Countermeasures For Error During Test Run - Mitsubishi Electric PUMY-P112VKM1 Service Manual

8-1-3. Countermeasures for Error During Test Run

• If a problem occurs during test run, a code number will appear 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.
Check
code
0403 Serial communication error
1102 Compressor temperature
1300 Low pressure
1302 High pressure
1500 Superheat due to low discharge temperature
Refrigerant shortage
1501
Blocked valve in cooling mode
1508 4-way valve trouble in heating mode
2500 Water leakage
Drain over flow protection
2502
2503 Drain sensor abnormality
4100 Compressor current interruption (locked compressor)
4210 Compressor overcurrent interruption
Undervoltage/overvoltage/PAM error/L1open phase/power
4220
synchronization signal error
4230 Heat sink temperature
4250 Power module
4400 Rotational frequency of outdoor fan motor
Air inlet thermistor trouble (TH21) or
5101
Compressor temperature thermistor (TH4) open/short
Liquid pipe temperature thermistor trouble (TH22)
5102
Suction pipe temperature thermistor (TH6) open/short
5103 Gas pipe temperature thermistor trouble (TH23)
5105 Outdoor liquid pipe temperature thermistor (TH3) open/short
5106 Ambient thermistor (TH7) open/short
5109 HIC pipe temperature thermistor (TH2) open/short
5110 Heat sink temperature thermistor (TH8) open/short
5201 High pressure sensor (63HS)
5202 Low pressure sensor (63LS)
5300 Primary current
Contact failure of drain float switch
5701
6600 Duplex address error
6602 Transmission processor hardware error
6603 Transmission bus BUSY error
6606 Signal communication error with transmission processor
6607 No ACK error
6608 No response frame error
6831 MA communication receive error (no receive signal)
6832 MA communication send error
6833 MA communication send error
6834 MA communication receive error
7100 Total capacity error
7101 Capacity code error
7102 Connecting excessive number of units
Address setting error
7105
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.
*Abnormality for PWFY series
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
OCH576
Trouble
3 4 5
21S4 SV1 (SV2)
Detected Unit
Remote
Indoor Outdoor
Controller
Outdoor unit outdoor multi controller circuit board –
Power circuit board communication 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
46
Remarks
[Example]
When the compressor and
SV1 are turned during cooling
operation.
1 2 3 4 5 6 7 8