Mitsubishi Electric PUMY-P100VHM Technical & Service Manual page 33

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.
Check code
Serial transmission trouble
0403
Discharge temperature trouble
1102
Low Pressure trouble
1300
High pressure trouble
1302
Excessive refrigerant replenishment
1500
Insufficient refrigerant trouble
1501
Vacuum operation protection
1505
Drain pump trouble
2502
Drain sensor trouble (THd)
2503
4100 Overcurrent trouble (Overload, compressor lock)
Power synchronization signal trouble
4115
Fan controller trouble (Indoor unit)
4116
Inverter trouble
4220
4230 Overheat protection of radiator panel
4250 Power module trouble or Overcurrent trouble
4400 Fan controller trouble (Outdoor)
Air inlet sensor trouble (TH21) or
5101
Discharge temperature sensor trouble (TH4)
Liquid pipe temp.sensor trouble (TH22) or
5102
Low pressure saturated temp.sensor trouble (TH6)
5103 Gas pipe temperature sensor trouble (TH23)
Piping temperature sensor trouble (TH3)
5105
Outdoor temperature sensor trouble (TH7)
5106
Radiator panel temperature sensor trouble (TH8)
5110
Pressure sensor trouble (63HS)
5201
Current sensor trouble
5300
Duplicated unit address setting
6600
Transmission error
6602
(Transmission processor hardware error)
6603
Transmission error (Transmission route BUSY)
Transmission and reception error
6606
(Communication trouble with transmission processor)
6607 Transmission and reception error (No ACK error)
Transmission and reception error
6608
(No responsive frame error)
MA communication receive signal error
6831
(no receive signal)
MA communication send signal error
6832
(starting bit derection error)
6833 MA communication send error (H/W error)
MA communication receive error
6834
(Synchronous recovery error)
Total capacity error
7100
Capacity code error
7101
7102 Connecting unit number error
7105 Address set error
Remote controller sensor trouble
7111
NOTE )
When the outdoor unit detects No ACK error/ No responsive frame 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
Trouble
3 4 5
21S4 SV1 (SV2)
Detected unit
Indoor Outdoor Remote
controller
Outdoor unit Multi controller board ~
Power board communication trouble
Check delay code 1202
Check delay code 1400
Check delay code 1402
Check delay code 1600
Check delay code 1601
Check delay code 4350
Check delay code 4165
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 1214
Check delay code 1402
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. w
Only M-NET Remote controller is detected. w
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
— — Always lit
33
Remarks
[Example]
When the compressor and
SV1 are turned during cooling
operation.
1 2 3 4 5 6 7 8
8