32
8-1-3. Countermeasures for Error During Test Run
• If a problem occurs during test run, a code number will appear in the temperature display area on the remote controller (or
LED on the outdoor unit), and the air conditioning system will automatically cease operating.
Determine the nature of the abnormality and apply corrective measures.
Note that this document describes flow charts for solving trouble/error(s) which is detected in outdoor unit only.
12345678
[Example]
When the compressor and
SV1 are turned during cooling
operation.
Bit
Indication
1
Compressor
operated
2
52C
3
21S4
4
SV1
5
(SV2)
6
—
7
—
8
Always lit
Self-diagnosis function
The indoor and outdoor units can be diagnosed automatically using the self-diagnosis switch
(SW1) and LED1, LED2 (LED indication) found on the multi-controller of the outdoor unit.
LED indication : Set all contacts of SW1 to OFF.
During normal operation
The LED indicates the drive state of the controller in the outdoor unit.
Note:
When the outdoor unit detects No ACK error/No response error, an object indoor unit is treated as a stop, and not assumed to be abnormal.
Check
code
Trouble
Detected Unit
Remarks
Indoor Outdoor
Remote
Controller
0403 Serial communication error
Outdoor unit Multi controller board ~
Power board communiation trouble
1102 Compressor temperature
Check delay code 1202
1300 Low pressure
1302 High pressure Check delay code 1402
1500 Superheat due to low discharge temperature
Check delay code 1600
1501
Insuffi cient refrigerant trouble Check delay code 1601
Blocked valve in cooling mode
Check delay code 1501
1508 4-way valve trouble in heating mode Check delay code 1608
2500 Water leakage
2502 Drain pump trouble
2503 Drain sensor trouble (THd)
4100 Compressor current interruption( locked compressor) Check delay code 4350
4210 Compressor over current interruption
4220
Voltage shortage/overvoltage/PAM error/T-open phase/power syncronization
signal error
Check delay code 4320
4230 Heatsink temperature
Check delay code 4330
4250 Power module
Check delay code 4350
4400 Rotational frequency of outdoor fan motor Check delay code 4500
5101
Air inlet sensor trouble (TH21) or
Compressor temperature thermistor (TH4) open/short
Check delay code 1202
5102
Liquid pipe temp.sensor trouble (TH22) or
Low pressure saturated temp.thermistor (TH6) open/short
Check delay code 1211
5103 Gas pipe temperature sensor trouble (TH23)
5105 Piping temperature thermistor (TH3) open/short Check delay code 1205
5106 Piping temperature thermistor (TH7) open/short
Check delay code 1221
5109 HIC piping temperature thermistor (TH2) open/short Check delay code 1222
5110 Heatsink temperature sensor thermistor (TH8) open/short Check delay code 1214
5201 High pressure sensor (63HS)
Check delay code 1402
5202 Low pressure sensor (63LS) Check delay code 1400
5300 Primary current Check delay code 4310
5701 Contact failure of drain fl owt switch
6600 Duplex address error Only M-NET Remote controller is detected.
6602 Transmission processor hardware error Only M-NET Remote controller is detected.
6603 Transmission bus BUSY error
Only M-NET Remote controller is detected.
6606 Signal comminication error with transmission processor Only M-NET Remote controller is detected.
6607 No ACK error
Only M-NET Remote controller is detected. *
6608 No responce frame error Only M-NET Remote controller is detected. *
6831 MA communication receive signal error (no receive signal)
Only MA Remote controller is detected.
6832
MA commnication send signal error (starting bit derection error)
Only MA Remote controller is detected.
6833 MA commnication send error (H/W error) Only MA Remote controller is detected.
6834 MA commnication receive error (Synchronous recovery error) Only MA Remote controller is detected.
7100 Total capacity error
7101 Capacity code error
7102 Connecting excessive number of units
7105
Address setting error
7111
Remote controller sensor trouble
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