McQuay M5MSY18BR User Manual

48
M5MSY_(i) Troubleshooting
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
ANTIFREEZE (COOLING)/HEAT EXCHANGER OVER-
HEAT (HEATING)
HEAT EXCHANGER OVERHEAT
COMPRESSOR SENSOR SYSTEM ERROR
COMPRESSOR FEEDBACK DETECTION ERROR
AC CURRENT SENSOR ERROR
OUTDOOR AIR THERMISTOR SHORT/OPEN
COMPRESSOR DISCHARGE PIPE THERMISTOR
SHORT/OPEN/MISPLACED
COMPRESSOR DISCHARGE PIPE THERMISTOR
SHORT/OPEN/MISPLACED
LIQUID PIPE THERMISTOR SHORT/OPEN
GAS PIPE THERMISTOR SHORT/OPEN
HEAT SINK THERMISTOR SHORT/OPEN
OUTDOOR CONTROL BOX OVERHEAT
OUTDOOR PCB ERROR
OUTDOOR DC FAN MOTOR LOCK
Legend
Blinks
Off
On
If faulty condition occurs, please contact the nearest local dealer or qualifi ed service personnel. Do not attempt
to troubleshoot the unit yourself. For any enquiries on spare parts please contact your authorized dealer.

McQuay M5MSY18BR Specifications

General

Brand	McQuay
Model	M5MSY18BR
Category	Air Conditioner
Language	English