McQuay MMC User Manual

MCQUAY Service Guide Book Diagnosis
44
Wall Mounted G Series
Model Board Handset
MWM 10/15/20/25G/GR L2.2 G17 / SLM3 / Netware 3 / SLM8
SLEEP
(Red)
POWER
(Green/Red)
TIMER
(Orange)
IONIZER
(Green)
Error
Code
(SLM3 /
Netware 3)
Operation / Faulty
Indication
Action
- Cooling mode -
- Heating mode -
-
Auto mode in
heating operation
-
-
Auto mode in
cooling operation
-
- Timer On -
- Sleep mode On -
- Ionizer On -
- Fan mode On -
- Dry mode On -
E1
Room air sensor
contact loose /
short
Check room sensor
connection / change room
sensor
E2
Indoor coil sensor
contact open
Check indoor coil sensor
connection / change indoor
coil sensor
E3
Outdoor coil sensor
contact open
Check outdoor coil sensor
connection / change
outdoor coil sensor
E4
Compressor
overload protection
/ Indoor / Outdoor
coil sensor short
If running ampere highly
increase, change the
compressor. If not, replace
the coil sensor
- Defrost mode -
E5 Gas leak
Check for leakage & repair
/ Top up refrigerant
E8
Hardware error
(tact switch pin
short)
Check for the tact switch
pin condition
/
ON ON or OFF BLINKING
/
/
/
/
/
/
/
/
/
/
Green
Red
Red
Green
1 time
3 times
1 time
Red
3 times
6 times
2 times

McQuay MMC Specifications

General

Brand	McQuay
Model	MMC
Category	Air Conditioner
Language	English