66
MWM-J_(ii) Troubleshooting
LED Indoor Lights: Normal Operation and Fault Conditions for Cooling / Heat Pump Unit
1
COOL/HEAT
(GREEN/RED)
Error
Code
Normal Operation / Fault Indi-
cation
Action
Green
- Cool mode -
Red
- Heat mode -
Red
- Auto mode in Heating operation -
Green
- Auto mode in Cooling operation -
- Time on -
- Sleep mode on -
- Fan mode on -
- Dry mode on -
1 time
Blink E1
Room air sensor contact loose
/ short
Check room sensor connection /
change room air sensor
3 times
Blink E3 Outdoor coil sensor open
Check outdoor coil sensor
connection / change outdoor coil
sensor
2 times
Blink E2 Indoor coil sensor open
Check indoor coil sensor
connection / change indoor coil
sensor
1 time
Blink E4
Compressor overload / indoor
coil sensor short /
outdoor coil sensor short
If running ampere highly increase,
change the compressor. If not,
replace the coil sensor.
Red
- Defrost operation -
3 times
Blink E5 Gas leak
Top up refrigerant / check for
leakage
6 times
Blink E8
Hardware error (tact switch pin
short)
Contact your distributor
4 times
Blink E9 No feedback from indoor fan Contact your distributor
5 times
Blink
EE
EEPROM defrost Contact your distributor
ON ON or OFF Blinking
Note: The unit will not detect sensor missing when the compressor is ON.
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