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Table of contents
1 Troubleshooting
1.1
To display the error code on the user interface.........................
1.2
To reset the error code via remote controller ............................
1.3
To reset the error code via outdoor unit ....................................
1.4
To perform a test run.................................................................
1.4.1
To perform a test run using the user interface ............
1.5
Error based troubleshooting ......................................................
1.5.1
A1-00 - PCB abnormality ...........................................
1.5.2
control .........................................................................
1.5.3
A6-00 - Indoor unit fan motor abnormality..................
1.5.4
AH-00 - Streamer unit abnormality.............................
1.5.5
abnormality .................................................................
1.5.6
C9-00 - Room thermistor abnormality ........................
1.5.7
CC-00 - Humidity sensor abnormality ........................
1.5.8
1.5.9
E1-00 - PCB defect ....................................................
1.5.10
E3-00 - High pressure switch abnormality .................
1.5.11
1.5.12
E6-00 - Compressor startup defect ............................
1.5.13
E7-00 - Fan lock abnormality .....................................
1.5.14
E8-00 - Input overvoltage abnormality .......................
1.5.15
EA-00 - Cooling/Heating switch abnormality..............
1.5.16
abnormality .................................................................
1.5.17
F6-00 - Stop due to cooling high pressure .................
1.5.18
internal temperature abnormality ................................
1.5.19
H0-00 - Current sensor abnormality...........................
1.5.20
H3-00 - High pressure switch defect .......................... 10
1.5.21
H6-00 - Location detection sensor abnormality.......... 10
1.5.22
H8-00 - Compressor input abnormality ...................... 10
1.5.23
H9-00 - Outdoor air thermistor abnormality................ 11
1.5.24
abnormality ................................................................. 11
1.5.25
abnormality ................................................................. 11
1.5.26
abnormality ................................................................. 11
1.5.27
L4-00 - Fin temperature increase abnormality ........... 11
1.5.28
L5-00 - Output over current abnormality .................... 12
1.5.29
P4-00 - Fin thermistor abnormality............................. 12
1.5.30
U0-00 - Shortage of refrigerant .................................. 12
1.5.31
U2-00 - Main circuit voltage abnormality.................... 13
1.5.32
1.5.33
unit and remote controller ........................................... 13
1.5.34
1.6
Symptom based troubleshooting............................................... 15
1.6.1
Operation does not start ............................................. 15
1.6.2
Operation sometimes stops ........................................ 15
1.6.3
Operation starts but the unit does not cool/heat ......... 15
1.6.4
Operating noise and vibrations ................................... 15
1.6.5
Abnormal high pressure.............................................. 16
1.6.6
Abnormal low pressure ............................................... 16
1.6.7
not operate.................................................................. 17
1.6.8
Operation starts and the unit stops immediately......... 17
1.6.9
Operation stops, unit cannot start for a while.............. 17
1.6.10
Unit discharges white mist .......................................... 17
1.6.11
Swing flap does not operate ....................................... 17
2.1
4-way valve ............................................................................... 18
2.1.1
Checking procedures .................................................. 18
RXA20~35A2V1B
Split Stylish R32
ESIE18-03 - 2018.09
2.1.2
Repair procedures ....................................................... 19
2.2
Compressor................................................................................ 20
2.2.1
Checking procedures ................................................... 20
2.2.2
Repair procedures ....................................................... 22
2.3
Expansion valve ......................................................................... 23
4
2.3.1
Checking procedures ................................................... 23
4
2.3.2
Repair procedures ....................................................... 24
4
2.4
Front panel motor ....................................................................... 26
4
2.4.1
Checking procedures ................................................... 26
4
2.4.2
Repair procedures ....................................................... 26
4
2.5
High pressure switch .................................................................. 27
4
2.5.1
Checking procedures ................................................... 27
4
2.5.2
Repair procedures ....................................................... 27
2.6
Humidity sensor.......................................................................... 28
5
2.6.1
Checking procedures ................................................... 28
5
2.6.2
Repair procedures ....................................................... 28
5
2.7
Indoor unit fan motor .................................................................. 29
2.7.1
Checking procedures ................................................... 29
5
2.7.2
Repair procedures ....................................................... 29
5
2.8
Indoor unit PCB .......................................................................... 30
6
2.8.1
Checking procedures ................................................... 30
6
2.8.2
Repair procedures ....................................................... 31
6
2.9
Intelligent thermal sensor ........................................................... 33
6
2.9.1
Checking procedures ................................................... 33
7
2.9.2
Repair procedures ....................................................... 33
7
2.10
Inverter PCB............................................................................... 34
8
2.10.1
Checking procedures ................................................... 34
8
2.10.2
Repair procedures ....................................................... 35
8
2.11
Main PCB ................................................................................... 35
2.11.1
Checking procedures ................................................... 35
8
2.11.2
Repair procedures ....................................................... 36
9
2.12
Outdoor unit fan motor ............................................................... 38
2.12.1
Checking procedures ................................................... 38
9
2.12.2
Repair procedures ....................................................... 39
9
2.13
Plate work................................................................................... 40
2.13.1
Outdoor unit ................................................................. 40
2.13.2
Indoor unit .................................................................... 42
2.14
Reactor....................................................................................... 44
2.14.1
Checking procedures ................................................... 44
2.14.2
Repair procedures ....................................................... 45
2.15
Streamer unit.............................................................................. 45
2.15.1
Checking procedures ................................................... 45
2.15.2
Repair procedures ....................................................... 45
2.16
Swing flap motor......................................................................... 46
2.16.1
Main swing flap motor .................................................. 46
2.16.2
Secondary swing flap motor......................................... 47
2.17
Swing raster motor ..................................................................... 48
2.17.1
Checking procedures ................................................... 48
2.17.2
Repair procedures ....................................................... 49
2.18
Thermistors ................................................................................ 49
2.18.1
Refrigerant thermistors ................................................ 49
2.18.2
Other thermistors ......................................................... 51
2.19
Wifi control PCB ......................................................................... 51
2.19.1
Checking procedures ................................................... 51
2.19.2
Repair procedures ....................................................... 51
3.1
Power supply.............................................................................. 52
3.1.1
Checking procedures ................................................... 52
3.1.2
Repair procedures ....................................................... 52
3.2
Refrigerant circuit ....................................................................... 53
3.2.1
Checking procedures ................................................... 53
3.2.2
Repair procedures ....................................................... 54
3.3
External factors .......................................................................... 55
3.3.1
Checking procedures ................................................... 55
3.3.2
Repair procedures ....................................................... 55
18
4.1
To clean the outdoor unit heat exchanger.................................. 56
4.2
To clean the indoor unit heat exchanger .................................... 56
Table of contents
52
56
Service manual
3
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