MCQUAY Service Guide Book
Diagnosis
42
7.0 SERVICE DIAGNOSIS
7.1 LED Lights Diagnosis Table
Wall Mounted F Series Cooling Only
Model Board Handset
MWM 10/15/20/25F, 311
D2.0
G7
MWM 07/10/15/20/25F
L2EF
G7
POWER
(Green)
SLEEP
(Red)
TIMER
(Orange)
DRY
(Orange)
Operation / Faulty
Indication
Action
Timer
On
-
Sleep
mode
On
-
Dry mode
-
Defrost mode
-
Room air sensor
contact loose / short
Check room sensor connection /
change room sensor
Indoor coil sensor
contact loose / short
Check indoor coil sensor
connection / change indoor coil
sensor
Gas leak
Check for leakage & repair / Top
up refrigerant
/
ON
ON or OFF
BLINKING
/
/
Continuously
Once every 2s
3 times every 2s
Twice every 2s
Summary of Contents for 5MDS
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