
Troubleshooting SiBE04-624_B
74 Service Diagnosis
2. Troubleshooting
2.1 Error Codes and Description
Code Unit Description Reference page
Basic Failure Diagnosis
Air conditioner does not run. 75
Air conditioner runs but does not cool (heat) the room. 78
When operation starts, safety breaker works. 80
Air conditioner makes big noise and vibration. 82
Air is not humidified enough. 83
No display System Lights-out of microcomputer status lamp 85
A1
Indoor
Indoor unit PCB abnormality 86
A5
Freeze-up protection control or heating peak-cut control 87
A6
Fan motor (DC motor) or related abnormality 89
AH
Streamer unit abnormality 91
C4
Indoor heat exchanger thermistor or related abnormality 93
C7
Front panel open / close abnormality 94
C9
Room temperature thermistor or related abnormality 93
CC
Humidity sensor abnormality 95
E1
Outdoor
Outdoor unit PCB abnormality 107
E5
OL activation (compressor overload) 108
E6
Compressor lock 110
E7
DC fan lock 111
E8
Input overcurrent detection 112
EA
Four way valve abnormality 113
F3
Discharge pipe temperature control 115
F6
High pressure control in cooling 116
H0
Compressor system sensor abnormality 117
H1
Humidifying unit Damper abnormality 118
H6
Outdoor
Position sensor abnormality 119
H8
DC voltage / current sensor abnormality 121
H9
Outdoor temperature thermistor or related abnormality 122
J3
Discharge pipe thermistor or related abnormality 122
J6
Outdoor heat exchanger thermistor or related abnormality 122
L3
Electrical box temperature rise 124
L4
Radiation fin temperature rise 126
L5
Output overcurrent detection 128
P4
Radiation fin thermistor or related abnormality 122
P9
Humidifying unit
Fan motor system abnormality / fan lock 130
PA
Heater wire abnormality 131
PH
Humidifying thermistor abnormality / humidifying heater
temperature abnormality
132
U0
System
Refrigerant shortage 96
U2
Low-voltage detection or over-voltage detection 98
U4
Signal transmission error (between indoor unit and outdoor unit) 100
Outdoor Outdoor unit PCB abnormality or communication circuit abnormality 101
U7
System
Signal transmission error on outdoor unit PCB 104
UA
Unspecified voltage (between indoor unit and outdoor unit) 105
Indoor Incomplete setting for hose length 106
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