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Troubleshooting
SiBE12-908
107
Service Diagnosis
2. Troubleshooting
2.1
Error Code Indication by Remote Controller
* Various cases may be possible.
Code
Unit
Description
Reference page
Basic Failure Diagnosis
Air conditioner does not run.
109
Air conditioner runs but does not get cooling (heating).
112
When operation starts, safety breaker works.
114
Air conditioner makes big noise and vibration.
116
Air does not humidified enough.
117
A1
Indoor
Indoor unit PCB abnormality
120
A5
Freeze-up protection or heating peak-cut control
121
A6
Fan motor or related abnormality
123
C4
Indoor heat exchanger thermistor abnormality
125
C9
Room temperature thermistor abnormality
125
CC
Humidity sensor abnormality
126
E1
Outdoor
Outdoor unit PCB abnormality
132
E5
OL activation (compressor overload)
133
E6
Compressor lock
134
E7
DC fan lock
135
E8
Input overcurrent detection
136
F3
Discharge pipe temperature control
138
F6
High pressure control in cooling
139
H0
Compressor sensor system abnormality
141
H1
Humidifying unit Damper abnormality
142
H6
Outdoor
Position sensor abnormality
143
H8
DC voltage / DC current sensor abnormality
145
H9
Outdoor air thermistor abnormality
146
J3
Discharge pipe thermistor abnormality
146
J6
Outdoor heat exchanger thermistor abnormality
146
J8
Liquid pipe thermistor abnormality
146
J9
Gas pipe thermistor abnormality
146
L3
Abnormal temperature in electrical box
148
L4
Temperature rise in radiation fin
150
L5
Output overcurrent
152
P4
Radiation fin thermistor abnormality
146
P9
Humidifying unit
Fan motor system abnormality / fan lock
162
PA
Heater wire abnormality
163
PH
Humidification fan outlet thermistor abnormality / abnormal heater
temperature
165
U0
System
Refrigerant shortage
154
U2
Over voltage protection (OVP) / low voltage protection (LVP)
156
U4
Signal transmission error (indoor unit - outdoor unit)
127
Outdoor
Outdoor unit PCB abnormality or communication circuit abnormality
157
U7
System
Signal transmission error on outdoor unit PCB
160
UA
Incompatible power supply between indoor unit and outdoor unit
129
Indoor
Incomplete setting for hose length
130