McQuay MWM Service Manual page 46

MCQUAY Service Guide Book
Wall Mounted J Series
Model
MWM 09/15J/JR
SLEEP POWER
(Red) (Green/Red)
/
Green
/
Red
/
Red
/
Green
1 time
2 times
3 times
Red
4 times
5 times
ON
Note: The unit will not detect sensor missing when the compressor is ON.
Board Handset
L2GSN
TIMER
Error
Code
(Orange)
-
-
-
-
-
-
-
-
E1
E2
E3
E4
1 time
-
E5
3 times
E8
6 times
E9
EE
ON/ OFF
/
G17
Operation / Faulty
Indication
Cooling mode
Heating mode
Auto mode in heating
operation
Auto mode in cooling
operation
Timer On
Sleep mode On
Fan mode On
Dry mode On
Room air sensor contact
loose / short
Indoor coil sensor
contact open
Outdoor coil sensor
contact open
Compressor overload /
Indoor coil sensor short /
Outdoor coil sensor
short
Defrost operation
Gas leak
Hardware error (tact
switch pin short)
No Feedback from
indoor fan
EEPROM defrost
Blinking
45
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
Check indoor fan motor / fan
motor wiring
-
Diagnosis