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