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Daikin RXG25E2V1B [105/200] High pressure control in cooling
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Troubleshooting Si04-604
96 Service Diagnosis
4.17 High Pressure Control in Cooling
Remote
Controller
Display
F6
Method of
Malfunction
Detection
High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the
temperature being sensed by the heat exchanger thermistor exceeds the limit.
Malfunction
Decision
Conditions
Activated when the temperature being sensed by the heat exchanger thermistor rises above
65°C. (The error is cleared when the temperature drops below 54°C.)
Supposed
Causes
The installation space is not large enough.
Faulty outdoor unit fan
Faulty electronic expansion valve
Faulty defrost thermistor
Faulty outdoor unit PCB
Faulty stop valve
Dirty heat exchanger
Содержание
- Inverter pair 1
- Si04 604 1
- Wall mounted type e series 1
- Heat pump 2
- Indoor unit 2
- Inverter pair e series 2
- Outdoor unit 2
- Connector wiring diagram 1 3
- Control specification 1 3
- Function of thermistor 0 3
- Introduction v 3
- List of functions 3
- Main functions 8 3
- Part 1 list of functions 3
- Part 2 specifications 3
- Part 3 printed circuit board 3
- Part 4 function and control 7 3
- Printed circuit board connector wiring diagram 2 3
- Specifications 3
- Caution for diagnosis 2 2 problem symptoms and measures 3 3 service check function 4 4 troubleshooting 7 4
- Check 08 4
- Part 5 system configuration 5 4
- Part 6 service diagnosis 1 4
- System configuration 6 2 instruction 7 4
- Drawings flow charts v 5
- Index i 5
- Indoor unit 16 5
- Others 78 5
- Outdoor unit 56 5
- Part 7 removal procedure 15 5
- Part 8 others 77 5
- Part 9 appendix 81 5
- Piping diagrams 82 2 wiring diagrams 83 5
- Caution in repair 6
- Introduction 6
- Safety cautions 6
- Warning 6
- Cautions regarding products after repair 7
- Warning 7
- Caution 8
- Inspection after repair 8
- Warning 8
- Caution 9
- Icons are used to attract the attention of the reader to specific information the meaning of each icon is described in the table below 9
- Using icons 9
- Using icons list 9
- Warning 9
- List of functions 10
- Part 1 list of functions 10
- Holding functions no functions 11
- List of functions 11
- List of functions si04 604 11
- Holding functions no functions 12
- List of functions 3 12
- Si04 604 list of functions 12
- Part 2 specifications 14
- Specifications 14
- Hz 220 230 240v 60hz 220 230v 15
- Specifications 15
- Specifications si04 604 15
- Hz 220 230 240v 60hz 220 230v 16
- Si04 604 specifications 16
- Specifications 7 16
- Hz 220 230 240v 17
- Specifications 17
- Specifications si04 604 17
- Hz 220 230 240v 18
- Si04 604 specifications 18
- Specifications 9 18
- Hz 220 230 240v 19
- Specifications 19
- Specifications si04 604 19
- Part 3 printed circuit board connector wiring diagram 20
- Printed circuit board connector wiring diagram 2 20
- Indoor unit 21
- Printed circuit board connector wiring diagram 21
- Pcb 2 signal receiver pcb 22
- Pcb 3 intelligent eye sensor pcb 22
- Pcb detail pcb 1 control pcb indoor unit 22
- Printed circuit board connector wiring diagram 13 22
- Si04 604 printed circuit board connector wiring diagram 22
- Outdoor unit 23
- Pcb 2 filter pcb 24
- Pcb detail pcb 1 control pcb outdoor unit 24
- Printed circuit board connector wiring diagram 15 24
- Si04 604 printed circuit board connector wiring diagram 24
- Control specification 1 26
- Function of thermistor 0 26
- Main functions 8 26
- Part 4 function and control 26
- Additional control parameters 27
- Drawing of inverter the following drawing shows a schematic view of the inverter principle 27
- Forced cooling operation 27
- Frequency principle 27
- Frequency restrictions 27
- Initial settings 27
- Inverter principle to regulate the capacity a frequency control is needed the inverter makes it possible to vary the rotation speed of the compressor the following table explains the conversion principle 27
- Main control parameters the compressor is frequency controlled during normal operation the target frequency is set by the following 2 parameters coming from the operating indoor unit 27
- Main functions 27
- Note see the list of functions for the functions applicable to different models 27
- The difference between the room temperature and the set temperature 27
- The load condition of the operating indoor unit 27
- The target frequency is adapted by additional parameters in the following cases 27
- Comfortable air conditioning a detailed adjustment is integrated to ensure a fixed room temperature it is possible to air condition with a small room temperature variation 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 the high capacity is achieved it is maintained even when the outside temperature is 2 c 28
- For more information refer to forced operation mode on page 28
- Forced cooling operation 28
- Frequency limits the following table shows the functions that define 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 a quick set temperature 28
- The regulating capacity can be changed according to the changes in the outside temperature and cooling heating load 28
- Power airflow flap wide angle louvres and auto swing 29
- Control flow 30
- Function and control 21 30
- Making the fan rotate when the flap passes over the fan banned area 30
- Opening the flap fully 30
- Opening the front panel fully 30
- Operation starting control 30
- Output of the d signal after the front panel starts moving 30
- Running 30
- Si04 604 main functions 30
- The system carries out the following control at the beginning to conduct every functional parts properly 1 opening the front panel fully 2 output of the d signal after the front panel starts moving 3 opening the flap fully after the front panel opens fully 4 making the fan rotate when the flap passes over the fan banned area 30
- Timing chart 30
- 35kw class 830 980 rpm during powerful operation 1030 rpm 31
- Automatic air flow control for cooling 31
- Automatic air flow control for heating 31
- Control mode the airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature this is done through phase control and hall ic control 31
- Fan speed control for indoor units 31
- For more information about hall ic refer to the troubleshooting for fan motor on page 81 31
- Function and control 31
- Ll cooling thermostat off sl silent l ml m mh h hh powerful 31
- Main functions si04 604 31
- Note 1 during powerful operation fan operates h tap 50 70 rpm 2 fan stops during defrost operation 31
- Phase steps phase control and fan speed control contains 9 steps lll ll sl l ml m mh h and hh 31
- Step cooling heating dry mode lll heating thermostat off 31
- The following drawing explains the principle for fan speed control for heating 31
- The following drawing explains the principle of fan speed control for cooling 31
- Within this range the airflow rate is automatically controlled when the fan setting button is set to automatic 31
- In case of inverter units the microcomputer automatically sets the temperature and fan settings the difference between the room temperature at startup and the temperature set by the microcomputer is divided into two zones then the unit operates in the dry mode with an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level 32
- Programme dry function 32
- Programme dry function removes humidity while preventing the room temperature from lowering since the microcomputer controls both the temperature and air flow volume the temperature adjustment and fan adjustment buttons are inoperable in this mode 32
- Automatic operation 33
- Cooling dry 34
- Function and control 25 34
- Heating 34
- Si04 604 main functions 34
- The monitoring time has passed while the temperature difference is in the zone b cooling dry 10 minutes heating 10 seconds 34
- The operation turns on in any zones except a 34
- The system resumes from defrost control in any zones except a 34
- The temperature difference is above the zone c after being in the zone a 34
- The temperature difference is in the zone a 34
- Thermostat control 34
- Thermostat control is based on the difference between the room temperature and the setpoint 34
- Thermostat off condition 34
- Thermostat on condition 34
- Night set mode 35
- A microcomputer in an indoor unit carries out a sampling every 20 msec and if it detects 10 cycles of the wave in one second in total corresponding to 20msec 10 100msec it judges human is in the room as the motion signal is on 36
- Function and control 27 36
- In case of fan mode the fan speed reduces by 60 rpm 36
- Intelligent eye 36
- Processing 1 detection method by intelligent eye 36
- Si04 604 main functions 36
- The motions for example in cooling 36
- This is the function that detects existence of humans in the room by a human motion sensor intelligent eye and reduces the capacity when there is no human in the room in order to save electricity 36
- This sensor detects human motion by receiving infrared rays and displays the pulse wave output 36
- When a microcomputer doesn t have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit in temperature shifted 2 c from the set temperature cool dry 2 c higher heat 2 c lower auto according to the operation mode at that time 36
- Details of the control when powerful button is pushed in each operation mode the fan speed setting temperature will be converted to the following states in a period of twenty minutes 37
- Ex powerful operation in cooling mode 37
- Inverter powerful operation 37
- Others 37
- 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 37
- Since the set temperature is shifted by 2 c higher for 40 minutes compressor speed becomes low and can realize energy saving operation but as thermostat is prone to be off by the fact that the set temperature has been shifted the thermostat off action is prohibited in 40 minutes so as to prevent this phenomena after this 40 minutes the prohibition of the thermostat off is cancelled and it can realize the conditions to conduct thermostat off depending on the room temperature in or after this forty minutes if the sensor detects human motion detection signal it let the set temperature and the fan speed return to the original set point keeping a normal operation 37
- The dry operation can t command the setting temperature with a remote controller but internally the set temperature is shifted by 1 c 37
- Auto restart function 38
- Hot start function 38
- Mold proof air filter 38
- On off button on indoor unit 38
- Other functions 38
- Self diagnosis digital display 38
- Signal receiving sign 38
- Titanium apatite photocatalytic air purifying filter 38
- Function of thermistor 39
- Heat pump model 39
- Control specification 40
- Detail 1 for heat pump model there are following modes stop cooling includes drying heating include defrosting 40
- Function and control 31 40
- Mode hierarchy 40
- Note unless specified otherwise an indoor dry operation command must be regarded as cooling operation 40
- Outline there are two modes the mode selected in user s place normal air conditioning mode and forced operation mode for installation and providing service 40
- Si04 604 control specification 40
- Frequency control 41
- Controls at mode changing start up 42
- Preheating operation 42
- 3 minutes standby 43
- Compressor protection function 43
- Four way valve operation compensation 43
- Four way valve switching 43
- Discharge pipe control 44
- Input current control 44
- Freeze up protection control 45
- Heating peak cut control 45
- Fan control 46
- Liquid compression protection function 2 46
- Control specification si04 604 47
- Defrost control 47
- Detail conditions for starting defrost the starting conditions must be made with the outdoor air temperature and heat exchanger temperature under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 44 minutes of accumulated time pass since the start of the operation or ending the defrosting conditions for canceling defrost the judgment must be made with heat exchanger temperature 4 c 22 c 47
- Function and control 47
- Outline heat pump only defrosting is carried out by the cooling cycle reverse cycle the defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing 47
- Detail the followings are the examples of control which function in each mode by the electronic expansion valve control 48
- Electronic expansion valve control 48
- Function and control 39 48
- 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 control when frequency changed 3 control for defrosting only for heat pump model 4 control when a discharge pipe temperature is abnormally high 5 control when the discharge pipe thermistor is disconnected feedback control 1 discharge pipe temperature control 48
- Si04 604 control specification 48
- Disconnection of the discharge pipe thermistor 49
- Fully closing with power on 49
- High temperature of the discharge pipe 49
- Opening limit 49
- Pressure equalization control 49
- Starting operation control 49
- Control when frequency is changed 50
- Target discharge pipe temperature control 50
- Detection of overload and over current 51
- Insufficient gas control 51
- Malfunctions 51
- Sensor malfunction detection 51
- Additional function 52
- Compressor operating frequency is increased to pi max max hz of operating room and outdoor unit airflow rate is increased 52
- Detail forced cooling 52
- Detail i judgment by power consumption when an output frequency is exceeds 55 hz and the input current is less than specified value the adjustment is made for insufficient gas 52
- Forced operation mode 52
- Ii judgment by discharge pipe temperature when discharge pipe temperature is 20 c higher than target value and the electronic expansion value opening is 450 pulses max the adjustment is made for insufficient gas 52
- Iii judgment by the difference of temperature when the difference of the temperature is smaller than it is regarded as insufficient gas 52
- Outline forced operating mode includes only forced cooling 52
- Power supply voltage is detected each time equipment operation starts 52
- Powerful operation mode 52
- Voltage detection function 52
- Part 5 system configuration 54
- System configuration 6 2 instruction 7 54
- System configuration 55
- Caution 56
- Instruction 56
- Safety precautions 56
- Warning 56
- Consider nuisance to your neighbours from noises 57
- Electrical work 57
- Installation site 57
- System relocation 57
- Indoor unit 58
- Names of parts 58
- Indoor unit 59
- Outdoor unit 59
- Remote controller 60
- Attention 61
- Preparation before operation 61
- To set the batteries 61
- Attention 62
- Caution 62
- Choose a place from where the signals reach the unit 62
- Place the remote controller in the remote controller holder 62
- Preparation before operation 62
- To fix the remote controller holder on the wall 62
- To operate the remote controller 62
- Turn on the power breaker 62
- Be careful not to cool heat the room too much keeping the temperature setting at a moderate level helps save energy cover windows with a blind or a curtain blocking sunlight and air from outdoors increases the cooling heating effect clogged air filters cause inefficient operation and waste energy clean them once in about every two weeks 63
- If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker off 63
- Operation outside this humidity or temperature range may cause a safety device to disable the system 63
- Press clock button 63
- The air conditioner always consumes 15 35 watts of electricity even while it is not operating 63
- To set the clock 63
- Use the air conditioner in the following conditions 63
- Auto dry cool heat fan operation 64
- Press mode selector button and select a operation mode 64
- Press on off button 64
- Press on off button again 64
- Press temperature adjustment button 64
- To change the temperature setting 64
- To start operation 64
- To stop operation 64
- Press fan setting button 65
- To change the air flow rate setting 65
- Adjusting the air flow detection 66
- Adjusting the air flow direction 66
- To 3 d airflow 66
- To adjust the horizontal blade flap 66
- To adjust the vertical blades louvers 66
- To cancel 3 d airflow 66
- Cool dry the flap will go up heat the flap will go down 67
- Press comfort airflow button 67
- Press comfort airflow button again 67
- The flap orientation will change preventing air from blowing directly on the occupants of the room 67
- To cancel comfort airflow operation 67
- To start comfort airflow operation 67
- Powerful operation 68
- To cancel powerful operation 68
- To start powerful operation 68
- Outdoor unit silent operation 69
- To cancel outdoor unit silent operation 69
- To start outdoor unit silent operation 69
- Intelligent eye operation 70
- Press sensor button 70
- Press sensor button again 70
- To cancel the intelligent eye operation 70
- To start intelligent eye operation 70
- Caution 71
- Intelligent eye is useful for energy saving 71
- Notes on intelligent eye 71
- Timer operation 72
- To cancel the off timer operation 72
- To use off timer operation 72
- Attention 73
- Blinks 73
- Is displayed 73
- Press cancel button 73
- Press on timer button 73
- Press on timer button again 73
- Press timer setting button until the time setting reaches the point you like 73
- To cancel on timer operation 73
- To combine on timer and off timer 73
- To use on timer operation 73
- Care and cleaning 74
- Caution 74
- Front panel 74
- Indoor unit outdoor unit and remote controller 74
- Air filter 75
- Filters 75
- Maintenance 75
- Replacement 75
- Titanium apatite photocatalytic air purifying filte 75
- After operation stops turn off the breaker for the room air conditioner 76
- Before a long idle period 76
- Clean the air filters and set them again 76
- Operate the fan only for several hours on a fine day to dry out the inside 76
- Take out batteries from the remote controller 76
- Case explanation 77
- These cases are not troubles 77
- Trouble shooting 77
- Troubleshooting 77
- Case check 78
- Check again 78
- Call the service shop immediately 79
- Disposal requirements 79
- Warning 79
- We recommend periodical maintenance 79
- Caution for diagnosis 2 2 problem symptoms and measures 3 3 service check function 4 4 troubleshooting 7 80
- Check 08 80
- Part 6 service diagnosis 80
- Caution for diagnosis 81
- Indicator lamps 81
- Problem symptoms and measures 82
- Arc433a4 83
- Check method 1 1 when the timer cancel button is held down for 5 seconds a 00 indication flashes on the temperature display section 83
- In the arc433a series remote controller the temperature display sections on the main unit indicate corresponding codes 83
- Note 1 a short beep and two consecutive beeps indicate non corresponding codes 2 to cancel the code display hold the timer cancel button down for 5 seconds the code display also cancels itself if the button is not pressed for 1 minute 83
- Press the timer cancel button repeatedly until a continuous beep is produced 83
- Service check function 83
- The code indication changes in the sequence shown below and notifies with a long beep 83
- Displayed only when system down occurs 86
- Error codes and description 86
- Troubleshooting 86
- Indoor unit pcb abnormality 87
- Freeze up protection control or high pressure control 88
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 89
- Check no 6 refer to p 10 89
- Service diagnosis 89
- Troubleshooting 89
- Troubleshooting si04 604 89
- Fan motor dc motor or related abnormality 90
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 91
- Check no 1 refer to p 08 91
- Service diagnosis 91
- Troubleshooting 91
- Troubleshooting si04 604 91
- Thermistor or related abnormality indoor unit 92
- 1 pull the plug out or turn the breaker off 2 remove the decorative plate 3 remove the slot in panel 4 put the plug in or turn the breaker on wait until the initialization finishes 5 operate the unit by the indoor unit on off switch 93
- Front panel open close fault 93
- Malfunction decision conditions 93
- Malfunction of the limit switch 93
- Malfunction of the reduction motor 93
- Malfunction or deterioration of the front panel mechanism 93
- Method of malfunction detection 93
- Remote controller display 93
- Service diagnosis 93
- Supposed causes 93
- The system will be shut down when the error occurs twice 93
- Troubleshooting 93
- Troubleshooting si04 604 93
- Check no 0 refer to p 13 94
- Faulty indoor unit pcb 94
- Faulty outdoor unit pcb 94
- Indoor unit outdoor unit signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units wire no 2 94
- Indoor unit outdoor unit signal transmission error due to disturbed power supply waveform 94
- Indoor unit outdoor unit signal transmission error due to wiring error 94
- Malfunction decision conditions 94
- Method of malfunction detection 94
- Remote controller display 94
- Service diagnosis 85 94
- Si04 604 troubleshooting 94
- Signal transmission error between indoor and outdoor unit 94
- Supposed causes 94
- The data received from the outdoor unit in indoor unit outdoor unit signal transmission is checked whether it is normal 94
- Troubleshooting 94
- When the data sent from the outdoor unit cannot be received normally or when the content of the data is abnormal 94
- Signal transmission error between indoor unit and wired remote controller 95
- Unspecified voltage between indoor and outdoor unit 96
- Outdoor unit pcb abnormality 97
- A compressor overload is detected through compressor ol 98
- Check no 1 refer to p 13 98
- Check no 4 refer to p 08 98
- Check no 5 refer to p 09 98
- Check no 6 refer to p 10 98
- Electronic expansion valve defective 98
- Four way valve malfunctioning 98
- If the compressor ol is activated twice the system will be shut down 98
- Malfunction decision conditions 98
- Method of malfunction detection 98
- Ol activation compressor overload 98
- Outdoor unit pcb defective 98
- Refrigerant shortage 98
- Remote controller display 98
- Service diagnosis 89 98
- Si04 604 troubleshooting 98
- Stop valve defective 98
- Supposed causes 98
- The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time the operating temperature condition is not specified 98
- Troubleshooting 98
- Water mixed in the local piping 98
- A compressor lock is detected by checking the compressor running condition through the position detection circuit 99
- Clearing condition continuous run for about 10 minutes normal 99
- Compressor harness disconnected 99
- Compressor lock 99
- Compressor locked 99
- Malfunction decision conditions 99
- Method of malfunction detection 99
- Note if the model doesn t have spm replace the outdoor unit pcb 99
- Remote controller display 99
- Service diagnosis 99
- Supposed causes 99
- The system judges the compressor lock and cannot operation with position detection within 15 seconds after start up 99
- The system judges the compressor lock and stops due to over current 99
- The system will be shut down if the error occurs 16 times 99
- Troubleshooting 99
- Troubleshooting si04 604 99
- Dc fan lock 100
- An input over current is detected by checking the input current value with the compressor running 101
- Check no 7 refer to p 11 101
- Check no 8 refer to p 12 101
- Error detection due to outdoor unit pcb 101
- Heating above 12a 101
- Input over current detection 101
- Malfunction decision conditions 101
- Method of malfunction detection 101
- Note if the model doesn t have spm replace the outdoor unit pcb 101
- Over current due to compressor failure 101
- Over current due to defective outdoor unit pcb 101
- Over current due to defective power transistor 101
- Over current due to short circuit 101
- Remote controller display 101
- Service diagnosis 101
- Supposed causes 101
- The following current with the compressor running continues for 2 seconds coolin 101
- Troubleshooting 101
- Troubleshooting si04 604 101
- Four way valve abnormality 102
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 103
- Check no 1 refer to p 13 103
- Check no 5 refer to p 09 103
- Check no 6 refer to p 10 103
- Service diagnosis 103
- Troubleshooting 103
- Troubleshooting si04 604 103
- 1 above 45hz rising above 40hz dropping 110 97 2 30 45hz rising 25 40hz dropping 105 92 3 below 30hz rising below 25hz dropping 99 86 104
- Check no 1 refer to p 13 104
- Check no 4 refer to p 08 104
- Check no 6 refer to p 10 104
- Discharge pipe temperature control 104
- Discharge pipe thermistor defective heat exchanger or outdoor air temperature thermistor defective 104
- Electronic expansion valve defective 104
- Four way valve malfunctioning 104
- If a stop takes place 4 times successively due to abnormal discharge pipe temperature the system will be shut down 104
- If the temperature being detected by the discharge pipe thermistor rises above c the compressor will stop the error is cleared when the temperature has dropped below c 104
- Malfunction decision conditions 104
- Method of malfunction detection 104
- Outdoor unit pcb defective 104
- Refrigerant shortage 104
- Remote controller display 104
- Service diagnosis 95 104
- Si04 604 troubleshooting 104
- Stop temperatures 104
- Stop valve defective 104
- Supposed causes 104
- The discharge pipe temperature control stop frequency drooping etc is checked with the temperature being detected by the discharge pipe thermistor 104
- The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time 104
- Troubleshooting 104
- Water mixed in the local piping 104
- High pressure control in cooling 105
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 106
- Check no 4 refer to p 08 106
- Check no 6 refer to p 10 106
- Check no 7 refer to p 11 106
- Check no 9 refer to p 12 106
- Service diagnosis 97 106
- Si04 604 troubleshooting 106
- Troubleshooting 106
- Sensor abnormality around compressor system 107
- A compressor startup failure is detected by checking the compressor running condition through the position detection circuit 108
- Check no 3 refer to p 14 108
- Clearing condition continuous run for about 10 minutes normal 108
- Compressor itself defective 108
- Compressor relay cable disconnected 108
- Input voltage out of specification 108
- Malfunction decision conditions 108
- Method of malfunction detection 108
- Outdoor unit pcb defective 108
- Position sensor abnormality 108
- Remote controller display 108
- Service diagnosis 99 108
- Si04 604 troubleshooting 108
- Stop valve closed 108
- Supposed causes 108
- The compressor fails to start in about 15 seconds after the compressor run command signal is sent 108
- The system will be shut down if the error occurs 16 times 108
- Troubleshooting 108
- Dc voltage current sensor abnormality 109
- J3 j6 h9 110
- Thermistor or related abnormality outdoor unit 110
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 111
- Check no 6 refer to p 10 111
- Discharge pipe thermistor 111
- Outdoor air temperature thermistor 111
- Outdoor heat exchanger thermistor 111
- Service diagnosis 111
- Troubleshooting 111
- Troubleshooting si04 604 111
- Output over current detection 112
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 113
- Check no 3 refer to p 14 113
- Check no 7 refer to p 11 113
- Check no 8 refer to p 12 113
- Note if the model doesn t have spm replace the outdoor unit pcb 113
- Service diagnosis 113
- Troubleshooting 113
- Troubleshooting si04 604 113
- Insufficient gas 114
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 115
- Check no 4 refer to p 08 115
- Check no 6 refer to p 10 115
- Service diagnosis 115
- Troubleshooting 115
- Troubleshooting si04 604 115
- An abnormal voltage rise is detected by checking the specified over voltage detection circuit 116
- An over voltage signal is fed from the over voltage detection circuit to the microcomputer the voltage is over 400v 116
- Clearing condition continuous run for about 10 minutes normal 116
- Malfunction decision conditions 116
- Method of malfunction detection 116
- Note if the model doesn t have spm replace the outdoor unit pcb 116
- Over voltage detection 116
- Over voltage detection circuit defective 116
- Pam control part s defective 116
- Remote controller display 116
- Service diagnosis 107 116
- Si04 604 troubleshooting 116
- Supply voltage not as specified 116
- Supposed causes 116
- The system will be shut down if the error occurs 255 times 116
- Troubleshooting 116
- Electronic expansion valve check 117
- Fan motor connector output check 117
- How to check 117
- Check no 5 118
- Four way valve performance check 118
- Service diagnosis 109 118
- Si04 604 check 118
- Check no 6 remove the connectors of the thermistors on the pcb and measure the resistance of each thermistor using tester the relationship between normal temperature and resistance is shown in the graph and the table below 119
- Thermistor resistance check 119
- Check no 7 120
- Installation condition check 120
- Service diagnosis 111 120
- Si04 604 check 120
- Check no 8 121
- Check no 9 121
- Check si04 604 121
- Discharge pressure check 121
- Outdoor unit fan system check with dc motor 121
- Service diagnosis 121
- Check no 0 measure the power supply waveform between pins 1 and 3 on the terminal board and check the waveform disturbance 122
- Check no 1 122
- Check to see if the power supply waveform is a sine wave fig 122
- Check to see if there is waveform disturbance near the zero cross sections circled in fig 122
- Fig fig 122
- Inverter units refrigerant system check 122
- Power supply waveforms check 122
- Service diagnosis 113 122
- Si04 604 check 122
- Check no 3 123
- Disconnect the compressor harness connector from the outdoor unit pcb to disengage the connector press the protrusion on the connector then follow the procedure below to measure resistance between power transistor and and the u v and w terminals of the compressor connector with a multi tester evaluate the measurement results for a pass fail judgment 123
- If the fuse is blown out the outdoor unit fan may also be in trouble check the fan too if the voltage in step 2 is not applied it means the pcb is defective replace the pcb if the pulse in step 4 is not available it means the hall ic is defective replace the dc fan motor if there are both the voltage 2 and the pulse 4 replace the pcb 123
- Make sure the voltage of 270 30v is being applied 1 stop the operation first and then the power off and disconnect the connector s70 2 make sure there is about dc 270 v between pins 4 and 7 3 with the system and the power still off reconnect the connector s70 4 make a turn of the fan motor with a hand and make sure the pulse 0 15 v appears twice at pins 1 and 4 123
- Note check to make sure that the voltage between the terminal of power transistor and is approx 0 volt before checking power transistor 123
- Power transistor check 123
- Propeller fan motor s70 123
- Turning speed pulse input on the outdoor unit pcb check 123
- Indoor unit 16 124
- Outdoor unit 56 124
- Part 7 removal procedure 124
- Indoor unit 125
- Removal of air filter 125
- Removal of front grille 127
- Loosen the screw on the fixing plate 130
- Pull down and remove the service cover of electrical box 130
- Push the white section on the terminal board and release the relay wires 130
- Removal of assembly of front panel mechanism 133
- Loosen the 2 screws of the assembly right 134
- Remove the assembly 134
- When assembling insert the lower rack plate first 134
- Removal of lamp cover 136
- Removal of horizontal blade 137
- Removal of reduction motor 139
- Loosen the screw 140
- Remove the reduction motor 140
- Undo the one hook in the center 140
- Undo the one hook on the opposite upper side 140
- Hold the cog horizontally and open the motor side toward up 141
- Layout of the harness of the motor 141
- Lift and remove the reduction motor 141
- Pull and disconnect the connector for the motor 141
- Removal of outlet grille 142
- Removal of vertical blades and swing motor 143
- Disconnect the connector for the swing motor 145
- Loosen the screw and remove the swing motor 145
- Peel the fixing tape 145
- Remove the swing motor 145
- Disconnect the connector for the swing motor 146
- Loosen the screw and pull out the swing motor 146
- The projection is fragile be careful so as not to break it 146
- Removal of electrical box 147
- Layout of the wiring 148
- Loosen the screw of the earth 148
- Push the hook on the right side and remove the electrical box cover 148
- Layout of the lead wire for the heat exchanger thermistor 151
- Loosen the screw of the electrical box 151
- Tilt the front part of the electrical box to the right slightly and pull it out 151
- When assembling push the electrical box upright and make sure to fit the hook on the backside 152
- Removal of pcb 153
- Loosen the screws of the earth 154
- Release the front hook and the 2 upper hooks and remove the shelter 154
- Layout of the wiring 155
- Loosen the screw and pull out the terminal board 155
- Control pcb 157
- Indoor unit si04 604 157
- Loosen the 2 screws and remove the pcb 157
- Procedure points 157
- Release the hooks and draw out the harness from the ditch 157
- Removal procedure 157
- Removal of heat exchanger 159
- Removal of fan rotor and fan motor 162
- Lift up the right part of the fan rotor and motor and slide them to the rightward to remove 163
- Remove the bearing 163
- Hold the lower outside of the bearing push it inwards and lift to release the hook 164
- Loosen the fixing screw and remove the fan motor 164
- Remove the fan motor 164
- Outdoor unit 165
- Removal of panels and fan motor 165
- Dc fan motor 169
- Loosen the 2 screws to remove the fan motor fixing frame 169
- Loosen the 4 screws to remove the fan motor 169
- Loosen the 2 screws on the rear side 170
- Loosen the 3 screws on the right side 170
- Loosen the screw and lift the connection port to remove 170
- Remove the right side panel 170
- When assembling make sure to fit the hook 171
- Removal of electrical box 172
- Removal of reactor and partition plate 174
- Removal of sound blanket 176
- Pull the sound blanket bottom out 177
- Pull the sound blanket inner out 177
- Since the piping ports on the sound blanket are torn easily remove the blanket carefully 177
- Removal of four way valve 178
- Removal of compressor 180
- Heat up the brazed part of the suction side and disconnect 181
- Lift the compressor up and remove it 181
- Removal of pcb 182
- Lift and pull out the pcb 183
- Loosen the 4 screws 183
- Undo the 3 hooks on the upper side 183
- Feature of the pcb s70 fan motor s80 four way valve s90 thermistor outdoor air heat exchanger discharge pipe 184
- Procedure points 184
- Removal procedure 175 184
- Si04 604 outdoor unit 184
- Others 78 186
- Part 8 others 186
- Others 187
- Test run from the remote controller 187
- Control pcb of the indoor unit 1 remove the front grille 3 screws 2 remove the electrical box 1 screw 3 remove the drip proof plate 4 tabs 4 cut the address jumper ja on the control pcb 188
- How to set the different addresses 188
- Jumper setting 188
- Jumper settings 188
- When two indoor units are installed in one room the two wireless remote controllers can be set for different addresses 188
- When two units are installed in one room 188
- Wireless remote controller 1 slide the front cover and take it off 2 cut the address jumper j4 188
- Part 9 appendix 190
- Piping diagrams 82 2 wiring diagrams 83 190
- Ftxg25 35evmaw s ftxg25 35ev1bw s atxg25 35ev1b 191
- Piping diagrams 191
- Rxg25 35evma rxg25 35e2v1b arxg25 35e2v1b 191
- Appendix 183 192
- Caution 192
- Fg f1u h2p h4p m1f m1s m2s m3s pcb1 pcb2 pcb3 r1t r2t s1 s51 s1w s2w x1m 192
- Field wiring 192
- Flame grund fuse pilot lamp fan motor swing motor printed circuit board thermistor connector operation switch panel limit switch terminal strip protective earth earth terminal shield plate earth terminal heat ex 192
- Ftxg25 35evmaw s ftxg25 35ev1bw s atxg25 35ev1b 192
- Indoor 192
- Intelligent eye sensor 192
- Note that operation will restart automatically if the main power supply is turned off and then back on again 192
- Outdoor 192
- Rectifier 192
- Refer to the nameplate for the power requirements 192
- Rxg25 35evma rxg25 35e2v1b arxg25 35e2v1b 192
- S21 ha 192
- S36 s36 192
- Si04 604 wiring diagrams 192
- Signal receiver 192
- Wht blk 192
- Wireless remote controller 192
- Wiring diagrams 192
- Numerics 194
- Drawings flow charts 198
- Cautions on product corrosion 200
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