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Daikin FTX50GV1B [72/131] Refrigerant shortage
![Daikin FTX60GV1B [72/131] Refrigerant shortage](/views2/1720409/page72/bg48.png)
Troubleshooting SiBE041029_A
62 Service Diagnosis
4.6 Refrigerant Shortage
Error Code
U0
Method of Error
Detection
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. If the refrigerant is short, the discharge pipe temperature tends
to rise.
Error Decision
Conditions
Refrigerant shortage detection I:
The following conditions continue for 7 minutes.
<RX50/60G2V1B, 71 class>
Input current
≤
A × output frequency + B
Output frequency > C
<RX50/60G3V1B>
Input current × input voltage
≤
D × output frequency + E
Output frequency > F
Refrigerant shortage detection II:
The following conditions continue for 80 seconds.
Opening of the electronic expansion valve ≥ G
Discharge pipe temperature > H × target discharge pipe temperature + J
If the error repeats, the system is shut down.
Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
Disconnection of the discharge pipe thermistor, indoor or outdoor heat exchanger thermistor,
room or outdoor temperature thermistor
Closed stop valve
Refrigerant shortage (refrigerant leakage)
Poor compression performance of compressor
Defective electronic expansion valve
A
(–)
B
(A)
C
(Hz)
RX50/60G2V1B 18/1000 0.7 55
71 class 27/1000 2.0 40
D
(–)
E (W) F (Hz)
RX50/60G3V1B 2000/256 –181 55
G (pulse) H (–) J (°C)
RX50/60G2V1B 480 255/256 cooling: 20, heating: 45
RX50/60G3V1B 480 128/128 cooling: 60, heating: 45
71 class 450 255/256 60
Содержание
- Inverter pair 1
- Manual 1
- Service 1
- Sibe041029_a 1
- Wall mounted type g series 1
- Heat pump 2
- Indoor unit 2
- Inverter pair wall mounted type g series 2
- Outdoor unit 2
- Ftx50 60 71gv1b 7 3
- Function of thermistor 1 3 control specification 2 3
- Functions 3
- Indoor unit 0 2 outdoor unit 2 3
- Introduction v 3
- Main functions 7 3
- Part 1 list of functions 3
- Part 2 specifications 3
- Part 3 printed circuit board connector wiring diagram 3
- Part 4 function and control 6 3
- Part 5 remote controller 6 3
- Specifications 3
- Table of contents 3
- Check 5 4
- Part 6 service diagnosis 9 4
- Problem symptoms and measures 2 3 service check function 3 4 troubleshooting 6 4
- Troubleshooting with led 1 4
- Part 7 trial operation and field settings 05 5
- Part 8 appendix 13 5
- Piping diagrams 14 5
- Pump down operation 06 2 forced cooling operation 07 3 trial operation 08 4 field settings 09 5
- Removal procedure booklet no 19 5
- Silicon grease on power transistor diode bridge 12 5
- Wiring diagrams 16 5
- Cautions regarding safety of workers 6
- Introduction 6
- Safety cautions 6
- Warning 6
- Caution 7
- Warning 7
- Cautions regarding safety of users 8
- Warning 8
- Caution 9
- Warning 9
- Caution 10
- Icons are used to attract the attention of the reader to specific information the meaning of each icon is described in the table below 10
- Used icons 10
- Functions 11
- Part 1 list of functions 11
- Functions 12
- Functions sibe041029_a 12
- Holding functions no functions 12
- List of functions 12
- Holding functions no functions 13
- List of functions 3 13
- Sibe041029_a functions 13
- Part 2 specifications 14
- Specifications 14
- Hz 220 230 240 v 15
- Sibe041029_a specifications 15
- Specifications 15
- Specifications 5 15
- Hz 220 230 240v 16
- Specifications 16
- Specifications sibe041029_a 16
- Hz 220 230 240 v 17
- Sibe041029_a specifications 17
- Specifications 7 17
- Hz 220 230 240v 18
- Specifications 18
- Specifications sibe041029_a 18
- Indoor unit 0 2 outdoor unit 2 19
- Part 3 printed circuit board connector wiring diagram 19
- Indoor unit 20
- Outdoor unit 22
- Rx50 60g2v1b 71 class 22
- Pcb 2 service monitor pcb 23
- Printed circuit board connector wiring diagram 13 23
- S52 s102 connector for main pcb 2 led a led for service monitor green 3 sw1 forced cooling operation on off button refer to page 107 for detail 4 sw4 b switch for facility setting 71 class only refer to page 110 for detail 5 sw4 c switch for improvement of defrost performance refer to page 111 for detail 23
- Sibe041029_a outdoor unit 23
- Sw4 a has no function keep it off 23
- Rx50 60g3v1b 24
- Function of thermistor 1 3 control specification 2 26
- Main functions 7 26
- Part 4 function and control 26
- Frequency principle 27
- Main functions 27
- Temperature control 27
- Comfortable air conditioning a fine adjustment is integrated to keep the room temperature constant 28
- Drawing of inverter the following drawing shows a schematic view of the inverter principle 28
- Energy saving heating and cooling once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power 28
- Even during extreme cold weather high capacity is achieved it is maintained even when the outdoor temperature is 2 c 28
- Forced cooling operation refer to page 107 for detail 28
- Frequency limits the following functions regulate the minimum and maximum frequency 28
- Inverter features the inverter provides the following features 28
- Quick heating and quick cooling the compressor rotational speed is increased when starting the heating or cooling this enables to reach the set temperature quickly 28
- The regulating capacity can be changed according to the changes in the outdoor temperature and cooling heating load 28
- Airflow direction control 29
- Fan speed control for indoor unit 30
- 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 then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level 31
- 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 31
- Program dry operation 31
- Y 0 ºc 31
- Zone a thermostat off 31
- Zone b zone b 31
- Zone c thermostat on 31
- Automatic operation 32
- Thermostat control 33
- 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 this prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also conserves electricity 34
- Function and control 34
- Main functions sibe041029_a 34
- Night set mode 34
- Outline when the off timer is set the night set mode is automatically activated the night set mode keeps the airflow rate setting 34
- Home leave operation 35
- 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 36
- Others 36
- Press home leave button make sure is displayed in the remote controller display 2 adjust the set temperature with or as you like 3 adjust the airflow rate with fan setting button as you like home leave operation will run with these settings the next time you use the unit to change the recorded information repeat steps 1 3 36
- The operation mode cannot be changed while home leave operation is being used 36
- The set temperature and airflow rate are memorized in the remote controller when the remote controller is reset due to replacement of battery it is necessary to set the temperature and airflow rate again for home leave operation 36
- Detail 1 detection method by intelligent eye 37
- For dry operation you cannot set the temperature with a remote controller but the target temperature is shifted internally 37
- Function and control 27 37
- In fan operation the fan speed is reduced by 60 rpm 37
- Intelligent eye operation 37
- Others 37
- 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 37
- Sibe041029_a main functions 37
- The microcomputer in the indoor unit carries out a sampling every 20 msec and if it detects 10 cycles of the wave in 1 second in total corresponding to 20 msec 10 200 msec it judges humans are in the room as the motion signal is on 37
- The motions for example in cooling 37
- The sensor detects human motion by receiving infrared rays and displays the pulse wave output 37
- When the microcomputer does not have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit at a temperature shifted from the target temperature cooling dry 1 2 c higher heating 2 c lower automatic according to the operation mode at that time 37
- 90 rpm 38
- Detail when the powerful button is pressed the fan speed and target temperature are converted to the following states for 20 minutes 38
- Ex powerful operation in cooling 38
- Inverter powerful operation 38
- 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 38
- Clock setting 39
- Auto restart function 40
- Hot start function 40
- Indoor unit on off button 40
- Other functions 40
- Signal receiving sign 40
- Titanium apatite photocatalytic air purifying filter 40
- Function of thermistor 41
- Control specification 42
- Control specification sibe041029_a 42
- Detail 42
- Function and control 42
- Mode hierarchy 42
- Note unless specified otherwise a dry operation command is regarded as cooling operation 42
- Outline air conditioner control has normal operation mode forced operation mode and power transistor test mode for installation and servicing 42
- Frequency control 43
- For limiting lower limit frequency management is carried out only when the frequency rises 44
- Frequency management when other controls are functioning 44
- I control if the operating frequency does not change for more than a certain fixed time the frequency is adjusted according to the d value when the d value is low the frequency is lowered when the d value is high the frequency is increased 44
- 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 44
- Pi control determine frequency up down by d signal 1 p control the d value is calculated in each sampling time 15 20 seconds and the frequency is adjusted according to its difference from the frequency previously calculated 44
- Th off thermostat off 44
- Upper and lower limit of frequency by pi control the frequency upper and lower limits are set according to the command of the indoor unit when the indoor or outdoor unit quiet operation command comes from the indoor unit the upper limit frequency is lower than the usual setting 44
- When frequency is dropping frequency management is carried out only when the frequency drops 44
- When starting the compressor the frequency is initialized according to the d value and the q value of the indoor unit q value indoor unit output determined from indoor unit volume airflow rate and other factors 44
- Controls at mode changing start up 45
- Four way valve switching 45
- Preheating control 45
- 3 minute standby 46
- Compressor protection function 46
- 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 when the compressor starts after resetting 4 when the compressor starts after the fault of four way valve switching the lower limit of frequency keeps a hz for b seconds with any conditions 1 through 4 above 46
- Four way valve operation compensation 46
- 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 46
- Turning on the compressor is prohibited for 3 minutes after turning it off except when defrosting 46
- When turning the compressor from off to on the upper limit of frequency is set as follows the function is not activated when defrosting 46
- Detail 47
- Discharge pipe temperature control 47
- 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 47
- After 2 seconds in this zone the compressor is stopped dropping zone 48
- After this the output frequency is lowered by 2 hz every second until it reaches the keep zone keep zone 48
- Detail 48
- Frequency control in each zone stop zone 48
- Input current control 48
- Limit of the frequency is canceled 48
- Limitation of current dropping and stop value according to the outdoor temperature 48
- 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 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 48
- The current drops when outdoor temperature becomes higher than a certain level depending on the model 48
- The present maximum frequency goes on reset zone 48
- The upper limit of the compressor frequency is defined as operation frequency 2 hz 48
- Detail 49
- Detail the operating frequency limitation is judged with the indoor heat exchanger temperature 49
- Freeze up protection control 49
- Heating peak cut control 49
- 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 49
- Outline during heating operation the indoor heat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure 49
- Liquid compression protection function 50
- Outdoor fan control 50
- Conditions for canceling defrost the judgment is made with the outdoor heat exchanger temperature b c 51
- Defrost control 51
- Detail conditions for starting defrost 51
- More than a minutes of accumulated time have passed since the start of the operation or ending the previous defrosting 51
- 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 51
- The compressor operates for 6 minutes 51
- The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature 51
- The system is in heating operation 51
- Control specification sibe041029_a 52
- Detail the followings are the examples of electronic expansion valve control which function in each operation mode 52
- Electronic expansion valve control 52
- Function and control 52
- H holding functions no functions 52
- 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 electronic expansion valve control when the discharge pipe temperature is abnormally high 5 electronic expansion valve control when the discharge pipe thermistor is disconnected feedback control target discharge pipe temperature control 52
- Control when the frequency changes 53
- Fully closing with power on 53
- High discharge pipe temperature control 53
- Opening limit control 53
- Pressure equalizing control 53
- Starting operation control 53
- Control for disconnection of the discharge pipe thermistor 54
- Target discharge pipe temperature control 54
- Detection of overcurrent and overload 55
- Malfunctions 55
- Refrigerant shortage control 55
- Sensor malfunction detection 55
- Ftx50 60 71gv1b 7 56
- Part 5 remote controller 56
- 1 home leave operation p 5 57
- 2 powerful operation p 8 57
- Button 57
- Display lcd 57
- Ftx50 60 71gv1b 57
- Heat pump model arc433b70 57
- Home leav 57
- Note refer to the operation manual of applicable model for detail you can download operation manuals from distributor s page distributor s page product information operation installation manual url http global daikin com daikin global distributors_admin user_mng login php 57
- On off button 57
- Powerfu 57
- Reference refer to the following pages for detail 57
- Remote controller 47 57
- Sibe041029_a ftx50 60 71gv1b 57
- Signal transmitter 57
- Temperature adjustment buttons 57
- Button 58
- Fan setting button 58
- Mode button 58
- Note refer to the operation manual of applicable model for detail you can download operation manuals from distributor s page distributor s page product information operation installation manual url http global daikin com daikin global distributors_admin user_mng login php 58
- Off timer button 58
- On timer button 58
- Open the front cover 58
- Quiet button 58
- Reference refer to the following pages for detail 58
- Reset button 58
- Sensor button 58
- Timer cancel button 58
- Timer setting button 58
- Check 5 59
- Part 6 service diagnosis 59
- Problem symptoms and measures 2 3 service check function 3 4 troubleshooting 6 59
- Troubleshooting with led 1 59
- Capacitor voltage check 03 5 4 power module check 03 60
- Indoor unit 61
- Outdoor unit 61
- Troubleshooting with led 61
- Problem symptoms and measures 62
- Check method 1 1 when the timer cancel button is held down for 5 seconds 63
- Is displayed on the temperature display screen 63
- Note 1 a short beep or two consecutive beeps indicate non corresponding codes 2 to return to the normal mode hold the timer cancel button down for 5 seconds when the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 not all the error codes are displayed when you cannot find the error code try the check method 2 refer to page 54 63
- Press the timer cancel button repeatedly until a long beep sounds 63
- Service check function 63
- The code indication changes in the sequence shown below 63
- Timer cancel button 63
- Displayed only when system down occurs 66
- Error codes and description 66
- Troubleshooting 66
- Defective indoor unit pcb 67
- Disconnection of connector 67
- Error code 67
- Error decision conditions the system cannot set the internal settings 67
- Indoor unit pcb abnormality 67
- Method of error detection the system checks if the circuit works properly within the microcomputer of the indoor unit 67
- Note check the following connector 67
- Reduction of power supply voltage 67
- Supposed causes 67
- Troubleshooting 67
- Wrong models interconnected 67
- Check no 1 refer to p 5 68
- Clogged air filter of the indoor unit 68
- Defective indoor heat exchanger thermistor 68
- Defective indoor unit pcb 68
- Dust accumulation on the indoor heat exchanger 68
- Error code 68
- Error decision conditions 68
- 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 68
- Freeze up protection control during cooling operation the indoor heat exchanger temperature is below 0 c 68
- Freeze up protection control or heating peak cut control 68
- Heating peak cut control during heating operation the indoor heat exchanger temperature is above 65 c 68
- Heating peak cut control during heating operation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc 68
- Method of error detection 68
- Short circuited air 68
- Supposed causes 68
- Troubleshooting 68
- Fan motor dc motor or related abnormality 69
- Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 70
- Caution 70
- Check no 2 refer to p 6 70
- Service diagnosis 70
- Troubleshooting 70
- Troubleshooting sibe041029_a 70
- Thermistor or related abnormality indoor unit 71
- Refrigerant shortage 72
- Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 73
- Caution 73
- Check no 1 refer to p 5 73
- Check no 2 refer to p 7 73
- Service diagnosis 63 73
- Sibe041029_a troubleshooting 73
- Troubleshooting 73
- Low voltage detection or over voltage detection 74
- Caution be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 75
- Service diagnosis 65 75
- Sibe041029_a troubleshooting 75
- Troubleshooting 75
- Signal transmission error between indoor unit and outdoor unit 76
- Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 77
- Caution 77
- Check no 1 refer to p 6 77
- Service diagnosis 67 77
- Sibe041029_a troubleshooting 77
- Troubleshooting 77
- Signal transmission error on outdoor unit pcb rx50 60g2v1b 71 class only 78
- Defective indoor unit pcb 79
- Defective outdoor unit pcb 79
- Error code 79
- Error decision conditions the pair type and multi type are interconnected 79
- 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 79
- Supposed causes 79
- Troubleshooting 79
- Unspecified voltage between indoor unit and outdoor unit 79
- Wrong indoor unit pcb or outdoor unit pcb mounted 79
- Wrong models interconnected 79
- Wrong wiring of connecting wires 79
- Outdoor unit pcb abnormality 80
- Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 81
- Caution 81
- Service diagnosis 71 81
- Sibe041029_a troubleshooting 81
- Troubleshooting rx50 60g3v1b 81
- Ol activation compressor overload 82
- Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 83
- Caution 83
- Check no 1 refer to p 5 83
- Check no 2 refer to p 7 83
- Check no 3 refer to p 8 83
- Check no 4 refer to p 8 83
- Note ol q1l activating temperature 120 c ol q1l recovery temperature 95 c 83
- Service diagnosis 73 83
- Sibe041029_a troubleshooting 83
- Troubleshooting 83
- A compressor lock is detected by the current waveform generated when applying high frequency voltage to the motor 84
- Check no 5 refer to p 9 84
- Compressor harness disconnected 84
- Compressor lock 84
- Compressor locked 84
- Error code 84
- Error decision conditions 84
- If the error repeats the system is shut down 84
- Method of error detection a compressor lock is detected by checking the compressor running condition through the position detection circuit 84
- Reset condition continuous run for about 5 minutes without any other error 84
- Supposed causes 84
- Troubleshooting 84
- Check no 6 refer to p 00 85
- Dc fan lock 85
- Defective fan motor 85
- Defective outdoor unit pcb 85
- Disconnection of the fan motor 85
- Error code 85
- Error decision conditions 85
- Foreign matter stuck in the fan 85
- If the error repeats the system is shut down 85
- Method of error detection an error is determined with the high voltage fan motor rotation speed detected by the hall ic 85
- Reset condition continuous run for about 5 minutes without any other error 85
- Supposed causes 85
- The fan does not start in 30 seconds even when the fan motor is running 85
- Troubleshooting 85
- Check no 5 refer to p 9 86
- Check no 7 refer to p 01 86
- Check no 8 refer to p 01 86
- Defective compressor 86
- Defective outdoor unit pcb 86
- Defective power module 86
- Error code 86
- Error decision conditions the current exceeds about 20 a for 2 seconds with the compressor running the upper limit of the current decreases when the outdoor temperature exceeds a certain level 86
- Input overcurrent detection 86
- Method of error detection an input overcurrent is detected by checking the input current value with the compressor running 86
- Outdoor temperature is out of operation range 86
- Short circuit 86
- Supposed causes 86
- Troubleshooting 86
- Four way valve abnormality 87
- Caution be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 88
- Check no 1 refer to p 5 88
- Check no 3 refer to p 8 88
- Check no 4 refer to p 8 88
- Service diagnosis 88
- Troubleshooting 88
- Troubleshooting sibe041029_a 88
- Check no 1 refer to p 5 89
- Check no 2 refer to p 7 89
- Check no 4 refer to p 8 89
- Defective discharge pipe thermistor defective outdoor heat exchanger thermistor or outdoor temperature thermistor 89
- Defective electronic expansion valve or coil 89
- Defective four way valve 89
- Defective outdoor unit pcb 89
- Defective stop valve 89
- Discharge pipe temperature control 89
- Error code 89
- Error decision conditions 89
- If the error repeats the system is shut down 89
- If the temperature detected by the discharge pipe thermistor rises above a c the compressor stops 89
- Method of error detection an error is determined with the temperature detected by the discharge pipe thermistor 89
- Refrigerant shortage 89
- Reset condition continuous run for about 60 minutes without any other error 89
- Supposed causes 89
- The error is cleared when the discharge pipe temperature has dropped below b c 89
- Troubleshooting 89
- Water mixed in refrigerant 89
- Check no 1 refer to p 5 90
- Check no 2 refer to p 7 90
- Check no 7 refer to p 01 90
- Check no 8 refer to p 01 90
- Check no 9 refer to p 02 90
- Defective electronic expansion valve or coil 90
- Defective outdoor fan motor 90
- Defective outdoor heat exchanger thermistor 90
- Defective outdoor unit pcb 90
- Defective stop valve 90
- Dirty outdoor heat exchanger 90
- Error code 90
- Error decision conditions 90
- High pressure control in cooling 90
- 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 90
- Supposed causes 90
- The error is cleared when the temperature drops below about 50 c 90
- The installation space is not large enough 90
- The temperature sensed by the outdoor heat exchanger thermistor rises above about 60 65 c depending on the model 90
- Troubleshooting 90
- Compressor system sensor abnormality 91
- Defective compressor 91
- Defective outdoor unit pcb 91
- Disconnection of compressor harness 91
- Disconnection of reactor 91
- Error code 91
- Error decision conditions 91
- Method of error detection 91
- Rx50 60g2v1b 71 class 91
- Supposed causes 91
- The compressor current does not run when the compressor starts 91
- The power supply voltage and the dc voltage is obviously low or high 91
- The system checks the compressor current right after the compressor starts 91
- The system checks the power supply voltage and the dc voltage before the compressor starts 91
- Troubleshooting 91
- Broken or disconnected harness 92
- Defective outdoor unit pcb 92
- Error code 92
- Error decision conditions 92
- Method of error detection the system checks the dc current before the compressor starts 92
- Rx50 60g3v1b 92
- Supposed causes 92
- The dc current before compressor start up is out of the range 0 4 v sensor output converted to voltage value 92
- The dc voltage before compressor start up is below 50 v 92
- Troubleshooting 92
- Position sensor abnormality 93
- Caution be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 94
- Check no 5 refer to p 9 94
- Check no 8 refer to p 01 94
- Service diagnosis 94
- Troubleshooting rx50 60g2v1b 71 class 94
- Troubleshooting sibe041029_a 94
- Caution be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 95
- Check no 0 refer to p 02 95
- Check no 5 refer to p 9 95
- Check no 8 refer to p 01 95
- Service diagnosis 85 95
- Sibe041029_a troubleshooting 95
- Troubleshooting rx50 60g3v1b 95
- Ct or related abnormality rx50 60g2v1b 71 class only 96
- Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 97
- Caution 97
- Check no 1 refer to p 03 97
- Check no 5 refer to p 9 97
- Service diagnosis 87 97
- Sibe041029_a troubleshooting 97
- Troubleshooting 97
- Thermistor or related abnormality outdoor unit 98
- Caution 99
- Check no 1 refer to p 5 99
- Discharge pipe thermistor 99
- Outdoor heat exchanger thermistor 99
- Outdoor temperature thermistor 99
- Service diagnosis 89 99
- Sibe041029_a troubleshooting 99
- Troubleshooting in case of 99
- Check no 7 refer to p 01 100
- Check no 9 refer to p 02 100
- Defective outdoor fan motor 100
- Defective outdoor unit pcb 100
- Defective radiation fin thermistor 100
- Disconnection of connector 100
- Electrical box temperature rise 100
- Error code 100
- Error decision conditions 100
- Method of error detection an electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off 100
- Short circuit 100
- Supposed causes 100
- The error is cleared when the radiation fin temperature drops below b c 100
- 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 100
- Troubleshooting 100
- With the compressor off the radiation fin temperature is above a c 100
- Radiation fin temperature rise 101
- Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 102
- Caution 102
- Check no 7 refer to p 01 102
- Check no 9 refer to p 02 102
- Class 105 102
- Note refer to silicon grease on power transistor diode bridge on page 112 for detail 102
- Rx50 60g2v1b 105 rx50 60g3v1b 85 102
- Service diagnosis 102
- Troubleshooting 102
- Troubleshooting sibe041029_a 102
- Output overcurrent detection 103
- Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 104
- Caution 104
- Check no 2 refer to p 03 104
- Check no 5 refer to p 9 104
- Check no 7 refer to p 01 104
- Check no 8 refer to p 01 104
- Service diagnosis 104
- Troubleshooting 104
- Troubleshooting sibe041029_a 104
- Check no 1 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 105
- Thermistor resistance check 105
- When the connector of indoor heat exchanger thermistor is soldered on the pcb remove the thermistor and measure the resistance 105
- When the room temperature thermistor is directly mounted on the display pcb remove the display pcb from the control pcb to measure the resistance 105
- Check no 1 measure the power supply waveform between no 1 and no 2 on the terminal board and check the waveform disturbance 106
- Check no 2 1 check the connection of connector 2 check the motor power supply voltage output pins 4 7 3 check the motor control voltage pins 4 3 4 check the rotation command voltage pins 4 2 5 check the rotation pulse pins 4 1 106
- Check sibe041029_a 106
- Check to see if the power supply waveform is a sine wave fig 106
- Check to see if there is waveform disturbance near the zero cross sections circled in fig 106
- Fan motor connector output check 106
- Fig fig 106
- Power supply waveforms check 106
- Service diagnosis 106
- Check no 2 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 the continuity between the pins 1 6 3 6 2 5 4 5 between the pins 1 6 2 6 3 6 4 6 for the harness 5p models if there is no continuity between the pins the ev coil is faulty 107
- Electronic expansion valve check 107
- If the continuity is confirmed in step 3 the outdoor unit pcb is faulty 107
- Note please note that the latching sound varies depending on the valve type 107
- Service diagnosis 97 107
- Sibe041029_a check 107
- Check no 3 108
- Check no 4 108
- Check sibe041029_a 108
- Four way valve performance check 108
- Inverter units refrigerant system check 108
- Service diagnosis 108
- Inverter analyzer check 109
- Rotation pulse check on the outdoor unit pcb 110
- Check no 7 111
- Check no 8 111
- Discharge pressure check 111
- Installation condition check 111
- Service diagnosis 101 111
- Sibe041029_a check 111
- Main circuit short check 112
- Outdoor fan system check 112
- Capacitor voltage check 113
- Check no 1 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 113
- Check no 2 113
- Disconnect the compressor harness connector from the outdoor unit pcb to disengage the connector press the protrusion on the connector 113
- Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multi tester evaluate the measurement results referring to the following table 113
- Note check to make sure that the voltage between and of the power module is approx 0 v before checking 113
- Power module check 113
- Rx50 60g2v1b 71 class 114
- Rx50 60g3v1b 114
- Part 7 trial operation and field settings 115
- Pump down operation 06 2 forced cooling operation 07 3 trial operation 08 4 field settings 09 115
- Silicon grease on power transistor diode bridge 12 115
- 60 class 71 class 116
- 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 116
- Outline in order to protect the environment be sure to conduct pump down operation when relocating or disposing the unit 116
- Pump down operation 116
- Pump down operation sibe041029_a 116
- Refer to page 107 for forced cooling operation 116
- Trial operation and field settings 116
- Caution when pressing the button do not touch the terminal board it has a high voltage and may cause electric shock 117
- Forced cooling operation 117
- Indoor unit 117
- Outdoor unit rx50 60g2v1b 71 class 117
- Outdoor unit rx50 60g3v1b 117
- Trial operation 118
- Field settings 119
- When 2 units are installed in 1 room 119
- Facility setting switch cooling at low outdoor temperature 120
- Caution replace the pcb if you accidentally cut a wrong jumper jumpers are necessary for electronic circuit improper operation may occur if you cut any of them 121
- For the location of the jumper refer to page 10 121
- For the location of the switch jumper refer to page 13 15 121
- Indoor unit 121
- Jumper and switch settings 121
- Outdoor unit 121
- Silicon grease on power transistor diode bridge 122
- Part 8 appendix 123
- Piping diagrams 14 123
- Removal procedure booklet no 19 123
- Wiring diagrams 16 123
- Appendix 124
- Ftx50 60gv1b ftx71gv1b 124
- Indoor unit 124
- Outdoor unit 124
- Piping diagrams 124
- Piping diagrams sibe041029_a 124
- Rx50 60g2v1b 124
- Appendix 115 125
- Rx50 60g3v1b 125
- Rx71gv1b rx71gv1b9 125
- Sibe041029_a piping diagrams 125
- Appendix 126
- Ftx50 60 71gv1b 126
- Indoor unit 126
- Outdoor unit 126
- Rx50g2v1b 126
- Wiring diagrams 126
- Wiring diagrams sibe041029_a 126
- Appendix 117 127
- D050706m 127
- D079016 127
- Indoor 127
- Outdoor 127
- Rx50 60g3v1b 127
- Rx60g2v1b 127
- Sibe041029_a wiring diagrams 127
- Appendix 128
- D053931l 128
- Rx71gv1b rx71gv1b9 128
- Wiring diagrams sibe041029_a 128
- Refer to the following booklets for removal procedure 129
- Removal procedure booklet no 129
- Revision history 130
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