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SiBE07-618_D
Troubleshooting
Service Diagnosis
59
4. Troubleshooting
4.1
Error Codes and Description
★
: Displayed only when system-down occurs.
Error Codes
Description
Reference
Page
System
00
Normal
—
U0
★
Refrigerant shortage
89
U2
Low-voltage detection or over-voltage detection
91
U4
Signal transmission error (between indoor unit and outdoor unit)
65
UA
Unspecified voltage (between indoor unit and outdoor unit)
66
Indoor
Unit
A1
Indoor unit PCB abnormality
60
A5
Freeze-up protection control or heating peak-cut control
61
A6
Fan motor (AC motor) or related abnormality
63
C4
Indoor heat exchanger thermistor or related abnormality
64
C9
Room temperature thermistor or related abnormality
64
Outdoor
Unit
E1
Outdoor unit PCB abnormality
67
E5
★
OL activation (compressor overload)
68
E6
★
Compressor lock
69
E7
DC fan lock
70
E8
Input overcurrent detection
71
EA
Four way valve abnormality
72
F3
Discharge pipe temperature control
74
F6
High pressure control in cooling
75
H0
Compressor system sensor abnormality
76
H6
Position sensor abnormality
77
H8
CT or related abnormality
79
H9
Outdoor temperature thermistor or related abnormality
81
J3
Discharge pipe thermistor or related abnormality
81
J6
Outdoor heat exchanger thermistor or related abnormality
81
L3
Electrical box temperature rise
83
L4
Radiation fin temperature rise
85
L5
Output overcurrent detection
87
P4
Radiation fin thermistor or related abnormality
81
U7
Signal transmission error (on outdoor unit PCB)
92