SiBE04-809 Troubleshooting
Service Diagnosis 77
4. Troubleshooting
4.1 Error Codes and Description
★
: Displayed only when system-down occurs.
Code Indication Description
Reference
Page
System
00
Normal
—
U0★
Insufficient gas
111
U2
Low-voltage detection or over-voltage detection
113
U4
Signal transmission error (between indoor and outdoor units)
85
U5
Signal transmission error (between indoor unit and wired remote
controller)
86
UA
Unspecified voltage (between indoor and outdoor unit) 87
Indoor
Unit
A1
Indoor unit PCB abnormality
78
A5
Freeze-up protection control or high pressure control
79
A6
Fan motor or related abnormality
81
C4
Heat exchanger temperature thermistor abnormality
83
C7
Front panel open/close fault
84
C9
Room temperature thermistor abnormality
83
Outdoor
Unit
E1
Outdoor unit PCB abnormality
88
E5★
OL activation (compressor overload)
89
E6★
Compressor lock
90
E7
DC fan lock
91
E8
Input over current detection
92
EA
Four way valve abnormality
93
F3
Discharge pipe temperature control
95
F6
High pressure control in cooling
97
H0
Compressor system sensor abnormality
99
H6
Position sensor abnormality
100
H8
DC voltage/current sensor abnormality 102
H9
Outdoor air thermistor or related abnormality
103
J3
Discharge pipe temperature thermistor or related abnormality
103
J6
Heat exchanger temperature thermistor or related abnormality
103
L3
Electrical box temperature rise
105
L4
Radiation fin temperature rise
107
L5
Output over current detection
109
P4
Heat radiation fin thermistor or related abnormality
103
U7
Signal transmission error on outdoor unit PCB 115
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