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Daikin RXY32MTL [117/346] Low pressure protection control
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Protection Control Si38-304
106 Function
4.2 Low Pressure Protection Control
This low pressure protection control is used to protect compressors against the transient
decrease of low pressure.
[In cooling operation]
+
In the case of multi-outdoor-unit system, the entire system performs this control in the
following sequence.
[In heating operation]
+
In the case of multi-outdoor-unit system, each outdoor unit performs this control
individually in the following sequence.
Low pressure not limited
Pe<0.16MPa
Low pressure standby
Low pressure limited
All STD compressors
stop.
Master unit:52 Hz + OFF + OFF
Slave unit:Stop
Pe<0.12MPa
Pe>0.20MPa
Pe<0.01MPa
Pe: LP pressure sensor detection
value for master unit
When occurring 3 times within 30 min.,
the malfunction code “ E4 ” is output.
Pe<0.00 MPa
Pe<–0.02 MPa
Pe >0.04MPa
INV upper limit frequency = 210 Hz
Pe<–0.04 MPa
&
Low pressure not limited
Low pressure standby
Low pressure limited
124 Hz + OFF + OFF
INV upper limit frequency: 1-step /
20 sec up from current compressor
frequency
52 Hz + OFF + OFF
Pe: LP pressure sensor detection
value for each outdoor unit
Pe>0.04 MPa
Pe<0.00 MPa
When occurring 3 times within 30 min.,
the malfunction code “E4” is output.
Содержание
- Combination of outdoor units 4 capacity range 2
- Functional parts layout 0 2
- Introduction vi 2
- Model names of indoor outdoor units 2 external appearance 2
- Operation mode 6 2 basic control 7 2
- Part 1 general information 2
- Part 2 specifications 2
- Part 3 refrigerant circuit 3 2
- Part 4 function 5 2
- R22 heat pump cooling only 2
- R22 heat pump cooling only i 2
- Refrigerant circuit 4 2
- Refrigerant flow for each operation mode 3 2
- Special control 6 2
- Specifications 2
- Table of contents 2
- Other control 10 3
- Outdoor unit pc board layout 26 3 field setting 27 3
- Outline of control indoor unit 14 3
- Part 5 test operation 21 3
- Part 6 troubleshooting 63 3
- Protection control 05 3
- Test operation 22 3
- Troubleshooting by indication on the remote controller 78 3
- Troubleshooting by remote controller 65 3
- List of electrical and functional parts 98 5
- Option list 11 5
- Part 7 replacement procedure for inv compressor 5
- Part 8 appendix 63 5
- Piping diagrams 64 5
- Replacement procedure for inv compressor vrv ii rx y 5m 48m 62 5
- Troubleshooting op central remote controller 40 5
- Troubleshooting op schedule timer 46 5
- Troubleshooting op unified on off controller 53 5
- Vrv ii rx y 5m to 48m 61 5
- Wiring diagrams for reference 71 5
- Drawings flow charts v 6
- Index i 6
- Piping installation point 14 6
- Selection of pipe size joints and header 16 6
- Thermistor resistance temperature characteristics 21 8 pressure sensor 23 9 method of replacing the inverter s power transistors and diode modules 24 6
- Caution in repair 7
- Introduction 7
- Safety cautions 7
- Warning 7
- Caution 8
- Cautions regarding products after repair 8
- Warning 8
- Caution 9
- Inspection after repair 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
- Using icons 10
- Using icons list 10
- Preface 11
- Part 1 general information 12
- General information 13
- Indoor units 13
- Model names of indoor outdoor units 13
- Model names of indoor outdoor units si38 304 13
- Outdoor units inverter series 13
- Ceiling mounted built in type 14
- Ceiling mounted built in type rear suction type 14
- Ceiling mounted cassette corner type 14
- Ceiling mounted cassette type double flow 14
- Ceiling mounted cassette type multi flow 14
- Ceiling mounted duct type 14
- Ceiling mounted low silhouette duct type 14
- Ceiling suspended type 14
- Concealed floor standing type 14
- External appearance 14
- Floor standing type 14
- General information 3 14
- Indoor units 14
- Si38 304 external appearance 14
- Wall mounted type 14
- Outdoor units 15
- Combination of outdoor units 16
- Capacity range 17
- Capacity range si38 304 17
- General information 17
- Indoor units 17
- Outdoor units 17
- Part 2 specifications 18
- Specifications 18
- Outdoor units 19
- Specifications 19
- Si38 304 specifications 20
- Specifications 9 20
- Specifications 21
- Specifications si38 304 21
- Si38 304 specifications 22
- Specifications 11 22
- Specifications 23
- Specifications si38 304 23
- Si38 304 specifications 24
- Specifications 13 24
- Specifications 25
- Specifications si38 304 25
- Si38 304 specifications 26
- Specifications 15 26
- Specifications 27
- Specifications si38 304 27
- Si38 304 specifications 28
- Specifications 17 28
- Specifications 29
- Specifications si38 304 29
- Si38 304 specifications 30
- Specifications 19 30
- Specifications 31
- Specifications si38 304 31
- Si38 304 specifications 32
- Specifications 21 32
- Specifications 33
- Specifications si38 304 33
- Si38 304 specifications 34
- Specifications 23 34
- Specifications 35
- Specifications si38 304 35
- Si38 304 specifications 36
- Specifications 25 36
- Specifications 37
- Specifications si38 304 37
- Si38 304 specifications 38
- Specifications 27 38
- Specifications 39
- Specifications si38 304 39
- Si38 304 specifications 40
- Specifications 29 40
- Specifications 41
- Specifications si38 304 41
- Si38 304 specifications 42
- Specifications 31 42
- Specifications 43
- Specifications si38 304 43
- Si38 304 specifications 44
- Specifications 33 44
- Specifications 45
- Specifications si38 304 45
- Si38 304 specifications 46
- Specifications 35 46
- Specifications 47
- Specifications si38 304 47
- Si38 304 specifications 48
- Specifications 37 48
- Specifications 49
- Specifications si38 304 49
- Si38 304 specifications 50
- Specifications 39 50
- Specifications 51
- Specifications si38 304 51
- Ceiling mounted cassette type double flow 52
- Indoor units 52
- Si38 304 specifications 52
- Specifications 41 52
- Ceiling mounted cassette type double flow 53
- Specifications 53
- Specifications si38 304 53
- Ceiling mounted cassette type multi flow 54
- Si38 304 specifications 54
- Specifications 43 54
- Ceiling mounted cassette type multi flow 55
- Specifications 55
- Specifications si38 304 55
- Ceiling mounted cassette corner type 56
- Si38 304 specifications 56
- Specifications 45 56
- Ceiling mounted low silhouette duct type 57
- Specifications 57
- Specifications si38 304 57
- Ceiling mounted low silhouette duct type 58
- Si38 304 specifications 58
- Specifications 47 58
- Ceiling mounted built in type 59
- Specifications 59
- Specifications si38 304 59
- Ceiling mounted built in type 60
- Si38 304 specifications 60
- Specifications 49 60
- Ceiling mounted built in type 61
- Specifications 61
- Specifications si38 304 61
- Ceiling mounted built in rear suction type 62
- Si38 304 specifications 62
- Specifications 51 62
- Ceiling mounted built in rear suction type 63
- Specifications 63
- Specifications si38 304 63
- Ceiling mounted built in rear suction type 64
- Si38 304 specifications 64
- Specifications 53 64
- Ceiling mounted duct type 65
- Specifications 65
- Specifications si38 304 65
- Ceiling mounted duct type 66
- Si38 304 specifications 66
- Specifications 55 66
- Ceiling suspended type 67
- Specifications 67
- Specifications si38 304 67
- Si38 304 specifications 68
- Specifications 57 68
- Wall mounted type 68
- Specifications 69
- Specifications si38 304 69
- Wall mounted type 69
- Floor standing type 70
- Si38 304 specifications 70
- Specifications 59 70
- Floor standing type 71
- Specifications 71
- Specifications si38 304 71
- Concealed floor standing type 72
- Si38 304 specifications 72
- Specifications 61 72
- Concealed floor standing type 73
- Specifications 73
- Specifications si38 304 73
- Functional parts layout 0 74
- Part 3 refrigerant circuit 74
- Refrigerant circuit 4 74
- Refrigerant flow for each operation mode 3 74
- Refirgerant circuit 75
- Refrigerant circuit 75
- Refrigerant circuit si38 304 75
- Refirgerant circuit 77
- Refrigerant circuit si38 304 77
- Rxy8 10 12m 77
- Refirgerant circuit 67 78
- Rxy8 10 12m 78
- Si38 304 refrigerant circuit 78
- Refirgerant circuit 79
- Refrigerant circuit si38 304 79
- Rxy14 16m 79
- Refirgerant circuit 69 80
- Rxy14 16m 80
- Si38 304 refrigerant circuit 80
- Front view 81
- Functional parts layout 81
- Functional parts layout si38 304 81
- Refirgerant circuit 81
- Front view 82
- Rxy8 10 12m 82
- Front view 83
- Rxy14 16m 83
- Refirgerant circuit 73 84
- Refrigerant flow for each operation mode 84
- Rxy5m cooling operation 84
- Si38 304 refrigerant flow for each operation mode 84
- Cooling oil return operation 85
- Refirgerant circuit 85
- Refrigerant flow for each operation mode si38 304 85
- Heating oil return defrost operation 86
- Refirgerant circuit 75 86
- Si38 304 refrigerant flow for each operation mode 86
- Heating operation 87
- Refirgerant circuit 87
- Refrigerant flow for each operation mode si38 304 87
- Refirgerant circuit 77 88
- Rxy8 10 12m cooling operation 88
- Si38 304 refrigerant flow for each operation mode 88
- Cooling oil return 89
- Refirgerant circuit 89
- Refrigerant flow for each operation mode si38 304 89
- Heating oil return defrost 90
- Refirgerant circuit 79 90
- Si38 304 refrigerant flow for each operation mode 90
- Heating operation 91
- Refirgerant circuit 91
- Refrigerant flow for each operation mode si38 304 91
- Refirgerant circuit 81 92
- Rxy14 16m cooling operation 92
- Si38 304 refrigerant flow for each operation mode 92
- Cooling oil return operation 93
- Refirgerant circuit 93
- Refrigerant flow for each operation mode si38 304 93
- Heating oil return defrost operation 94
- Refirgerant circuit 83 94
- Si38 304 refrigerant flow for each operation mode 94
- Heating operation 95
- Refirgerant circuit 95
- Refrigerant flow for each operation mode si38 304 95
- Operation mode 6 2 basic control 7 96
- Other control 10 96
- Outline of control indoor unit 14 96
- Part 4 function 96
- Part 4 part 4 part 4 part 4 function function function function 96
- Protection control 05 96
- Special control 6 96
- Function 97
- In the event indoor unit stops or the thermostat turns off while in oil return operation or defrosting operation pump down residual operation is performed on completion of the oil return operation or defrosting operation 97
- Indoor unit stop or thermostat off 97
- Indoor unit thermostat on 97
- Malfunction standby 97
- Operation mode 97
- Operation mode si38 304 97
- Pump down residual operation 97
- Basic control 98
- Heating operation is not functional at an outdoor air temperature of 25 c or more 98
- Normal operation 98
- Compressor pi control 99
- Compressor pi control carries out the compressor capacity pi control to maintain te at constant during cooling operation and tc at constant during heating operation to ensure stable unit performance 99
- Cooling operation 99
- Heating operation 99
- Compressor operating priority 100
- Function 89 100
- In the case of combination of 3 outdoor units the above diagram shows master unit slave unit 1 and slave unit 2 from left to right compressors may operate in any pattern other than those mentioned above according to the operating status 100
- Si38 304 basic control 100
- Basic control si38 304 101
- Compressors are operated in the order of descending priorities compressors may operate in a pattern other than those listed in above tables subject to the operating conditions master unit and slave unit in this section are the names for control and they will be transferred according to the priority of rotation system 101
- Function 101
- Rx y 14 16m 101
- Rx y 18 20 22m 101
- Rx y 24 26 28m 101
- Rx y 5m 101
- Rx y 8 10 12m 101
- Compressors are operated in the order of descending priorities compressors may operate in a pattern other than those listed in above tables subject to the operating conditions master unit and slave unit in this section are the names for control and they will be transferred according to the priority of rotation system 102
- Function 91 102
- Rx y 30 32m 102
- Rx y 34 36 38m 102
- Si38 304 basic control 102
- Basic control si38 304 103
- Compressors are operated in the order of descending priorities compressors may operate in a pattern other than those listed in above tables subject to on the operating conditions master unit slave unit 1 and slave unit 2 in this section are the names for control and they will be transferred according to the priority of rotation system 103
- Function 103
- Rx y 40 42 44m 103
- Compressors are operated in the order of descending priorities compressors may operate in a pattern other than those listed in above tables subject to on the operating conditions master unit slave unit 1 and slave unit 2 in this section are the names for control and they will be transferred according to the priority of rotation system 104
- Function 93 104
- Rx y 46 48m 104
- Si38 304 basic control 104
- Electronic expansion valve pi control 105
- Main motorized valve ev1 control carries out the motorized valve y1e pi control to maintain the evaporator outlet superheated degree sh at constant during heating operation to make maximum use of the outdoor unit heat exchanger evaporator 105
- Subcooling motorized valve ev2 control makes pi control of the motorized valve y2e to keep the superheated degree of the outlet gas pipe on the evaporator side for the full use of the subcooling heat exchanger 105
- The optimum initial value of the evaporator outlet superheated degree is 5 c but varies depending on the discharge pipe superheated degree of inverter compressor 105
- Cooling operation fan control 106
- Fan steps 106
- Function 95 106
- In cooling operation with low outdoor air temperature this control is used to provide the adequate amount of circulation air with liquid pressure secured by high pressure control using outdoor unit fan 106
- Mpa pc 1 2mpa 106
- Pc 1 2mpa 106
- Pc 1 8mpa 106
- Pc hp pressure sensor detection value 106
- Si38 304 basic control 106
- In the case of multi outdoor unit system both master and slave units perform the operations listed in the table above actuators are based on rx y 16m 107
- In the case of multi outdoor unit system both master and slave units perform the operations listed in the table above actuators are based on rxy16m 107
- Special control 107
- Startup control 107
- Startup control in cooling operation 107
- Startup control in heating operation h p model only 107
- In the case of multi outdoor unit system master unit performs the operations listed in the table above slave units operating units perform the operations listed in the table above non operating units perform the operations listed in the table above from the oil return operation non operating unit stops during oil return preparation operation actuators are based on rx y 16m 108
- Oil return operation 108
- Oil return operation in cooling operation 108
- In the case of multi outdoor unit system master unit performs the operations listed in the table above slave units operating units perform the operations listed in the table above non operating units perform the operations listed in the table above from the oil return operation non operating unit stops during oil return preparation operation actuators are based on rxy16m 109
- Max 8 hours it will depend on the compressor frequency during operation however 2 hours after turning power on first time 109
- Oil return operation in heating operation h p model only 109
- Defrost operation is started when the outdoor heat exchanger temperature becomes lower than deicer temperature defrost operation is conducted once in max 2 hours 110
- Defrosting operatio 110
- H p model only 110
- In the case of multi outdoor unit system master unit performs the operations listed in the table above slave units operating units perform the operations listed in the table above non operating units perform the operations listed in the table above from the defrost operation non operating unit stops during defrost preparation operation actuators are based on rxy16m 110
- Pc 1 mpa 110
- Actuators are based on rx y 16m 111
- Actuators are based on rxy16m 111
- Pump down residual operation 111
- Pump down residual operation in cooling operation 111
- Pump down residual operation in heating operation h p model only 111
- Actuators are based on rx y 16m 112
- Restart standby 112
- Actuators are based on rx y 16m 113
- Stopping operation 113
- When system is in stop mode 113
- In cooling operation the system operates in mode a or mode b listed in the table below 114
- In heating operation the system operates in mode a or mode b listed in the table below h p model only 114
- Mode a operating unit collects refrigerant 114
- Mode a or b operation 114
- Mode b stopping unit storage refrigerant 114
- Stopping operation of slave units during master unit is in operation with multi outdoor unit system 114
- The changeover operation for mode a and b is performed for the reason that the required refrigerant amount varies depending on the indoor unit operation capacity 114
- Pressure equalization prior to startup 115
- High pressure protection control 116
- In cooling operation 116
- In heating operation 116
- In the case of multi outdoor unit system each outdoor unit performs this control individually in the following sequence 116
- In the case of multi outdoor unit system the entire system performs this control in the following sequence 116
- Protection control 116
- This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure 116
- In cooling operation 117
- In heating operation 117
- In the case of multi outdoor unit system each outdoor unit performs this control individually in the following sequence 117
- In the case of multi outdoor unit system the entire system performs this control in the following sequence 117
- Low pressure protection control 117
- This low pressure protection control is used to protect compressors against the transient decrease of low pressure 117
- Discharge pipe protection control 118
- Each compressor performs the discharge pipe temperature protection control individually in the following sequence 118
- Inv compressor 118
- Std compressor 118
- This discharge pipe protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature 118
- In the case of multi outdoor unit system each inv compressor performs these controls in the following sequence 119
- Inv upper limit frequency 1 step 1 min up from current compressor frequency interval 119
- Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction or transient inverter overcurrent and fin temperature increase 119
- Inverter fin temperature control 119
- Inverter overcurrent protection control 119
- Inverter protection control 119
- Controls the crankcase heater to prevent refrigerant from remaining in the inverter and std compressor 120
- Crankcase heater control 120
- Std compressor overload protection 120
- Td compressor discharge pipe temperature 120
- This control is used to prevent abnormal heating due to overcurrent to the compressor resulting from failures of std compressor such as locking 120
- After oil return operation after defrosting operation at the beginning of the starting control 121
- Details of outdoor unit rotation in the case of multi outdoor unit system each outdoor unit is given an operating priority for the control outdoor unit rotation makes it possible to change the operating priority of outdoor units thus the system becomes free of compressors that stop over an extended period of time at the time of partial loading preventing unbalanced oil level 121
- Example the following diagram shows outdoor unit rotation in combination of 3 outdoor units 121
- In the case of multi outdoor unit system this outdoor unit rotation is used to prevent the compressor from burning out due to unbalanced oil level between outdoor units 121
- Master unit slave unit 1 and slave unit 2 in this section are the names for installation they are determined in installation work and not changed thereafter these names are different from master unit and slave unit for control the outdoor unit connected the control wires f1 and f2 for the indoor unit should be designated as master unit consequently the led display on the main pcb for master unit slave unit 1 and slave unit 2 do not change refer to the page 90 121
- Other control 121
- Outdoor unit rotation 121
- Timing of outdoor unit rotation 121
- 777777 122
- 7777777 7777 122
- 777779 122
- 777799 99 122
- Blink h1 122
- Emergency operation 122
- In the case of 1 outdoor unit system rx y 8 to 16m 122
- Led display 122
- Restrictions for emergency operation 122
- 777777 123
- 7777777 7777 123
- 7777777 7777 7 123
- 7777777 9 7777777 7 7777777 7 123
- 777779 123
- 77779 97 123
- 777797 123
- In the case of multi outdoor unit system rx y 18 to 48m 123
- 777777 124
- 7777777 7777 124
- 777779 124
- 777797 124
- Demand operation 124
- Heating operation prohibition 124
- Note reset the power supply during the outdoor unit is stopping to cancel the automatic backup operation forcibly 124
- Drain pump control 125
- Outline of control indoor unit 125
- Louver control for preventing ceiling dirt 127
- Thermostat sensor in remote controller 128
- Freeze prevention 130
- Outdoor unit pc board layout 26 3 field setting 27 132
- Part 5 test operation 132
- Test operation 22 132
- Check work prior to turn power supply on 133
- Follow the following procedure to conduct the initial test operation after installation 133
- Procedure and outline 133
- Test operation 133
- Turn power on 133
- 7777777 7777 7 134
- 7777777 9 7777777 7 7777777 7 134
- Check operation 134
- Confirmation on normal operation 135
- Be sure to push and hold the reset button for 5 seconds if not the addition cannot be recognized in this case the unit cannot be run for up to 12 minutes to automatically set the address indoor outdoor address etc status 136
- Caution when the 400 volt power supply is applyed to n phase by mistake replace inverter p c b a2p and control transformer t1r t2r in switch box together 136
- Operation when power is turned on 136
- Tap the reset button on the outdoor unit pc board operation becomes possible for about 2 minutes if you do not push the reset button the unit cannot be run for up to 10 minutes to automatically set master power status 136
- The unit cannot be run for up to 12 minutes to automatically set the master power and address indoor outdoor address etc status 136
- When an indoor unit or outdoor unit has been added or indoor or outdoor unit pc board has been changed 136
- When turning on power first time 136
- When turning on power the second time and subsequent 136
- 1 microcomputer normal monitor this monitor blinks while in normal operation and turns on or off when a malfunction occurs 137
- 2 set mode display led leds display mode according to the setting 137
- 3 mode setting switch used to change mode 137
- 4 local setting switch used to make local settings 137
- Outdoor unit pc board 137
- Outdoor unit pc board layout 137
- Field setting 138
- Field setting from remote controller 138
- Wireless remote controller indoor unit 139
- Brc2a51 140
- Group no setting by simplified remote controller 140
- Simplified remote controller 140
- Field setting si38 304 141
- Notes 1 settings are made simultaneously for the entire group however if you select the mode no inside parentheses you can also set by each individual unit setting changes however cannot be checked except in the individual mode for those in parentheses 2 the mode numbers inside parentheses cannot be used by wireless remote controllers so they cannot be set individually setting changes also cannot be checked 3 marked are factory set 4 do not make settings other than those described above nothing is displayed for functions the indoor unit is not equipped with 5 88 may be displayed to indicate the remote controller is resetting when returning to the normal mode 6 if the setting mode to equipped heat reclaim ventilation fan conducts the fan residual operation by linking to indoor unit 141
- Setting contents and code no vrv unit 141
- Test operation 141
- Applicable range of field setting 142
- Si38 304 field setting 142
- Test operation 131 142
- Auto restart after power failure reset 143
- Caution 1 the air conditioner starts operation suddenly after power failure reset or the main power supply turned on again consequently the user might be surprised with question for the reason why 143
- Detailed explanation of setting modes 143
- Fan speed changeover when thermostat is off by setting to set fan speed you can switch the fan speed to the set fan speed when the heating thermostat is off since there is concern about draft if using fan speed up when thermostat is off you should take the setup location into consideration 143
- Filter sign setting 143
- For the above reasons when the unit is set enabling to utilize auto restart function after power failure reset utmost care should be paid for the occurrence of the following situation 143
- For the air conditioners with no setting for the function same as factory setting the units will be left in the stop condition when the power supply is reset automatically after power failure reset or the main power supply is turned on again after once turned off however for the air conditioners with the setting the units may start automatically after power failure reset or the main power supply turned on again return to the same operation condition as that of before power failure 143
- If switching the filter sign on time set as given in the table below set time 143
- In the service work for example turning off the main power switch during the unit is in operation and turning on the switch again after the work is completed start the unit operation the fan rotates 143
- Setting table 143
- Ultra long life filter sign setting when a ultra long life filter is installed the filter sign timer setting must be changed 143
- Air flow adjustment ceiling height make the following setting according to the ceiling height the setting position no is set to 01 at the factory 144
- Air flow direction setting 144
- In the case of fxa fxh 144
- In the case of fxf100 125 144
- In the case of fxf25 80 144
- Set the air flow direction of indoor units as given in the table below set when optional air outlet blocking pad has been installed the second code no is factory set to 01 144
- Setting of air flow direction adjustment only the model fxk has the function when only the front flow is used sets yes no of the swing flap operation of down flow 144
- Setting table 144
- Air flow rate switching at discharge grille for field air flow rate switching when the optional parts high performance filter etc is installed sets to change fan speed for securing air flow rate follow the instruction manual for the optional parts to enter the setting numbers 145
- Setting of air flow direction adjustment range make the following air flow direction setting according to the respective purpose 145
- Setting table 145
- Centralized control group no setting 146
- Caution when turning the power supply on the unit may often not accept any operation while 88 is displaying after all indications were displayed once for about 1 minute on the liquid crystal display this is not an operative fault 147
- Field setting si38 304 147
- Group no setting example 147
- Test operation 147
- Contents of control modes 148
- Setting of operation control mode from remote controller local setting 148
- Do not select timer operation possible by remote controller if not using a remote controller operation by timer is impossible in this case 1 factory setting 149
- How to select operation mode whether operation by remote controller will be possible or not for turning on off controlling temperature or setting operation mode is selected and decided by the operation mode given on the right edge of the table below 149
- 7 7 7 7 7 7 7 150
- 7 7 7 7 7 7 9 150
- 7 8 7 7 7 7 8 150
- Caution 150
- Field setting from outdoor unit 150
- Field setting si38 304 151
- Mode changing procedure 151
- Monitor mode h1p blinks used to check the program made in setting mode 2 151
- Setting mode 1 h1p off initial status when normal used to select the cool heat setting also indicates during abnormal low noise control and demand control 151
- Setting mode 2 h1p on used to modify the operating status and to set program addresses etc usually used in servicing the system 151
- Test operation 151
- There are the following three setting modes 151
- A setting mode 1 152
- B setting mode 2 153
- 7 7 7 7 7 157
- 7 7 7 7 8 157
- 7 7 7 7 9 157
- 7 7 7 8 7 157
- 7 7 7 8 8 157
- 7 7 7 9 7 157
- 7 7 8 7 7 157
- 7 7 8 7 8 157
- 7 7 8 8 7 157
- 7 7 8 8 8 157
- 7 7 9 7 7 157
- 7 8 7 7 7 157
- 7 8 7 7 8 157
- 7 8 7 8 7 157
- 7 8 7 8 8 157
- 7 8 8 7 7 157
- 7 8 8 7 8 157
- 7 8 8 8 7 157
- 7 8 8 8 8 157
- 8 7 7 7 7 157
- 8 7 8 7 7 157
- 8 7 8 7 8 157
- 8 7 8 8 7 157
- 9 7 7 7 7 157
- C monitor mode 157
- Defrost select setting short 157
- Emg operation backup operation setting on 157
- Field setting si38 304 157
- Medium 157
- Number of units for sequential start 1 unit 157
- Setting item 0 display contents of number of units for sequential start and others 157
- Tc setting h 157
- Te setting h 157
- Test operation 157
- Cool heat mode switching 159
- Multi outdoor units connection 161
- Address setting for 163
- Set lower 5 digits with binary number no to no 1 163
- Setting of low noise operation and demand operation 164
- Image of operation in the case of a 165
- Image of operation in the case of a b 165
- Image of operation in the case of b 165
- Field setting si38 304 167
- Image of operation in the case of a 167
- Image of operation in the case of a and b 167
- Image of operation in the case of b 167
- Test operation 167
- Additional refrigerant charge total flow 170
- Setting of refrigerant additional charging operation 170
- Si38 304 field setting 170
- Test operation 159 170
- When additional refrigerant is not charged all with outdoor unit in stop mode operate the outdoor unit and charge the liquid refrigerant from the service port of liquid stop value the additional charging operation is activated by pushbutton switch on the outdoor unit pc board 170
- Setting of refrigerant recovery mode 171
- 3883333 172
- Check operation 172
- Check operation function 172
- In order to perform vacuuming operation at site fully open the expansion valves of indoor and outdoor units to turn on some solenoid valves 172
- Note be sure to disconnect the compressor wiring when conducting the check operation mentioned above when the output voltage is approx 50 v 10 hz and the voltage balance between phases u v v w w u is within 5 the inverter pcb is normal 172
- Operating procedure 172
- Power transistor check operation 172
- Press mode button bs1 once and reset setting mode 2 172
- Setting of vacuuming mode 172
- To prevent any trouble in the period of installation at site the system is provided with a test operation mode enabling check for incorrect wiring stop valve left in closed coming out or misplacing with suction pipe thermistor of discharge pipe thermistor and judgment of piping length refrigerant overcharging and learning for the minimum opening degree of motorized valve 172
- Use the vacuum pump to perform vacuuming operation 172
- When the inverter system malfunctions malfunction of inverter inv compressor to locate where the malfunction occurs switching to the power transistor check mode of inverter in the service mode setting enables not to judge the position detection signal malfunction but to output waveform only during inverter operation the waveform can be checked by disconnecting the wiring of compressor 172
- With setting mode 2 while the unit stops set b refrigerant recovery vacuuming mode to on the expansion valves of indoor and outdoor units fully open and some of solenoid valves open h2p blinks to indicate the test operation and the remote controller displays test operation and in centralized control thus prohibiting operation after setting do not cancel setting mode 2 until completion of vacuuming operation 172
- Part 6 part 6 part 6 part 6 troubleshooting troubleshooting troubleshooting troubleshooting 174
- Part 6 troubleshooting 174
- Troubleshooting by indication on the remote controller 78 174
- Troubleshooting by remote controller 65 174
- Troubleshooting op central remote controller 40 175
- Troubleshooting op schedule timer 46 175
- Troubleshooting op unified on off controller 53 175
- Inspection mode 176
- Local setting mode service mode 176
- Normal mode 176
- Test operation mode 176
- The following modes can be selected by using the inspection test operation button on the remote control 176
- The inspection test button 176
- Troubleshooting by remote controller 176
- Self diagnosis by wired remote controller 177
- Self diagnosis by wireless remote controller 178
- The lower digit of the code changes as shown below when the up and down buttons are pressed 179
- Operation of the remote controller s inspection test operation button 181
- Troubleshooting 181
- Troubleshooting by remote controller si38 304 181
- Remote controller service mode 182
- Remote controller self diagnosis function 184
- The system operates for malfunction codes indicated in black squares however be sure to check and repair 186
- Detail description on next page 187
- Malfunction code indication by outdoor unit pcb 187
- Monitor mode 187
- Push the mode button bs1 and returns to setting mode 1 187
- Push the return button bs3 and switches to the initial status of monitor mode 187
- Push the return button bs3 once to display first digit of malfunction code 187
- Push the set button bs2 and set the led display to a setting item 187
- Push the set button bs2 once to display master or slave1 or slave2 and malfunction location 187
- Push the set button bs2 once to display second digit of malfunction code 187
- Refer p 24 for monitor mode 187
- To enter the monitor mode push the mode button bs1 when in setting mode 1 187
- Troubleshooting 187
- Troubleshooting by remote controller si38 304 187
- Actuation of external protection device 189
- Applicable models all indoor unit models 189
- Defect of indoor unit pc board 189
- Improper field set 189
- Indoor unit error of external protection device 189
- Malfunction decision conditions 189
- Method of malfunction detection 189
- Remote controller display 189
- Supposed causes 189
- Troubleshooting 189
- Troubleshooting by indication on the remote controller 189
- Indoor unit pc board defect 190
- Indoor unit malfunction of drain level control system 33h 191
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 192
- Si38 304 troubleshooting by indication on the remote controller 192
- Troubleshooting 192
- Troubleshooting 181 192
- Applicable models all indoor units 193
- Detection by failure of signal for detecting number of turns to come from the fan motor 193
- Disconnected or faulty wiring between fan motor and pc board 193
- Fan motor lock 193
- Indoor unit fan motor m1f lock overload 193
- Malfunction decision conditions 193
- Method of malfunction detection 193
- Remote controller display 193
- Supposed causes 193
- Troubleshooting 193
- When number of turns can t be detected even when output voltage to the fan is maximum 193
- Indoor unit malfunction of swing flap motor ma 194
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 195
- Troubleshooting 195
- Troubleshooting by indication on the remote controller si38 304 195
- Applicable models all indoor unit models 196
- Defect of connecting cable 196
- Defect of indoor unit pc board 196
- Detection by failure of signal for detecting number of turns to come from the fan motor 196
- Indoor unit malfunction of moving part of electronic expansion valve 20e 196
- Malfunction decision conditions 196
- Malfunction of moving part of electronic expansion valve 196
- Method of malfunction detection 196
- Remote controller display 196
- Supposed causes 196
- Troubleshooting 196
- When number of turns can t be detected even when output voltage to the fan is maximum 196
- 1 coil check method for the moving part of the electronic expansion valve discount the electronic expansion valve from the pc board and check the continuity between the connector pins 197
- Continuity no continuity 197
- Normal 197
- Indoor unit drain level above limit 198
- Indoor unit malfunction of capacity determination device 199
- 2 refer to thermistor resistance temperature characteristics table on p321 200
- Applicable models all indoor unit models 200
- Defect of indoor unit pc board 200
- Defect of thermistor r2t for liquid pipe 200
- Indoor unit malfunction of thermistor r2t for heat exchanger 200
- Malfunction decision conditions 200
- Malfunction detection is carried out by temperature detected by heat exchanger thermistor 200
- Method of malfunction detection 200
- Remote controller display 200
- Supposed causes 200
- Troubleshooting 200
- When the heat exchanger thermistor becomes disconnected or shorted while the unit is running 200
- 2 refer to thermistor resistance temperature characteristics table on p321 201
- Applicable models all indoor unit models 201
- Defect of indoor unit pc board 201
- Defect of indoor unit thermistor r3t for gas pipe 201
- Indoor unit malfunction of thermistor r3t for gas pipes 201
- Malfunction decision conditions 201
- Malfunction detection is carried out by temperature detected by gas pipe thermistor 201
- Method of malfunction detection 201
- Remote controller display 201
- Supposed causes 201
- Troubleshooting 201
- When the gas pipe thermistor becomes disconnected or shorted while the unit is running 201
- 2 refer to thermistor resistance temperature characteristics table on p321 202
- Applicable models aii indoor unit models 202
- Defect of indoor unit pc board 202
- Defect of indoor unit thermistor r1t for air inlet 202
- Indoor unit malfunction of thermistor r1t for suction air 202
- Malfunction decision conditions 202
- Malfunction detection is carried out by temperature detected by suction air temperature thermistor 202
- Method of malfunction detection 202
- Remote controller display 202
- Supposed causes 202
- Troubleshooting 202
- When the suction air temperature thermistor becomes disconnected or shorted while the unit is running 202
- Indoor unit malfunction of thermostat sensor in remote controller 203
- Outdoor unit pc board defect 204
- Outdoor unit actuation of high pressure switch 205
- 1 voltage measurement point 206
- 2 refer to pressure sensor pressure voltage characteristics table on p323 206
- Abnormal drop of low pressure refer to page106 for low pressure control 206
- Applicable models rx y 5 48m 206
- Defect of low pressure sensor 206
- Defect of outdoor unit pc board 206
- Error is generated when the low pressure is dropped under specific pressure 206
- Malfunction decision conditions 206
- Method of malfunction detection 206
- Outdoor unit actuation of low pressure sensor 206
- Remote controller display 206
- Stop valve is not opened 206
- Supposed causes 206
- Troubleshooting 206
- Applicable models rx y 5 48m 207
- Compressor lock 207
- Compressor motor lock 207
- Faulty inverter pc board 207
- High differential pressure 0 mpa or more 207
- Incorrect uvwn wiring 207
- Inverter pc board takes the position signal from uvwn line connected between the inverter and compressor and detects the position signal pattern 207
- Malfunction decision conditions 207
- Method of malfunction detection 207
- Remote controller display 207
- Stop valve is left in closed 207
- Supposed causes 207
- The position signal with 3 times cycle as imposed frequency is detected when compressor motor operates normally but 2 times cycle when compressor motor locks when the position signal in 2 times cycle is detected 207
- Troubleshooting 207
- Standard compressor motor overcurrent lock 208
- Applicable models rx y 5 48m 209
- Clearing condition operate for 5 minutes normal 209
- Fan does not run due to foreign matters tangled 209
- Malfunction decision conditions 209
- Malfunction of fan motor 209
- Malfunction of fan motor system is detected according to the fan speed detected by hall ic when the fan motor runs 209
- Malfunction of outdoor unit fan motor 209
- Method of malfunction detection 209
- Remote controller display 209
- Supposed causes 209
- The harness connector between fan motor and pc board is left in disconnected or faulty connector 209
- Troubleshooting 209
- When connector detecting fan speed is disconnected 209
- When malfunction is generated 4 times the system shuts down 209
- When the fan runs with speed less than a specified one for 15 seconds or more when the fan motor running conditions are met 209
- Note refer check 8 9 and 12 to p 5 210
- Si38 304 troubleshooting by indication on the remote controller 210
- Troubleshooting 210
- Troubleshooting 199 210
- Applicable models rx y 5 48m 211
- Check disconnection of connector check continuity of expansion valve coil 211
- Defect of connecting cable 211
- Defect of moving part of electronic expansion valve 211
- Defect of outdoor unit pc board a1p 211
- Error is generated under no common power supply when the power is on 211
- Malfunction decision conditions 211
- Method of malfunction detection 211
- Outdoor unit malfunction of moving part of electronic expansion valve y1e y2e 211
- Remote controller display 211
- Supposed causes 211
- Troubleshooting 211
- 1 coil check method for the moving part of the electronic expansion valve disconnect the electronic expansion valve from the pc board and check the continuity between the connector pins 212
- Continuity approx 150 ω no continuity 212
- Continuity approx 300 ω 212
- Normal 212
- Outdoor unit abnormal discharge pipe temperature 213
- Refrigerant overcharged 214
- Abnormal fan motor signal circuit malfunction 215
- Abnormal outdoor fan motor signal 215
- Applicable models rx y 5 48m 215
- Broken short or disconnection connector of fan motor connection cable 215
- Detection of abnormal signal from fan motor 215
- Disconnect connector x2a and measure the following resistance 215
- Fan inverter pc board malfunction 215
- In case of detection of abnormal signal at starting fan motor 215
- Malfunction decision conditions 215
- Method of malfunction detection 215
- Remote controller display 215
- Supposed causes 215
- Troubleshooting 215
- 2 refer to thermistor resistance temperature characteristics table on p321 216
- Applicable models rx y 5 48m 216
- Defect of outdoor unit pc board a1p 216
- Defect of thermistor r1t for outdoor air 216
- Malfunction decision conditions 216
- Method of malfunction detection 216
- Outdoor unit malfunction of thermistor for outdoor air r1t 216
- Remote controller display 216
- Supposed causes 216
- The abnormal detection is based on current detected by current sensor 216
- The alarm indicator is displayed when the fan only is being used also 216
- Troubleshooting 216
- When the outside air temperature sensor has short circuit or open circuit 216
- Applicable models rx y 5 48m 217
- Current sensor malfunction 217
- Faulty current sensor 217
- Faulty outdoor unit pc board 217
- Malfunction decision conditions 217
- Malfunction is detected according to the current value detected by current sensor 217
- Method of malfunction detection 217
- Remote controller display 217
- Supposed causes 217
- Troubleshooting 217
- When the current value detected by current sensor becomes 5a 400 v unit and 3a 200 v unit or lower during std compressor operation and 40a or more during std compressor stop 217
- Applicable models rx y 5 48m 218
- Defect of outdoor unit pc board a1p 218
- Defect of thermistor r31t r32t or r33t for outdoor unit discharge pipe 218
- Malfunction decision conditions 218
- Malfunction is detected from the temperature detected by discharge pipe temperature thermistor 218
- Method of malfunction detection 218
- Note 5 hp class r31t 8 12 hp class r31t r32t 14 16hp class r31t r32t and r33t 218
- Outdoor unit malfunction of discharge pipe thermistor r31 33t 218
- Remote controller display 218
- Supposed causes 218
- The alarm indicator is displayed when the fan is being used also 218
- Troubleshooting 218
- When a short circuit or an open circuit in the discharge pipe temperature thermistor is detected 218
- 2 refer to thermistor resistance temperature characteristics table on p321 219
- Applicable models rx y 5 48m 219
- Defect of outdoor unit pc board a1p 219
- Defect of thermistor r2t for outdoor unit suction pipe 219
- Malfunction decision conditions 219
- Malfunction is detected from the temperature detected by the suction pipe temperature thermistor 219
- Method of malfunction detection 219
- Outdoor unit malfunction of thermistor r2t for suction pipe 219
- Remote controller display 219
- Supposed causes 219
- Troubleshooting 219
- When a short circuit or an open circuit in the suction pipe temperature thermistor is detected 219
- 2 refer to thermistor resistance temperature characteristics table on p321 220
- Applicable models rx y 5 48m 220
- Defect of outdoor unit pc board a1p 220
- Defect of thermistor r4t for outdoor unit coil 220
- Malfunction decision conditions 220
- Malfunction is detected from the temperature detected by the heat exchanger thermistor 220
- Method of malfunction detection 220
- Outdoor unit malfunction of thermistor r4t for outdoor unit heat exchanger 220
- Remote controller display 220
- Supposed causes 220
- Troubleshooting 220
- When a short circuit or an open circuit in the heat exchange thermistor is detected 220
- 2 refer to thermistor resistance temperature characteristics table on p321 221
- Applicable models rx y 5 48m 221
- Faulty outdoor unit pc board 221
- Faulty receiver gas pipe thermistor r5t 221
- Malfunction decision conditions 221
- Malfunction is detected according to the temperature detected by receiver gas pipe thermistor subcooling heat exchanger gas pipe thermistor 221
- Malfunction of receiver gas pipe thermistor r5t 221
- Method of malfunction detection 221
- Remote controller display 221
- Supposed causes 221
- Troubleshooting 221
- When the receiver gas pipe thermistor is short circuited or open 221
- 1 voltage measurement point 222
- 2 refer to pressure sensor pressure voltage characteristics table on p323 222
- Applicable models rx y 5 48m 222
- Connection of low pressure sensor with wrong connection 222
- Defect of high pressure sensor system 222
- Defect of outdoor unit pc board 222
- Malfunction decision conditions 222
- Malfunction is detected from the pressure detected by the high pressure sensor 222
- Method of malfunction detection 222
- Outdoor unit malfunction of high pressure sensor 222
- Remote controller display 222
- Supposed causes 222
- Troubleshooting 222
- When the high pressure sensor is short circuit or open circuit 222
- Outdoor unit malfunction of low pressure sensor 223
- 2 refer to thermistor resistance temperature characteristics table on p321 224
- Actuation of fin thermal actuates above 89 c 224
- Applicable models rx y 5 48m 224
- Defect of fin thermistor 224
- Defect of inverter pc board 224
- Fin temperature is detected by the thermistor of the radiation fin 224
- Malfunction decision conditions 224
- Method of malfunction detection 224
- Outdoor unit malfunction of inverter radiating fin temperature rise 224
- Remote controller display 224
- Supposed causes 224
- Troubleshooting 224
- When the temperature of the inverter radiation fin increases above 89 c 224
- Applicable models rx y 5 48m 225
- Compressor start up malfunction mechanical lock 225
- Defect of compressor coil disconnected defective insulation 225
- Defect of inverter pc board 225
- Higher voltage than actual is displayed when the inverter output voltage is checked by tester 225
- Malfunction decision conditions 225
- Malfunction is detected from current flowing in the power transistor 225
- Method of malfunction detection 225
- Outdoor unit inverter compressor abnormal 225
- Remote controller display 225
- Supposed causes 225
- Troubleshooting compressor inspection 225
- When an excessive current flows in the power transistor instantaneous overcurrent also causes activation 225
- Applicable models rx y 5 48m 226
- Compressor coil disconnected 226
- Compressor overload 226
- Defect of inverter pc board 226
- Malfunction decision conditions 226
- Malfunction is detected by current flowing in the power transistor 226
- Method of malfunction detection 226
- Outdoor unit inverter current abnormal 226
- Remote controller display 226
- Supposed causes 226
- Troubleshooting output current check 226
- When overload in the compressor is detected 226
- Applicable models rx y 5 48m 227
- Defect of compressor 227
- Defect of inverter pc board 227
- Malfunction decision conditions 227
- Malfunction is detected from current flowing in the power transistor 227
- Method of malfunction detection 227
- Outdoor unit inverter start up error 227
- Pressure differential start 227
- Remote controller display 227
- Supposed causes 227
- Troubleshooting 227
- When overload in the compressor is detected during startup 227
- Outdoor unit malfunction of transmission between inverter and control pc board 228
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 229
- Troubleshooting 229
- Troubleshooting by indication on the remote controller si38 304 229
- Applicable models rx y 5 48m 230
- Defect of inverter pc board 230
- Defect of k1m 230
- Defect of main circuit capacitor 230
- Imbalance in supply voltage is detected in pc board 230
- Improper main circuit wiring 230
- Malfunction decision conditions 230
- Malfunction is not decided while the unit operation is continued p1 will be displayed by pressing the inspection button 230
- Method of malfunction detection 230
- Open phase 230
- Outdoor unit inverter over ripple protection 230
- Remote controller display 230
- Supposed causes 230
- Troubleshooting 230
- Voltage imbalance between phases 230
- When the resistance value of thermistor becomes a value equivalent to open or short circuited status 230
- Outdoor unit malfunction of inverter radiating fin temperature rise sensor 231
- 1 refer to thermistor resistance temperature characteristics table on p321 2 refer to pressure sensor pressure voltage characteristics table on p323 232
- Applicable models rx y 5 48m 232
- Defect of outdoor unit pc board a1p 232
- Defect of pressure sensor 232
- Defect of thermistor r2t or r4t 232
- Low pressure drop due to refrigerant shortage or electronic expansion valve failure 232
- Malfunction decision conditions 232
- Malfunction is not decided while the unit operation is continued 232
- Method of malfunction detection 232
- Microcomputer judge and detect if the system is short of refrigerant 232
- Out of gas or refrigerant system clogging incorrect piping 232
- Remote controller display 232
- Short of gas malfunction is detected by discharge pipe temperature thermistor 232
- Supposed causes 232
- Troubleshooting 232
- Applicable models rx y 5 48m 233
- Defect of outdoor pc board a1p 233
- Detection is based on the voltage in main circuit capacitor for inverter and supply voltage the phase of each phase are detected by reverse phase detection circuit and right phase or reverse phase are judged 233
- Malfunction decision conditions 233
- Method of malfunction detection 233
- Power supply open phase 233
- Power supply reverse phase 233
- Remote controller display 233
- Reverse phase open phase 233
- Supposed causes 233
- Troubleshooting 233
- Power supply insufficient or instantaneous failure 234
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 235
- Troubleshooting 235
- Troubleshooting by indication on the remote controller si38 304 235
- Check operation not executed 236
- Malfunction of transmission between indoor units 237
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 238
- Si38 304 troubleshooting by indication on the remote controller 238
- Troubleshooting 238
- Troubleshooting 227 238
- Applicable models all models of indoor units 239
- Connection of two main remote controllers when using 2 remote controllers 239
- Defect of indoor unit pc board 239
- Defect of remote controller pc board 239
- In case of controlling with 2 remote controller check the system using microcomputer is signal transmission between indoor unit and remote controller main and sub is normal 239
- Malfunction decision conditions 239
- Malfunction of indoor unit remote controller transmission 239
- Malfunction of transmission between remote controller and indoor unit 239
- Malfunction of transmission caused by noise 239
- Method of malfunction detection 239
- Normal transmission does not continue for specified period 239
- Remote controller display 239
- Supposed causes 239
- Troubleshooting 239
- Malfunction of transmission between outdoor units 240
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 241
- Troubleshooting 241
- Troubleshooting by indication on the remote controller si38 304 241
- Applicable models all models of indoor units 242
- Connection between sub remote controllers 242
- Defect of remote controller pc board 242
- In case of controlling with 2 remote controller check the system using microcomputer if signal transmission between indoor unit and remote controller main and sub is normal 242
- Malfunction decision conditions 242
- Malfunction of transmission between main and sub remote controller 242
- Malfunction of transmission between master and slave remote controllers 242
- Method of malfunction detection 242
- Normal transmission does not continue for specified period 242
- Remote controller display 242
- Supposed causes 242
- Troubleshooting 242
- Malfunction of transmission between indoor and outdoor units in the same system 243
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 244
- Si38 304 troubleshooting by indication on the remote controller 244
- Troubleshooting 244
- Troubleshooting 233 244
- Applicable models all models of indoor unit rx y 5 48m 245
- Defect of outdoor unit pc board a1p 245
- Excess of connected indoor units 245
- Excessive number of indoor units 245
- Malfunction decision conditions 245
- Method of malfunction detection 245
- Mismatching of the refrigerant type of indoor and outdoor unit 245
- Remote controller display 245
- Setting of outdoor p c board was not conducted after replacing to spare parts p c board 245
- Supposed causes 245
- The number of indoor units that can be connected to a single outdoor unit system depends on the type of outdoor unit 245
- Troubleshooting 245
- Address duplication of central remote controller 246
- Malfunction of transmission between central remote controller and indoor unit 247
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 248
- Si38 304 troubleshooting by indication on the remote controller 248
- Troubleshooting 248
- Troubleshooting 237 248
- Applicable models all models of indoor units rx y 5 48m 249
- Defect of indoor unit pc board 249
- Failure to execute wiring check operation 249
- Improper connection of transmission wiring between outdoor unit and outdoor unit outside control adaptor 249
- Malfunction decision conditions 249
- Method of malfunction detection 249
- Note test operation may not be successful if carried out after the outdoor unit has been off for more than 12 hours or if it is not carried out after running all connected indoor units in the fan mode for at least an hour 249
- Refrigerant system not set incompatible wiring piping 249
- Remote controller display 249
- Supposed causes 249
- Troubleshooting 249
- Applicable models all models of indoor units rx y 5 48m 250
- Defect of indoor unit pc board 250
- Defect of outdoor unit pc board a1p 250
- Improper connection of transmission wiring between outdoor unit and outdoor unit outside control adaptor 250
- Malfunction decision conditions 250
- Malfunction of system refrigerant system address undefined 250
- Method of malfunction detection 250
- Remote controller display 250
- Supposed causes 250
- Troubleshooting 250
- Applicable models all models of indoor units rx y 5 48m 251
- Connector for setting master controller is disconnected 251
- Defect of indoor unit pc board 251
- Failure of pc board for central remote controller 251
- Malfunction decision conditions 251
- Malfunction of transmission between central remote controller and indoor unit 251
- Malfunction of transmission between optional controllers for centralized control and indoor unit 251
- Method of malfunction detection 251
- Microcomputer checks if transmission between indoor unit and central remote controller is normal 251
- Remote controller display 251
- Supposed causes 251
- Troubleshooting 251
- Troubleshooting op central remote controller 251
- When transmission is not carried out normally for a certain amount of time 251
- Pc board defect 252
- Applicable models centralized remote controller 253
- Defect of pc board of optional controllers for centralized control 253
- Malfunction decision conditions 253
- Malfunction of transmission between optional controllers for centralized control 253
- Method of malfunction detection 253
- Remote controller display 253
- Supposed causes 253
- Troubleshooting 253
- Improper combination of optional controllers for centralized control 254
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 255
- Troubleshooting 255
- Troubleshooting op central remote controller si38 304 255
- Address duplication improper setting 256
- Malfunction of transmission between central remote controller and indoor unit 257
- Troubleshooting op schedule timer 257
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 258
- Si38 304 troubleshooting op schedule timer 258
- Troubleshooting 258
- Troubleshooting 247 258
- Pc board defect 259
- Applicable models all models of indoor units schedule timer 260
- Defect of pc board of optional controllers for centralized control 260
- Malfunction decision conditions 260
- Malfunction of transmission between optional controllers for centralized control 260
- Method of malfunction detection 260
- Remote controller display 260
- Supposed causes 260
- Troubleshooting 260
- Improper combination of optional controllers for centralized control 261
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 262
- Si38 304 troubleshooting op schedule timer 262
- Troubleshooting 262
- Troubleshooting 251 262
- Address duplication improper setting 263
- Operation lamp blinks 264
- Troubleshooting op unified on off controller 264
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 265
- Troubleshooting 265
- Troubleshooting op unified on off controller si38 304 265
- Display under host computer integrate control blinks repeats single blink 266
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 267
- Troubleshooting 267
- Troubleshooting op unified on off controller si38 304 267
- Si38 304 troubleshooting op unified on off controller 268
- Troubleshooting 257 268
- Applicable models unified on off controller 269
- Central control address group no is not set for indoor unit 269
- Display under host computer integrate control blinks repeats double blink 269
- Improper address setting 269
- Improper wiring of transmission wiring 269
- Malfunction decision conditions 269
- Method of malfunction detection 269
- Remote controller display 269
- Supposed causes 269
- Troubleshooting 269
- Troubleshooting op unified on off controller si38 304 269
- Under host computer integrated control repeats double blink 269
- Check no 8 check on connector of fan motor power supply cable 1 turn off the power supply measure the resistance between phases of u v w at the motor side connectors three core wire to check that the values are balanced and there is no short circuiting while connector or relay connector is disconnected 270
- Check no 9 1 turn off the power supply 2 measure the resistance between vcc and each phase of u v w and gnd and each phase at the motor side connectors five core wire to check that the values are balanced within the range of 20 while connector or relay connector is disconnected 270
- Si38 304 troubleshooting op unified on off controller 270
- Troubleshooting 259 270
- Check no 12 check on pulse input of position signal of fan inverter pcb 1 disconnect the connector x2a while power supply off and operation off 2 is the voltage between pins no 4 and 5 on x2a approx 15 v after power supply is turned on 3 connect the connector x2a while power supply off and operation off 4 check below conditions when the fan motor is rotated one turn manually under the condition of operation off after power supply is turned on are the pulse approx 0 v and 5 v generated 4 times between no 1 and 5 on x2a are the pulse approx 0 v and 5 v generated 4 times between no 2 and 5 on x2a are the pulse approx 0 v and 5 v generated 4 times between no 3 and 5 on x2a 271
- Part 7 replacement procedure for inv compressor vrv ii rx y 5m to 48m 272
- Replacement procedure 273
- Replacement procedure for inv compressor vrv ii rx y 5m 48m 273
- List of electrical and functional parts 98 274
- Option list 11 274
- Part 8 appendix 274
- Part 8 part 8 part 8 part 8 appendix appendix appendix appendix 274
- Piping diagrams 64 274
- Piping installation point 14 274
- Selection of pipe size joints and header 16 274
- Thermistor resistance temperature characteristics 21 8 pressure sensor 23 9 method of replacing the inverter s power transistors and diode modules 24 274
- Wiring diagrams for reference 71 274
- Heat pump 275
- Outdoor unit 275
- Piping diagrams 275
- Rxy8m rxy10m rxy12m 276
- Rxy14m rxy16m 277
- Cooling only 278
- Rx8m rx10m rx12m 279
- Rx14m rx16m 280
- Electronic expansion valve filter filter 281
- Flare connectio 281
- Flare connection 281
- Fxc fxf fxk fxyd fxs fxyb fxm fxh fxa fxl fxn 281
- Heat exchanger gas piping connection port 281
- Indoor unit 281
- Liquid piping connection port 281
- R1t thermistor for suction air temperature r2t thermistor for liquid line temperature r3t thermistor for gas line temperature 281
- Φ 19 or less attached piping above φ 25 281
- Heat pump 282
- Outdoor unit 282
- Rxy5my1 rxy5myl 282
- Wiring diagrams for reference 282
- Rxy8my1 rxy8myl rxy10my1 rxy10myl rxy12my1 rxy12myl 283
- Rxy14my1 rxy14myl rxy16my1 rxy16myl 284
- Rxy5mtl 285
- Rxy8mtl rxy10mtl rxy12mtl 286
- Rxy14mtl rxy16mtl 287
- Cooling only 288
- Rx5my1 288
- Rx8my1 rx10my1 rx12my1 289
- Rx14my1 rx16my1 290
- 50hz 60hz 291
- Field wiring 291
- Rx y 5 8 10 12 14 16my1 rx y 5 8 10 12 14 16myl 291
- Rx y 18 20 22 24 26 28 32my1 rx y 18 20 22 24 26 28 32myl 292
- Rx y 34 36 38 40 42 44 46 48my1 rx y 34 36 38 40 42 44 46 48myl 293
- Rxy5 8 10 12 14 16mtl 294
- Rxy18 20 22 24 26 28 30 32mtl 295
- Rxy34 36 38 40 42 44 46 48mtl 296
- Fxc 20l 25l 32l 63lve 297
- Indoor unit 297
- Fxc 40l 50l 80l 125lve 298
- Fxf25l 32l 40l 50l 63l 80l 100l 125lve 299
- Fxk 25l 32l 40l 63lve 300
- Fxyd20kave 25kave 32kave 40kave 50kave 63kave 301
- Fxs 20l 25l 32l 40l 50l 63l 80l 100l 125lve 302
- Fxyb20k 25k 32k 40k 50k 63k 80k 100k 125kv1 303
- Fxm 40l 50l 63l 80l 100l 125lve 304
- Fxm 200l 250lve 305
- Fxh 32l 63l 100lve 306
- Fxa20l 25l 32l 40l 50l 63lve 307
- Fxl 20l 25l 32l 40l 50l 63lve fxn 20l 25l 32l 40l 50l 63lve 308
- List of electrical and functional parts 309
- Outdoor unit 309
- Rxy5 16my1 309
- Rxy5 16myl 311
- Rxy5 16mtl 313
- Rx5 16my1 315
- Appendix 317
- C off 87 c on 317
- Indoor side 317
- Indoor unit 317
- List of electrical and functional parts si38 304 317
- Appendix 307 318
- Si38 304 list of electrical and functional parts 318
- Appendix 319
- List of electrical and functional parts si38 304 319
- Appendix 309 320
- Si38 304 list of electrical and functional parts 320
- Μ f 400v 320
- Appendix 321
- List of electrical and functional parts si38 304 321
- Appendix 311 322
- Note 1 installation box no is necessary for each adaptor marked h 2 up to 2 adaptors can be fixed for each installation box 3 only one installation box can be installed for each indoor unit 4 installation box no 8 is necessary for second adaptor 322
- Note installation box for h adaptor must be procured on site 322
- Operation control system optional accessories 322
- Option list 322
- Option list of controllers 322
- Si38 304 option list 322
- System configuration 322
- Various pc boards 322
- Appendix 323
- Building management system 323
- Is a registered trade mark of echelon corporation 323
- Option list si38 304 323
- Appendix 313 324
- Option lists outdoor unit 324
- Rxy18 32my1 yl tl e rx18 32my1 e 324
- Rxy34 48my1 yl tl e rx34 48my1 e 324
- Rxy5 16my1 yl tl e rx5 10my1 e 324
- Si38 304 option list 324
- In the case of 2m or less 325
- In the case of 2m or more 325
- Piping installation point 325
- Since there is a possibility that oil may be collected on a stop machine side install piping between outdoor units to go to level or go up to an outdoor unit and to make a slope 325
- The projection part between multi connection piping kits 325
- When the piping length between the multi connection kits or between multi connection kit and outdoor unit is 2m or more prepare a vertical projection part 200mm or more as shown below only on the gas pipe line location less than 2m from multi connection kit 325
- The example of a wrong pattern 326
- Between outdoor unit and uppermost stream refnet joint 327
- For refnet joints other than the first branch select the proper ones based on the total capacity index of the indoor units installed after the first branch using the following table 327
- How to select pipe size 327
- How to select the refnet header 327
- How to select the refnet joint 327
- How to select the refnet joint select the refnet joint from the following table when using refnet joints at the first branch counted from the outdoor unit side ex refnet joint a 327
- Piping material select the piping material to be used from the next table according to piping size 327
- Rxy5my1 rxy8my1 rxy10my1 rxy12my1 rxy14my1 rxy16my1 327
- Select the proper refnet header using the following table based on the total capacity index of indoor units installed after the header 327
- Selection of pipe size joints and header 327
- Pipe size for direct connection to indoor unit must be the same as the connection size of indoor unit connection pipe size of indoor unit 328
- Piping between the refnet joints 328
- Piping between the refnet joints and indoor unit 328
- Select the proper pipe size using the following table based on the total capacity index of indoor units connected downstream connection piping size should not exceed the refrigerant piping size selected by the model with combination units 328
- Select the wall thickness in accordance with revelant local and national regulations 328
- The piping minimum thickness 328
- For refnet joints other than the first branch select the proper ones based on the total capacity index of the indoor units installed after the first branch using the following table 329
- How to select pipe size 329
- How to select the refnet joint 329
- How to select the refnet joint select the refnet joint from the following table when using refnet joints at the first branch counted from the outdoor unit side 329
- Main piping between multi connection piping kit and refnet joint select the proper ones based on the following table 329
- Piping material select the piping material to be used from the next table according to piping size 329
- Rxy18my1 rxy20my1 rxy22my1 rxy24my1 rxy26my1 rxy28my1 rxy30my1 rxy32my1 rxy34my1 rxy36my1 rxy38my1 rxy40my1 rxy42my1 rxy44my1 rxy46my1 rxy48my1 329
- Branching is impossible between refnet header and indoor unit for systems with a total capacity of 640 and over connect a refnet joint branch 330
- How to select the refnet header 330
- Outdoor unit multi connection piping kit 330
- Pipe size for direct connection to indoor unit must be the same as the connection size of indoor unit connection pipe size of indoor unit 330
- Piping between the multi connection piping kit 330
- Piping between the refnet joints 330
- Piping between the refnet joints and indoor unit 330
- Select the piping kit according to the no of outdoor units 330
- Select the proper branch kit model based on the total capacity index of indoor units installed after the header using the following table 330
- Select the proper pipe size using the following table based on the total capacity index of indoor units connected downstream connection piping size should be larger than main piping size connection piping size should not exceed the refrigerant piping size selected by the model with combination units 330
- Select the proper pipe size using the following table based on the total capacity index of outdoor units connected upper stream 330
- Pipe size for direct connection to outdoor unit must be the same as the connection size of outdoor unit 331
- Piping between outdoor unit and multi connection piping kit 331
- Select the wall thickness in accordance with revelant local and national regulations 331
- The piping minimum thickness 331
- Appendix 321 332
- Indoor unit for air suction r1t for liquid pipe r2t for gas pipe r3t 332
- Outdoor unit for outdoor air r1t for coil r2t for suction pipe r4t for receiver gas pipe r5t for oil r7t 332
- Si38 304 thermistor resistance temperature characteristics 332
- Thermistor resistance temperature characteristics 332
- Appendix 333
- Outdoor unit thermistors for discharge pipe r3t 333
- Thermistor resistance temperature characteristics si38 304 333
- Pressure sensor 334
- Before checking disconnect the electric wiring connected to the power transistor and diode module 335
- Decision according to continuity check by analog tester 335
- Electronic circuit 335
- Inverter p c board 335
- Inverter pc board aip 335
- Method of replacing the inverter s power transistors and diode modules 335
- Index index index index 338
- Drawings flow charts 342
- Drawings flow charts drawings flow charts drawings flow charts drawings flow charts 342
- L for further improvement specifications or designs are subject to change without prior notice 346
- Printed in singapore 08 2003 ak 346
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