method of Error Detection An error is identified when the temperature detected by the humidification thermistor is abnormal. Error Decision Conditions When the power is supplied and the thermistor input is 4.92 V or more, or 0.06 V or less. The humidifying fan outlet temperature is more than 90°C.
SiBE04-624_B Troubleshooting Troubleshooting Caution Check No.01 Refer to P.134 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the connector for proper connection. NO Reconnect the connector properly. OK? Check No.19 Refer to P.142 YES Check No.01 Thermistor resistance check *The humidifying thermistor is exclusive for fan outlet temperature. NO OK? Replace the thermistor.
Check SiBE04-624_B 3. Check 3.1 Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the table and the graph below. The data is for reference purpose only. Thermistor temperature (°C) –20 Resistance (kΩ) 197.8 –15 –10 148.2 112.1 –5 0 85.60 65.93 5 10 51.14 39.99 15 20 31.52 25.02 25 20.00 30 35 16.10 13.
SiBE04-624_B 3.2 Check Fan Motor Connector Output Check Check No.02 1. 2. 3. 4. 5. Check the connection of connector. Check the motor power supply voltage output (pins 4 - 7). Check the motor control voltage (pins 4 - 3). Check the rotation command voltage (pins 4 - 2). Check the rotation pulse (pins 4 - 1). S1 7 6 5 4 3 2 1 Motor power supply voltage (310 ~ 340 VDC) Unused Unused GND Motor control voltage (15 VDC) Rotation command voltage (1~ 5 VDC) Rotation pulse input (R12404) 3.
Check 3.5 SiBE04-624_B Electronic Expansion Valve Check Check No.12 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check to see if the EV generates a latching sound. 3. If the EV does not generate a latching sound in the above step 2, disconnect the connector and check the continuity using a tester. 4.
SiBE04-624_B 3.6 Check Four Way Valve Performance Check Check No.13 < 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 0 VDC with compressor on? NO Replace the outdoor unit PCB. YES ∗ Four way valve coil Cooling / Dry : No continuity Heating : Continuity Start heating operation. S80 voltage at 120 ~ 220 VDC for 3 sec. after compressor starts, and then at about 12 ~15 VDC? (Fig.
Check 3.7 SiBE04-624_B Inverter Units Refrigerant System Check Check No.14 Refrigerant system check Is the discharge pipe thermistor disconnected from the holder? YES Reconnect the thermistor. NO Check for refrigerant leakage. See the service diagnosis on refrigerant shortage (U0). Replace the refrigerant. (R18138) 3.8 Inverter Analyzer Check Check No.
SiBE04-624_B Check Reference: If the terminals of the compressor are not FASTON terminals (difficult to remove the wires on the terminals), it is possible to connect wires available on site to the outdoor unit from output side of PCB. (Do not connect them to the compressor at the same time, otherwise it may result in incorrect detection.) Step 3 Activate the power transistor test operation with the remote controller. (1) Turn the power on.
Check 3.9 SiBE04-624_B Rotating Pulse Check on Outdoor Unit PCB Check No.16 For outdoor fan motor or humidifier fan motor Outdoor fan motor: S70 Humidifier fan motor: S72 Make sure that the voltage of 320 ± 30 V is applied. 1. Set operation OFF and power OFF. Remove the connector [S70] or [S72]. 2. Check that the voltage between the pins 4 - 7 is 320 VDC. 3. Check that the control voltage between the pins 3 - 4 is 15 VDC. 4. Check that the rotation command voltage between the pins 2 - 4 is 5 VDC. 5.
SiBE04-624_B Check 3.10 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 SiBE04-624_B 3.12 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Fan motor lead wire connector disconnected? NO Outdoor fan running? YES YES Reconnect the connector. NO Go to Check No. 16. Outdoor fan system is functioning. (R15001) 3.13 Main Circuit Short Check Check No.20 Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V before checking.
SiBE04-624_B Check 3.14 Power Module Check Check No.22 Note: Check to make sure that the voltage between (+) and (–) of the power module (IPM1) is approx. 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 multi-tester.
Check SiBE04-624_B 3.15 Dehumidifying Solenoid Valve Check Check No.23 Faulty criterion: In dehumidification test operation mode, PCB is identified defective when the dehumidifying solenoid valves do not turn on within 2 seconds after compressor start-up. (When dehumidifying solenoid valves are not used, the operation mode is similar to cooling operation.) Stop operation. Check the voltage of [S43]. ∗ pins 1 - 2 ∗ pins 3 - 4 The voltage is 0 V? A voltage is applied.
SiBE04-624_B Part 7 Trial Operation and Field Settings 1. 2. 3. 4. Pump Down Operation........................................................................146 Forced Cooling Operation ...................................................................147 Trial Operation ....................................................................................148 Field Settings ......................................................................................149 4.1 Humidifying Hose Length Setting .......
Pump Down Operation SiBE04-624_B 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Detail 1) Remove the valve caps from the liquid stop valve and the gas stop valve. 2) Carry out forced cooling operation. 3) After 5 to 10 minutes, close the liquid stop valve with a hexagonal wrench. 4) After 2 to 3 minutes, close the gas stop valve and stop the forced cooling operation.
SiBE04-624_B Forced Cooling Operation 2. Forced Cooling Operation Item Conditions Forced Cooling 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. Start Command frequency End Others Press the forced cooling operation [ON/OFF] button (SW1) on the indoor unit for 5 seconds.
Trial Operation SiBE04-624_B 3. Trial Operation Outline 1. Measure the supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating operation. 3. Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly. The air conditioner requires a small amount of power in standby mode.
SiBE04-624_B Field Settings 4. Field Settings 4.1 Humidifying Hose Length Setting Outline Set the humidifying hose length to ensure humidifying capacity. Use the remote controller to set the humidifying hose length. Power on the unit to establish the communication between the unit and the remote controller. (The humidifying hose length includes the rear part of the indoor unit.) Display [SELECT] button [CLOCK] button (R14036) Detail 1) Press the [CLOCK] button for 5 seconds. → is displayed.
Field Settings 4.2 SiBE04-624_B When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor unit and the corresponding wireless remote controller can be set for different addresses. Both the indoor unit PCB and the wireless remote controller need alteration. Indoor Unit PCB Cut the address setting jumper JA on the control PCB. Electrical box Cut JA. (R14037) Wireless Remote Controller Cut the address setting jumper J4. Jumper J4 (R18328) 4.
SiBE04-624_B Silicon Grease on Power Transistor / Diode Bridge 5. Silicon Grease on Power Transistor / Diode Bridge Outline Apply the specified silicon grease to the heat radiation part of a power transistor / diode bridge when you replace an outdoor unit PCB. The silicon grease encourages the heat radiation of a power transistor / diode bridge. Detail 1. 2. 3. 4. Wipe off the old silicon grease completely. Apply the silicon grease evenly. See the illustrations below for examples of application.
SiBE04-624_B Part 8 Appendix 1. Piping Diagrams..................................................................................153 1.1 Indoor Unit............................................................................................153 1.2 Outdoor Unit .........................................................................................153 2. Wiring Diagrams..................................................................................154 2.1 Indoor Unit.....................................
SiBE04-624_B Piping Diagrams 1. Piping Diagrams 1.1 Indoor Unit FTXR28/42/50EV1B9 INDOOR UNIT 6.4CuT THERMISTOR ON HEAT EXCH. SV SV HEAT EXCHANGER SOLENOID VALVE AT RATED VOLTAGE: CLOSED (UNDER DEHUMIDIFICATION OPERATION) CROSS FLOW FAN HEAT EXCHANGER M FAN MOTOR FIELD PIPING (6.4CuT) SINGLE UNION JOINT 9.5CuT FIELD PIPING (9.5CuT) SINGLE UNION JOINT REFRIGERANT FLOW COOLING HEATING 4D054058C 1.2 Outdoor Unit RXR28/42/50EV1B9, RXR28/42/50EV1B8 OUTDOOR UNIT 12.7CuT 7.
Wiring Diagrams SiBE04-624_B 2. Wiring Diagrams 2.
SiBE04-624_B Removal Procedure (Booklet No.) 3. Removal Procedure (Booklet No.) Refer to the following booklets for removal procedure. Appendix ∗FTXR28/42/50EV1B9 Refer to Si041260. ∗RXR28/42/50EV1B9 Refer to SiBE04-624_A. ∗RXR28/42/50EV1B8 Refer to Si001275.
Revision History Month / Year Version Revised contents 08 / 2006 SiBE04-624 01 / 2007 SiBE04-624_A Model change: FTXR28/42/50EV1B9, RXR28/42/50EV1B9 12 / 2012 SiBE04-624_B Model addition: RXR28/42/50EV1B8 First edition
Warning z Daikin products are manufactured for export to numerous countries throughout the world. Prior to purchase, please confirm with your local authorised 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.
