Countermeasures For Error During Test Run - Mitsubishi PUMY-P60NKMU Technical & Service Manual

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.
Check
code
0403 Serial communication error
1102 Compressor temperature
1300 Low pressure
1302 High pressure
1500 Superheat due to low discharge temperature
Insuffi cient refrigerant trouble
1501
Blocked valve in cooling mode
1508 4-way valve trouble in heating mode
2500 Water leakage
2502 Drain pump trouble
2503 Drain sensor trouble (THd)
4100 Compressor current interruption( locked compressor)
4210 Compressor over current interruption
Voltage shortage/overvoltage/PAM error/T-open phase/power syncronization
4220
signal error
4230 Heatsink temperature
4250 Power module
4400 Rotational frequency of outdoor fan motor
Air inlet sensor trouble (TH21) or
5101
Compressor temperature thermistor (TH4) open/short
Liquid pipe temp.sensor trouble (TH22) or
5102
Low pressure saturated temp.thermistor (TH6) open/short
5103 Gas pipe temperature sensor trouble (TH23)
5105 Piping temperature thermistor (TH3) open/short
5106 Piping temperature thermistor (TH7) open/short
5109 HIC piping temperature thermistor (TH2) open/short
5110 Heatsink temperature sensor thermistor (TH8) open/short
5201 High pressure sensor (63HS)
5202 Low pressure sensor (63LS)
5300 Primary current
5701 Contact failure of drain fl owt switch
6600 Duplex address error
6602 Transmission processor hardware error
6603 Transmission bus BUSY error
6606 Signal comminication error with transmission processor
6607 No ACK error
6608 No responce frame error
6831 MA communication receive signal error (no receive signal)
6832 MA commnication send signal error (starting bit derection error)
6833 MA commnication send error (H/W error)
6834 MA commnication receive error (Synchronous recovery error)
7100 Total capacity error
7101 Capacity code error
7102 Connecting excessive number of units
Address setting error
7105
Remote controller sensor trouble
7111
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.
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.
Bit 1 2
Compressor
Indication 52C
operated
OCH502C
Trouble
3 4 5
21S4 SV1 (SV2)
Detected Unit
Remote
Indoor Outdoor
Controller
Outdoor unit Multi controller board ~
Power board communiation trouble
Check delay code 1202
Check delay code 1402
Check delay code 1600
Check delay code 1601
Check delay code 1501
Check delay code 1608
Check delay code 4350
Check delay code 4320
Check delay code 4330
Check delay code 4350
Check delay code 4500
Check delay code 1202
Check delay code 1211
Check delay code 1205
Check delay code 1221
Check delay code 1222
Check delay code 1214
Check delay code 1402
Check delay code 1400
Check delay code 4310
Only M-NET Remote controller is detected.
Only M-NET Remote controller is detected.
Only M-NET Remote controller is detected.
Only M-NET Remote controller is detected.
Only M-NET Remote controller is detected. *
Only M-NET Remote controller is detected. *
Only MA Remote controller is detected.
Only MA Remote controller is detected.
Only MA Remote controller is detected.
Only MA Remote controller is detected.
6 7 8
— — Always lit
32
Remarks
[Example]
When the compressor and
SV1 are turned during cooling
operation.
1 2 3 4 5 6 7 8