80
M5MSY-2010 Troubleshooting
ERROR
CODE
ERROR DESCRIPTION
LC
COMMUNICATION ERROR (OUTDOOR CONTROL PCB AND INVERTER PCB)
P1
OPEN PHASE OR VOLTAGE UNBALANCE
P4
HEAT SINK THERMISTOR SHORT/OPEN
PJ
CAPACITY SETTING ERROR
U0
INSUFFICIENT GAS
U2
DC VOLTAGE OUT OF RANGE
U4
COMMUNICATION ERROR
U7
COMMUNICATION ERROR (OUTDOOR CONTROL PCB AND IPM PCB)
UA
INSTALLATION ERROR
UF
PIPING & WIRING INSTALLATION MISMATCH/WRONG WIRING/INSUFFICIENT GAS
UH
ANTIFREEZE (OTHER ROOMS)
Outdoor LED error indication
The outdoor unit LED indicates the running condition of the system:
LED INDICATION
DescriptionGreen Red
A1234
NORMAL
INSTALLATION ERROR
ANTIFREEZE (OTHER ROOMS)
HEAT SINK OVERHEAT
IPM ERROR/IGBT ERROR
INSUFFICIENT GAS
AC INPUT OVER CURRENT
COMPRESSOR START-UP ERROR
COMMUNICATION ERROR (OUTDOOR CONTROL PCB
AND IPM PCB)
4 WAY VALVE ERROR
DC VOLTAGE OUT OF RANGE
COMPRESSOR MOTOR LOCK/COMPRESSOR OVER-
LOADED
DISCHARGE PIPE OVERHEAT
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