McQuay M4MC User Manual

MCQUAY Service Guide Book Diagnosis
54
Wall Mounted F Heatpump Inverter-X Model
Model Board Handset
MWMX 10/15FR VA2.0 G17 / SLM3
COOL/DRY
/
(Green)
HEAT
(Red)
STAND-
BY/FAN
(Orange)
TIMER
(Orange)
Error
Code
(SLM3)
Operation / Faulty
Indication
Action
-- Cooling mode -
-- Dry mode -
--
Stand-by / Fan
mode
-
-- Heating mode -
-- Auto mode -
-- Defrost mode -
E1
Indoor temperature
sensors contact
loose / short
Check indoor coil sensor
connection / change indoor
coil sensor
E2
Outdoor
temperature sensor
contact loose / short
Check outdoor coil sensor
connection / change
outdoor coil sensor
E3
Communication
error between
indoor and outdoor
Check connection wires
between indoor and
outdoor
E4
Compressor
overload protection
If running ampere highly
increase, change the
compressor
E6
Gas leak /
compressor
overheat
Check for leakage & repair
/ Top up refrigerant
E7
Inverter error / PFC
error
Check supply voltage and
compressor phase
E8
Outdoor total
current trip / DC
peak
Check the input current
and discharge pressure
E9
Indoor fan feedback
error
Check indoor fan motor /
fan motor wiring
/
ON ON or OFF BLINKING
/
/
/
/

McQuay M4MC Specifications

General

Brand	McQuay
Model	M4MC
Category	Air Conditioner
Language	English