59
Troubleshooting
MWM-J-2009
LED Indoor Lights: Normal Operation and Fault Conditions for Cooling / Heat Pump Unit
1
COOL/HEAT
(GREEN/RED)
Error Code Normal Operation / Fault Indication
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
3 times
Blink E3
Outdoor coil sensor open
2 times
Blink E2
Indoor coil sensor open
1 time
Blink E4
Compressor overload / indoor coil sensor short /
outdoor coil sensor short
Red
-
Defrost operation
3 times
Blink E5
Gas leak
6 times
Blink E8
Hardware error (tact switch pin short)
4 times
Blink E9
No feedback from indoor fan
5 times
Blink EE
EEPROM defrost
ON
ON or OFF
Blinking
Note: The unit will not detect sensor missing when the compressor is ON.
Catalog.indb 59
Catalog.indb 59
3/2/2009 4:41:33 PM
3/2/2009 4:41:33 PM