McQuay MWM Service Manual page 52

MCQUAY Service Guide Book
Water Source Split Unit – Wall Mounted G Series
Model
Model
M5WMWS 10/15/20/25GR
SLEEP POWER
(Red)
(Green/Red)
/
Green
/
Red
/
Red
/
Green
1 time
2 times
3 times
Red
ON /
Board
LWS2.0 G17 / SLM3 / Netware 3 / SLM8
TIMER IONIZER
(Orange) (Green)
/
/
/
/
/
/
1 time
3 times
6 times
ON or OFF
Handset
Error Code
Operation / Faulty
(SLM3 /
Indication
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
Heat LED
blinking Defrost mode
(SLM3 only)
E5 Gas leak
Hardware error
E8 (tact switch pin
short)
BLINKING
51
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