Mitsubishi Electric PUMY-P112VKM3 Technical & Service Manual page 52

8-1-2. 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 Check
code code
(2 digits) (4 digits)
Ed 0403 Serial communication error
U2 1102 Compressor temperature trouble
UE 1302 High pressure trouble
U7 1500 Superheat due to low discharge temperature trouble
Refrigerant shortage trouble
U2 1501
Closed valve in cooling mode
P6 1503 Indoor HEX freezing protection
EF 1508 4-way valve trouble in heating mode
L6 2135 Circulation water freeze protection
PA 2500 Water leakage
P5 2502 Drain over flow protection
P4 2503 Drain sensor abnormality
UF 4100 Compressor current interruption (locked compressor)
Pb 4114 Fan trouble (Indoor unit)
UP 4210 Compressor overcurrent interruption
Voltage shortage/overvoltage/PAM error/L1open phase/primary
U9 4220
current sensor error/power synchronization signal error
U5 4230 Heat sink temperature trouble
U6 4250 Power module trouble
U8 4400 Fan trouble (Outdoor unit)
Air inlet thermistor (TH21) open/short or
U3 5101
Compressor temperature thermistor (TH4) open/short
Liquid pipe temperature thermistor (TH22) open/short
U4 5102
Suction pipe temperature thermistor (TH6) open/short
U4 5103 Gas pipe temperature thermistor (TH23) open/short
U4 5105 Outdoor liquid pipe temperature thermistor (TH3) open/short
U4 5106 Ambient temperature thermistor (TH7) open/short
U4 5109 HIC pipe temperature thermistor (TH2) open/short
U4 5110 Heat sink temperature thermistor (TH8) open/short
F5 5201 High pressure sensor (63HS) trouble
F3 5202 Low pressure sensor (63LS) trouble
UH 5300 Primary current error
P4 5701 Contact failure of drain float switch
A0 6600 Duplex address error
A2 6602 Transmission processor hardware error
A3 6603 Transmission bus BUSY error
A6 6606 Signal communication error with transmission processor
A7 6607 No ACK error
A8 6608 No response frame error
E0/E4 6831 MA communication receive error
E3/E5 6832 MA communication send error
E3/E5 6833 MA communication send error
E0/E4 6834 MA communication receive error
EF 7100 Total capacity error
EF 7101 Capacity code error
EF 7102 Connecting excessive number of units and branch boxes
Address setting error
EF 7105
Incompatible unit combination
EF 7130
Notes:
1. 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.
2. The check codes displayed on the units may be different between the error source and others. In that case, please refer to the check
code of error source by displayed attribute and address.
3. Refer to the service manual of indoor unit or remote controller for the detail of error detected in indoor unit or remote controller.
• 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
OCH632A
Trouble
3 4 5
21S4 SV1 (SV2)
Detected Unit
Remote
Indoor Outdoor
Controller
6 7 8
— — Always lit
52
Remarks
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.
[Example]
When the compressor and
SV1 are turned during cooling
operation.
1 2 3 4 5 6 7 8