McQuay MWM User Manual

MCQUAY Service Guide Book Diagnosis
58
Inverter - X Outdoor Unit
Model Board
MLCX 10/15/20/25C/CR VB2.0
MMSV 25/35A VB2.0
AMSX 20/25/30A/AR VB2.0
Normal running / compressor running RED LED blinking
No. of Blinks Blinking Indication
1 Normal running, with no limitation
2 Voltage limit
3
Cooling unit: outdoor coil temperature limit
Heating unit: indoor coil temperature limit
4 Total current limit
5 Discharge temperature limit
6 Cooling unit: indoor coil temperature limit
7 Indoor fan control
8 Outdoor frequency adjustment
Compressor stopped Error Indication
No. of Blinks
Faulty Indication
No. of Blinks
Faulty Indication
Red Yellow Red Yellow
0 1 Outdoor ambient sensor error 1 5 DC fan motor feedback error
0 2 Outdoor coil sensor error 1 6 AC peak current error
0 3
Outdoor discharge sensor error
/ compressor overheat
1 7 Outdoor suction sensor error
0 4 DC compressor feedback error 1 8 None
0 5 Communication error 1 9 DC compressor speed control error
0 6 Over current error 2 0 None
0 7 No load 2 1 Outdoor suction pipe A sensor error
0 8 Over / under voltage 2 2 Outdoor suction pipe B sensor error
0 9 DC compressor start failure 2 3 Outdoor suction pipe C sensor error
1 0 Cooling overload 2 4 Outdoor suction pipe D sensor error
1 1 Defrost 3 1 Communication error with indoor A
1 2 IPM protection 3 2 Communication error with indoor B
1 3 Read EEPROM error 3 3 Communication error with indoor C
1 4 Write EEPROM error 3 4 Communication error with indoor D

McQuay MWM Specifications

General

Brand	McQuay
Model	MWM
Category	Air Conditioner
Language	English