McQuay M4MC User Manual

MCQUAY Service Guide Book Diagnosis
55
Wall Mounted G Series Inverter-X Model
Model Board Handset
MWMX 10/15/20/25G/GR VA2.0 G17 / SLM3
SLEEP
(Red)
POWER
(Green/Red)
TIMER
(Orange)
IONIZER
(Green)
Error
Code
(SLM3)
Operation / Faulty
Indication
Action
- Cooling mode -
-
Heating mode / Standby
mode (only for heat
pump model)
-
- Auto mode in operation -
- Timer On -
- Sleep mode On -
- Ionizer On -
- Fan mode On -
- Dry mode On -
- Defrost mode -
E1
Indoor temperature
sensor loose / short
Check indoor coil sensor
connection / change
indoor coil sensor
-
Coil temperature sensor
loose / short
Check coil sensor
connection / change coil
sensor
E2
Outdoor temperature
sensor loose / short
Check outdoor coil
sensor connection /
change outdoor coil
sensor
E3
Communication error
between indoor and
outdoor
Check the connection
wires between indoor
and outdoor
E4
Compressor overload
protection
If running ampere highly
increase, change the
compressor
E6
Compressor overheat /
gas leak
Check for leakage &
repair / Top up
refrigerant
E7 IPM / PFC error
Check supply voltage
and compressor phase
E8
Outdoor total current trip
/ DC peak
Check the input current
and discharge pressure
E9
Indoor fan feedback
error
Check indoor fan motor /
fan motor wiring
/
ON ON or OFF BLINKING
/
/
/
/
/
/
/
/
Red
Green
Green
Green
Green

McQuay M4MC Specifications

General

Brand	McQuay
Model	M4MC
Category	Air Conditioner
Language	English