McQuay MDS 100B User Manual

Service Manual SM-MDS_(ii) 61
6.2 Error Code for Decorative Type Indoor
Page
Error Code #1
Description
Possible causes
Cool/Heat
Sleep/Fan
Dry/Timer
BLINKING
OFF
OFF
Communication error
76
 Indoor and outdoor communication wire broken
 Indoor and outdoor communication wire loose
 Indoor and outdoor communication wire A and B reversed
 Communication wire too long, should less than 1000m
 Outdoor PCB not power on
 Indoor and outdoor jumper not correct, still on update status
 Last indoor unit terminal resistance of communication wire not short-circuit
 Indoor and outdoor PCB program not compatible
 Indoor and outdoor PCB abnormal
Error Code #2
Description
Possible causes
Cool/Heat
Sleep/Fan
Time/Dry
OFF
OFF
BLINKING
Indoor sensor error
73
 Indoor sensor broken or loose
Error Code #3
Description
Possible causes
Cool/Heat
Sleep/Fan
Time/Dry
OFF
BLINKING
OFF
Indoor pump error
75
 Water level switch broken
 Indoor pump broken
Error Code #4
Description
Possible causes
Cool/Heat
Sleep/Fan
Time/Dry
OFF
BLINKING
BLINKING
Outdoor sensor error
73
 Outdoor sensor broken or loose
Error Code #5
Description
Possible causes
Cool/Heat
Sleep/Fan
Time/Dry
BLINKING
BLINKING
ON
Outdoor pressure sensor error
74
 High/low pressure sensor broken or loose
 Outdoor PCB HS/LS port broken
6

McQuay MDS 100B Specifications

General

Brand	McQuay
Model	MDS 100B
Category	Compressor
Language	English