Service manual

Service Manual SM-MDS_(i) 61
6.2 Error Code for Decorative Type Indoor
Page
Cool/Heat Sleep/Fan Dry/Timer
BLINKING OFF OFF
Communication error
Error Code #1
Description
Possible causes
• 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
76
Cool/Heat Sleep/Fan Time/Dry
OFF OFF BLINKING
Indoor sensor error
Error Code #2
Description
Possible causes
• Indoor sensor broken or loose
73
Cool/Heat Sleep/Fan Time/Dry
OFF BLINKING OFF
Indoor pump error
Error Code #3
Description
Possible causes
• Water level switch broken
• Indoor pump broken
75
Cool/Heat Sleep/Fan Time/Dry
OFF BLINKING BLINKING
Outdoor sensor error
Error Code #4
Description
Possible causes
• Outdoor sensor broken or loose
73
Cool/Heat Sleep/Fan Time/Dry
BLINKING BLINKING ON
Outdoor pressure sensor error
Error Code #5
Description
Possible causes
• High/low pressure sensor broken or loose
• Outdoor PCB HS/LS port broken
74
6