McQuay MCK User Manual

MCQUAY Service Guide Book Diagnosis
63
Netware 3C / SLM 9 – Inverter Y Models (Except
5WMY-J/JR)
Error
Code
Faulty Indication
Error
Code
Faulty Indication
00 Normal H9 Outdoor air thermistor short/open
A1 Indoor PCB error J1 Pressure sensor error
A3 Drain pump fault J3
Compressor discharge pipe thermistor
short/open/misplaced
A5
Antifreeze(Cooling) / Heat exchanger
overheat(Heating)
J5 Suction pipe thermistor short/open
A6 Indoor fan motor fault J6
Outdoor heat exchanger thermistor
short/open
AH Electrical air cleaner fault J7
Sub cooling heat exchanger thermistor
short/open
C4
Indoor heat exchanger (1) thermistor
short/open
J8 Liquid pipe thermistor short/open
C5
Indoor heat exchanger (2) thermistor
short/open
J9 Gas pipe thermistor short/open
C7 Louver limit switch error L1 Inverter outdoor PCB error
C9 Indoor room thermistor short/open L3 Outdoor control box overheat
E1 Outdoor PCB error L4 Heat sink overheat
E3 High pressure protection L5 IPM error/IGBT error
E4 Low pressure protection L8 Electrical thermal switch
E5
Compressor motor lock/compressor
overloaded
L9 Stall prevention
E6 Compressor start-up error LC
Communication error (outdoor PCB &
inverter PCB)
E7 Outdoor DC fan motor lock P1 Open phase or voltage unbalance
E8 Ac input over current P4 Heat sink thermistor short/open
E9 EXV error PJ Capacity setting error
EA 4 way valve error U0 Insufficient gas
F3 Discharge pipe overheat U2 DC voltage out of range
F6 Heat exchanger overheat U4 Communication error
HO Compressor sensor system error U7
Communication error (outdoor PCB & IPM
PCB)
H3 High pressure switch error UA Installation error
H6 Compressor feedback detection error UF
Piping & wiring installation mismatch/wrong
wiring/insufficient gas
H7
Fan motor overloaded/over current/sensor
fault
UH Anti freeze (other rooms)
H8 AC current sensor error

McQuay MCK Specifications

General

Brand	McQuay
Model	MCK
Category	Air Conditioner
Language	English