McQuay MWM Service Manual page 54

MCQUAY Service Guide Book
Wall Mounted F Cooling Only Inverter-X Model
Model
MWMX 10/15F
TIMER SLEEP
(Orange) (Red)
ON /
Board
VA2.0
POWER DRY
(Green) (Orange)
/
ON or OFF
Handset
G17 / SLM3
Error
Operation / Faulty
Code
Indication
(SLM3)
Timer On
Sleep mode On
Dry mode
Indoor temperature
E1 sensors contact
loose / short
Outdoor temperature
E2 sensor contact loose
/ short
Communication
E3 error between indoor
and outdoor
Compressor
E4
overload protection
Gas leak /
E6 compressor
overheat
Inverter error / PFC
E7
error
Outdoor total current
E8
trip / DC peak
Indoor fan feedback
E9
error
BLINKING
53
Diagnosis
Action
-
-
-
Check indoor coil sensor
connection / change indoor
coil sensor
Check outdoor coil sensor
connection / change outdoor
coil sensor
Check the connection wires
between indoor and outdoor
If running ampere highly
increase, change the
compressor
Check for leakage & repair /
Top up refrigerant
Check supply voltage and
compressor phase
Check the input current and
discharge pressure
Check indoor fan motor / fan
motor wiring