SiBE041029_A Service Manual Inverter Pair Wall Mounted Type G-Series [Applied Models] z Inverter Pair : Heat Pump
SiBE041029_A Inverter Pair Wall Mounted Type G-Series zHeat Pump Indoor Unit FTX50GV1B FTX60GV1B FTX71GV1B Outdoor Unit RX50G2V1B RX60G2V1B RX71GV1B RX50G3V1B RX60G3V1B RX71GV1B9 The removal procedure for each model is separately bound. Refer to page 119 for the booklet number of applicable model.
SiBE041029_A 1. Introduction .............................................................................................v 1.1 Safety Cautions ........................................................................................v 1.2 Used Icons .............................................................................................. ix Part 1 List of Functions ................................................................ 1 1. Functions...........................................................
SiBE041029_A Part 6 Service Diagnosis............................................................. 49 1. Troubleshooting with LED .....................................................................51 1.1 Indoor Unit..............................................................................................51 1.2 Outdoor Unit ...........................................................................................51 2. Problem Symptoms and Measures ....................................................
SiBE041029_A Part 7 Trial Operation and Field Settings................................. 105 1. 2. 3. 4. Pump Down Operation........................................................................106 Forced Cooling Operation ...................................................................107 Trial Operation ....................................................................................108 Field Settings ......................................................................................109 4.
Introduction SiBE041029_A 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.
SiBE041029_A 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 SiBE041029_A 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.
SiBE041029_A 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 SiBE041029_A 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.
SiBE041029_A Part 1 List of Functions 1. Functions.................................................................................................
Functions SiBE041029_A Functions Basic Function Inverter (with inverter power control) Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Functions Health & Clean Air-purifying filter — Operation limit for cooling (°CDB) –10 ~46 Photocatalytic deodorizing filter — Operation limit for heating (°CWB) –15 ~18 Air-purifying filter with photocatalytic deodorizing function — Titanium apatite photocatalytic air-purifying filter z PAM control z Oval scroll compres
Functions Basic Function Inverter (with inverter power control) Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience z Category Functions Health & Clean Air-purifying filter FTX50/60/71GV1B RX50/60G3V1B RX71GV1B9 Category Functions FTX50/60/71GV1B RX50/60G3V1B RX71GV1B9 SiBE041029_A — Operation limit for cooling (°CDB) –10 ~46 Photocatalytic deodorizing filter — Operation limit for heating (°CWB) –15 ~18 Air-purifying filter with photocatalytic deodorizing fu
SiBE041029_A Part 2 Specifications 1. Specifications ..........................................................................................
SiBE041029_A Specifications 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit Model FTX50GV1B RX50G2V1B Outdoor Unit Capacity Rated (Min. ~ Max.) 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 SiBE041029_A 50 Hz, 220 - 230 - 240V Indoor Unit Model FTX71GV1B RX71GV1B Outdoor Unit Capacity Rated (Min. ~ Max.) 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.
SiBE041029_A Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit Model FTX50GV1B RX50G3V1B Outdoor Unit Capacity Rated (Min. ~ Max.) 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 SiBE041029_A 50 Hz, 220 - 230 - 240V Indoor Unit Model FTX71GV1B RX71GV1B9 Outdoor Unit Capacity Rated (Min. ~ Max.) 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.
SiBE041029_A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.............................................................................................10 2. Outdoor Unit..........................................................................................12 2.1 RX50/60G2V1B, 71 Class......................................................................12 2.2 RX50/60G3V1B......................................................................................
Indoor Unit SiBE041029_A 1.
SiBE041029_A PCB (2): Signal Receiver PCB Indoor Unit 1) S29 2) SW1 (S1W) Connector for control PCB Forced cooling operation [ON/OFF] button ∗ Refer to page 107 for detail.
Outdoor Unit SiBE041029_A 2. Outdoor Unit 2.
SiBE041029_A Outdoor Unit 71 class AC1 FU2 E1 E2 (3.15A) V3 FU1 (30A) V2 V9 V100 HR1 (white) HR2 (blue) AC2 S10 S101 V5 S80 S90 PCB (2): Service Monitor PCB 1) S52, S102 2) LED A 3) SW1 4) SW4-B 5) SW4-C S20 S40 S70 S51 FU3 (3.15A) W V U 2P171491-7 Connector for main PCB LED for service monitor (green) Forced cooling operation ON/OFF button ∗ Refer to page 107 for detail. Switch for facility setting (71 class only) ∗ Refer to page 110 for detail.
Outdoor Unit 2.2 SiBE041029_A RX50/60G3V1B PCB (1): Filter PCB 1) 2) 3) 4) 5) 6) 7) 8) 9) S11 HL1, HN1, S E1, E2 HL2, HN2 HL4, HN4 FU1 FU3 V2, V3 SW1 Connector for [S10] on main PCB Connector for terminal board Terminal for earth wire Connector for [HL3] [HN3] on main PCB Connector for [S12] on main PCB Fuse (3.15 A, 250 V) Fuse (30 A, 250 V) Varistor Forced cooling operation ON/OFF button ∗ Refer to page 107 for detail.
SiBE041029_A PCB (2): Main PCB Outdoor Unit 1) 2) 3) 4) 5) 6) 7) 8) S10 S12 S20 S40 S50 S70 S80 S90 Connector for [S11] on filter PCB Connector for [HL4] [HN4] on filter PCB Connector for electronic expansion valve coil Connector for overload protector Connector for magnetic relay Connector for fan motor Connector for four way valve coil Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) Connector for [HL2] [HN2] on filter PCB Terminal for compressor Fuse (3.
SiBE041029_A Part 4 Function and Control 1. Main Functions......................................................................................17 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 Temperature Control ..............................................................................17 Frequency Principle................................................................................17 Airflow Direction Control.........................................................................
SiBE041029_A 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 SiBE041029_A 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
SiBE041029_A 1.3 Main Functions Airflow Direction Control Power-Airflow Dual Flaps The large flap sends a large volume of air downward to the floor and provides 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 distributed all over the room. During heating operation, the large flap directs airflow downward to spread the warm air to the entire room.
Main Functions 1.4 SiBE041029_A 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 59.
SiBE041029_A 1.5 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. Detail 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 1.6 Outline Detail SiBE041029_A Automatic Operation Automatic Cooling / Heating Function When the automatic 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.
SiBE041029_A 1.7 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 1.8 SiBE041029_A 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.
SiBE041029_A 1.9 Main Functions HOME LEAVE Operation Outline HOME LEAVE operation is a function that allows you to record your favorite set temperature and airflow rate. You can start your favorite operation mode simply by pressing the [HOME LEAVE] button on the remote controller. Detail Start of Function The function starts when the [HOME LEAVE] button is pressed in cooling operation, heating operation (including POWERFUL operation), or while the operation is stopped.
Main Functions SiBE041029_A How to Set the Temperature and Airflow Rate When using HOME LEAVE operation for the first time, set the temperature and airflow rate for HOME LEAVE operation. Record your preferred temperature and airflow rate. Initial setting Cooling temperature 25°C Heating 25°C Airflow rate Selectable range temperature 18 - 32°C 10 - 30°C Airflow rate 5 step, , 5 step, , 1. Press [HOME LEAVE] button. Make sure [ ] is displayed in the remote controller display. 2.
SiBE041029_A Main Functions 1.10 INTELLIGENT EYE Operation Outline This function detects the existence of humans in the room with a motion sensor (INTELLIGENT EYE) and reduces the capacity when there is nobody in the room in order to save electricity. Detail 1. Detection method by INTELLIGENT EYE sampling (20 msec.) Sensor output If the sensor detects the outputs 10 times/sec. or more, it judges humans exist. 1 sec.
Main Functions SiBE041029_A 1.11 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Detail When the [POWERFUL] button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes. Operation mode Fan speed Target temperature COOL DRY H tap + A rpm Dry rotating speed + A rpm 18°C Lowered by 2.
SiBE041029_A Main Functions 1.12 Clock Setting ARC433 Series The clock can be set by taking the following steps: 1. Press the [CLOCK] button. → is displayed and blinks. 2. Press the [TIMER] or button to set the clock to the present time. Holding down the [TIMER] or button increases or decreases the time display rapidly. 3. Press the [CLOCK] button again. → blinks and clock setting is completed.
Main Functions SiBE041029_A 1.13 Other Functions 1.13.1 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 control starts or when the thermostat is turned ON. 1.13.
SiBE041029_A Function of Thermistor 2. Function of Thermistor Electronic expansion valve (1) (3) Four way valve (2) Compressor (R14247) (1) Outdoor Heat Exchanger Thermistor 1. The outdoor heat exchanger thermistor is used for controlling the target discharge pipe temperature.
Control Specification SiBE041029_A 3. Control Specification 3.1 Mode Hierarchy Outline Air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing.
SiBE041029_A 3.2 Control Specification Frequency Control Outline 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.
Control Specification SiBE041029_A 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.
SiBE041029_A 3.3 Control Specification Controls at Mode Changing / Start-up 3.3.1 Preheating Control 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.
Control Specification SiBE041029_A 3.3.3 Four Way Valve Operation Compensation Outline At the beginning of the operation as the four way valve is switched, the pressure difference to activate the four way valve is acquired by having output frequency which is more than a certain fixed frequency, for a certain fixed time. Detail 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.
SiBE041029_A 3.4 Control Specification Discharge Pipe Temperature Control Outline 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.
Control Specification 3.5 Outline SiBE041029_A Input Current Control 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 models, this control which is the upper limit control of the frequency takes priority over the lower limit of control of four way valve operation compensation.
SiBE041029_A 3.6 Control Specification 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.
Control Specification 3.8 SiBE041029_A 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 seconds after the compressor stops. 4.
SiBE041029_A Control Specification 3.10 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. Detail 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 SiBE041029_A 3.11 Electronic Expansion Valve Control During target discharge pipe temperature control When the frequency changes under target discharge pipe temperature control When the disconnection of the discharge pipe thermistor is ascertained When the frequency changes under the control for disconnection of the discharge pipe thermistor Under defrost control The followings are the examples of electronic expansion valve control which function in each operation mode.
SiBE041029_A Control Specification 3.11.1 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. 3.11.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens, and develops the pressure equalization. 3.11.
Control Specification SiBE041029_A 3.11.7 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, operates for a specified time, and then stops.
SiBE041029_A Control Specification 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur in the thermistor. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Outdoor temperature thermistor 3.12.2 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed to protect the compressor.
SiBE041029_A Part 5 Remote Controller 1. FTX50/60/71GV1B................................................................................
SiBE041029_A FTX50/60/71GV1B 1. FTX50/60/71GV1B Signal transmitter Display (LCD) • 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.
FTX50/60/71GV1B SiBE041029_A Open the Front Cover MODE button • Selects the operation mode. FAN setting button QUIET button • Selects the airflow rate setting every time you press this button. • OUTDOOR UNIT QUIET operation • QUIET operation is not available in FAN and DRY operation • QUIET operation and POWERFUL operation cannot be used at the same time. Priority is given to the function you pressed last.
SiBE041029_A Part 6 Service Diagnosis 1. Troubleshooting with LED .....................................................................51 1.1 Indoor Unit..............................................................................................51 1.2 Outdoor Unit ...........................................................................................51 2. Problem Symptoms and Measures .......................................................52 3. Service Check Function ................................
SiBE041029_A 5.13 Capacitor Voltage Check......................................................................103 5.14 Power Module Check ...........................................................................
SiBE041029_A Troubleshooting with LED 1. Troubleshooting with LED 1.1 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. Operation lamp (green) (R11686) Service Monitor 1.
Problem Symptoms and Measures SiBE041029_A 2. Problem Symptoms and Measures Symptom Check Item The unit does not operate. Check the power supply. Check the type of the indoor unit. Check the outdoor temperature. Diagnose with remote controller indication. Operation sometimes stops. Details of Measure Reference Page Check if the rated voltage is supplied. Check if the indoor unit type is compatible with the outdoor unit.
SiBE041029_A Service Check Function 3. Service Check Function Check Method 1 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature display screen. Timer cancel button < ARC433 Series > (R18206) 2. Press the timer cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below. Note: Service Diagnosis No. 1 Code 00 No. 12 Code C7 No.
Service Check Function SiBE041029_A Check Method 2 1. Press the center of the [TEMP] button and the [MODE] button at the same time to enter the diagnosis mode. (R4272) The left-side number blinks. (R14967) 2. Press the [TEMP] or beeps or the long beep. button and change the number until you hear the two consecutive (R4274) 3. Diagnose by the sound. beep : The left-side number does not correspond with the error code.
SiBE041029_A Service Check Function 5. Press the [TEMP] or button and change the number until you hear the long beep. (R4277) 6. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not. long beep : Both the left-side and right-side numbers correspond with the error code. 7. Determine the error code.
Troubleshooting SiBE041029_A 4. Troubleshooting 4.
SiBE041029_A 4.2 Troubleshooting 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.
Troubleshooting 4.3 SiBE041029_A 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 During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor.
SiBE041029_A 4.4 Troubleshooting 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 SiBE041029_A Troubleshooting Caution Check No.02 Refer to P.96 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.
SiBE041029_A 4.5 Troubleshooting 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 corresponding to the error code Defective indoor unit PCB Troubleshooting Caution Check No.01 Refer to P.
Troubleshooting 4.6 SiBE041029_A 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 II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of the electronic expansion valve.
SiBE041029_A Troubleshooting Troubleshooting Caution Check No.01 Refer to P.95 Check No.12 Refer to P.97 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 4.7 SiBE041029_A 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 ~ 200 V (depending on the model).
SiBE041029_A Troubleshooting Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Is the power supply voltage as rated? NO Correct the power supply. YES Is the compressor harness loose or disconnected? YES Reconnect the compressor harness. NO Rotate the outdoor fan by hand. Does the outdoor fan rotate smoothly? NO Replace both the fan motor and the outdoor unit PCB.
Troubleshooting 4.8 SiBE041029_A Signal Transmission Error (between Indoor Unit and Outdoor Unit) Error Code U4 Method of Error Detection The data received from the outdoor unit in signal transmission 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.
SiBE041029_A Troubleshooting Troubleshooting Caution Check No.11 Refer to P.96 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Voltage as rated? NO Correct the power supply. YES Check the indoor unit - outdoor unit connection wires. Is there any wiring error? YES Correct the indoor unit outdoor unit connection wires. NO Check the voltage of the connection wires on the indoor terminal board between No.
Troubleshooting 4.9 SiBE041029_A Signal Transmission Error on Outdoor Unit PCB (RX50/60G2V1B, 71 Class Only) Error Code U7 Method of Error Detection Communication error between microcomputer mounted on the main microcomputer and PM1. Error Decision Conditions The abnormality is determined when the data sent from the PM1 can not be received for 9 seconds. The error counter is reset when the data from the PM1 can be successfully received.
SiBE041029_A Troubleshooting 4.10 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. Error Decision Conditions The pair type and multi type are interconnected.
Troubleshooting SiBE041029_A 4.11 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.
SiBE041029_A Troubleshooting Troubleshooting RX50/60G3V1B Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn on the power again. NO Is LED A blinking? Replace the outdoor unit PCB (2). YES Check to see if the outdoor unit is grounded. Grounded? NO Ground the system. YES Is the harness broken? YES Replace the harness. NO Zero-cross signal abnormality. Replace the outdoor unit PCB (1).
Troubleshooting SiBE041029_A 4.12 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.
SiBE041029_A Troubleshooting Troubleshooting Caution Check No.01 Refer to P.95 Check No.12 Refer to P.97 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Discharge pipe thermistor disconnected? NG ∗ Discharge pipe thermistor Replace the discharge pipe thermistor. OK Connectors are properly connected? Check No.14 Refer to P.98 Insert the thermistor in position. NO Check No. 01 Check the thermistors. Check No.13 Refer to P.
Troubleshooting SiBE041029_A 4.13 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 A compressor lock is detected by the current waveform generated when applying high- frequency voltage to the motor.
SiBE041029_A Troubleshooting 4.14 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 30 seconds even when the fan motor is running. If the error repeats, the system is shut down.
Troubleshooting SiBE041029_A 4.15 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 20 A for 2.5 seconds with the compressor running. (The upper limit of the current decreases when the outdoor temperature exceeds a certain level.) Supposed Causes Outdoor temperature is out of operation range.
SiBE041029_A Troubleshooting 4.16 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 1 minute after operating for 10 minutes. (room thermistor temp. – indoor heat exchanger temp.) < –5°C Heating (indoor heat exchanger temp. – room thermistor temp.
Troubleshooting SiBE041029_A Troubleshooting Caution Check No.01 Refer to P.95 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.98 Harness out of connector? YES Reconnect the harness. NO Check No.14 Refer to P.98 Check the continuity of the four way valve coil and harness. Disconnect the harness from the connector.
SiBE041029_A Troubleshooting 4.17 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°C, the compressor stops. The error is cleared when the discharge pipe temperature has dropped below B°C.
Troubleshooting SiBE041029_A 4.18 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 60 ~ 65°C (depending on the model). The error is cleared when the temperature drops below about 50°C.
SiBE041029_A Troubleshooting 4.19 Compressor System Sensor Abnormality 4.19.1 RX50/60G2V1B, 71 Class Error Code Method of Error Detection H0 The system checks the power supply voltage and the DC voltage before the compressor starts. The system checks the compressor current right after the compressor starts. Error Decision Conditions The power supply voltage and the DC voltage is obviously low or high. The compressor current does not run when the compressor starts.
Troubleshooting SiBE041029_A 4.19.2 RX50/60G3V1B Error Code H0 Method of Error Detection The system checks the DC current before the compressor starts. Error Decision Conditions The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output converted to voltage value) The DC voltage before compressor start-up is below 50 V.
SiBE041029_A Troubleshooting 4.20 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.
Troubleshooting Troubleshooting Check No.15 Refer to P.99 Check No.18 Refer to P.101 SiBE041029_A RX50/60G2V1B, 71 class Caution 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? NO Correct the power supply. YES Check No. 18 Check the discharge pressure. OK? NO Replace the stop valve. YES Check the connection.
SiBE041029_A Troubleshooting Check No.15 Refer to P.99 Check No.18 Refer to P.101 Check No.20 Refer to P.102 Troubleshooting RX50/60G3V1B Caution 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? 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.
Troubleshooting SiBE041029_A 4.21 CT or Related Abnormality (RX50/60G2V1B, 71 Class Only) Error Code H8 Method of Error Detection A CT or related error is detected by checking the compressor running frequency and CTdetected input current. Error Decision Conditions The compressor running frequency is more than A Hz, and the CT input current is less than B A. RX50/60G2V1B 71 class A (Hz) 55 B (A) 0.5 32 0.5 If the error repeats, the system is shut down.
SiBE041029_A Troubleshooting Troubleshooting Check No.15 Refer to P.99 Check No.21 Refer to P.103 Caution 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. Start operation. ∗ Running current as shown at right with relay cable 1 or 2? YES Current (guideline) Replace the outdoor unit PCB.
Troubleshooting SiBE041029_A 4.22 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 voltage is above 4.96 V or below 0.04 V with the power on.
SiBE041029_A Troubleshooting Troubleshooting In case of “H9” “J3” “J6” Caution Check No.01 Refer to P.95 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 SiBE041029_A 4.23 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.
SiBE041029_A Troubleshooting 4.24 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 Supposed Causes Service Diagnosis 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.
Troubleshooting SiBE041029_A Troubleshooting Caution Check No.17 Refer to P.101 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.19 Refer to P.102 YES Error displayed again? Has the PCB been replaced? NO YES NO Check if silicon grease is applied properly on the radiation fin. If not, apply the silicon grease. Check the radiation fin temperature.
SiBE041029_A Troubleshooting 4.25 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.
Troubleshooting SiBE041029_A Troubleshooting Caution Check No.15 Refer to P.99 Check No.17 Refer to P.101 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.
SiBE041029_A Check 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 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.
Check 5.2 SiBE041029_A 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) 5.
SiBE041029_A 5.4 Check 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.
Check 5.5 SiBE041029_A Four Way Valve Performance Check Check No.13 Turn the power off and then on again. Start heating operation. S80 voltage at 220 - 240 VAC with compressor on? (Fig. 1) ∗ Four way valve coil Cooling / Dry : No continuity Heating : Continuity NO Replace the outdoor unit 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. YES Replace the four way valve.
SiBE041029_A 5.7 Check 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.
Check SiBE041029_A Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) If all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) If the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. (3) If NG in Check No.22, replace the power module. (Replace the main PCB. The power module is united with the main PCB.) If OK in Check No.22, check if there is any solder cracking on the PCB.
SiBE041029_A 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 SiBE041029_A 5.11 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) 5.12 Main Circuit Short Check Check No.20 RX50/60G3V1B only Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V before checking.
SiBE041029_A Check 5.13 Capacitor Voltage Check Check No.21 RX50/60G2V1B, 71 class only Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question. Be careful never to touch any live parts. Multimeter (DC voltage range) (R18183) 5.14 Power Module Check Check No.22 Note: Check to make sure that the voltage between (+) and (–) of the power module is approx. 0 V before checking.
Check SiBE041029_A RX50/60G2V1B, 71 class The illustration is for 71 class as representative.
SiBE041029_A Part 7 Trial Operation and Field Settings 1. 2. 3. 4. Pump Down Operation........................................................................106 Forced Cooling Operation ...................................................................107 Trial Operation ....................................................................................108 Field Settings ......................................................................................109 4.1 When 2 Units are Installed in 1 Room...
Pump Down Operation SiBE041029_A 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.
SiBE041029_A Forced Cooling Operation 2. Forced Cooling Operation Item Conditions Forced Cooling The forced cooling operation is allowed when both of 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 The forced cooling operation starts when any of the following conditions is fulfilled. Command frequency 1) Press the forced cooling operation [ON/OFF] button (SW1) on the indoor unit for 5 seconds.
Trial Operation SiBE041029_A 3. Trial Operation Outline 1. Measure the power supply voltage and make sure that it falls within 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.
SiBE041029_A Field Settings 4. Field Settings 4.1 When 2 Units are Installed in 1 Room When 2 indoor units are installed in 1 room, 1 of the 2 indoor units 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.
Field Settings 4.2 SiBE041029_A Facility Setting Switch (cooling at low outdoor temperature) Outline This function is limited only for facilities (the target of air conditioning is equipment (such as computer)). Never use it in a residence or office (the space where there is a human). 71 Class You can expand the operation range to –15°C by turning on the switch (SW4-B) on the service monitor PCB. If the outdoor temperature falls to –20°C or lower, the operation stops.
SiBE041029_A 4.3 Field Settings Jumper and Switch Settings Indoor Unit Function Jumper Fan speed setting when compressor stops for thermostat OFF. (effective only in cooling operation) JB When connected When cut (factory setting) Fan speed setting ; Fan speed setting; “0” (The fan Remote controller stops.) setting Power failure recovery function JC Auto-restart The unit does not resume operation after recovering from a power failure. Timer settings are cleared.
Silicon Grease on Power Transistor / Diode Bridge SiBE041029_A 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.
SiBE041029_A Part 8 Appendix 1. Piping Diagrams..................................................................................114 1.1 Indoor Unit............................................................................................114 1.2 Outdoor Unit .........................................................................................114 2. Wiring Diagrams..................................................................................116 2.1 Indoor Unit.....................................
Piping Diagrams SiBE041029_A 1. Piping Diagrams 1.1 Indoor Unit FTX50/60GV1B FTX71GV1B INDOOR UNIT INDOOR UNIT (7.9CuT) (7.9CuT) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING (6.4CuT) M FIELD PIPING (6.4CuT) FAN MOTOR FIELD PIPING (12.7CuT) (12.7CuT) FIELD PIPING (15.9CuT) REFRIGERANT FLOW COOLING HEATING CROSS FLOW FAN M FAN MOTOR (12.7CuT) REFRIGERANT FLOW COOLING HEATING 4D040081Y 1.
SiBE041029_A Piping Diagrams RX50/60G3V1B OUTDOOR UNIT HEAT EXCHANGER 7.9CuT OUTDOOR TEMPERATURE THERMISTOR 7.9CuT 7.9CuT 7.9CuT 7.9CuT CAPILLARY TUBE 1 7.9CuT 4.0CuT 7.9CuT MUFFLER WITH FILTER 6.4CuT 7.9CuT 4.0CuT 7.9CuT 7.9CuT CAPILLARY TUBE 2 CAPILLARY TUBE 3 4.0CuT HEAT EXCHANGER THERMISTOR 4.0CuT CAPILLARY TUBE 4 EV M PROPELLER FAN MUFFLER ELECTRONIC EXPANSION VALVE 6.4CuT 9.5CuT 12.7CuT 12.7CuT FOUR WAY VALVE ON: HEATING HEATING FILTER 12.7CuT 7.
Wiring Diagrams SiBE041029_A 2. Wiring Diagrams 2.1 Indoor Unit FTX50/60/71GV1B FIELD WIRING. PCB3 S27 PCB1 S26 H1 ~ ~ RECTIFIER 1 Fu 3.15A H2 t° R1T S38 2 BLK 1 3 WHT 2 RED 3 GRN / YLW H3 TRANSMISSION X1M CIRCUIT CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
SiBE041029_A Wiring Diagrams RX60G2V1B L1R GRN Z1C X1M POWER SUPPLY L N Z2C N AC1 E2 BLK WHT X2M 1 2 3 BLU AC2 RED 1 8 9 V11 V6 + + + PM1 S70 1 U V W 5 4 3 FU2 3.15A S10 6(P) 7(N) 2 1 7 3.
Wiring Diagrams SiBE041029_A RX71GV1B, RX71GV1B9 L1R GRN POWER SUPPLY N AC1 HR1 MRM20 MRM10 1 BLK 9 8 1 6(P) S10 RED + + + S70 1 BLU BRN ORG WHT PM1 U V W 5 4 3 FU2 3.15A Z6C FU3 7 3.
SiBE041029_A Removal Procedure (Booklet No.) 3. Removal Procedure (Booklet No.) Refer to the following booklets for removal procedure. Appendix ∗FTX50/60/71GV1B Refer to Si041254_A. ∗RX50/60G2V1B Refer to SiBE041029. ∗RX50/60G3V1B Refer to Si001274. ∗RX71GV1B Refer to SiBE041029. ∗RX71GV1B9 Refer to Si001271_A.
Revision History Month / Year Version 03 / 2010 SiBE041029 12 / 2012 SiBE041029_A Revised contents First edition Model addition: RX50/60G3V1B, RX71GV1B9
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.
