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SiBE041102_A
Troubleshooting
Service Diagnosis
53
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
83
U2
Low-voltage detection or over-voltage detection
85
U4
Signal transmission error (between indoor unit and outdoor unit)
60
UA
Unspecified voltage (between indoor unit and outdoor unit)
62
Indoor
Unit
A1
Indoor unit PCB abnormality
54
A5
Freeze-up protection control or heating peak-cut control
55
A6
Fan motor (AC motor) or related abnormality
57
C4
Indoor heat exchanger thermistor or related abnormality
59
C9
Room temperature thermistor or related abnormality
59
Outdoor
Unit
E1
Outdoor unit PCB abnormality
63
E5
OL activation (compressor overload)
64
E6
Compressor lock
65
E8
Input overcurrent detection
66
EA
Four way valve abnormality
67
F3
Discharge pipe temperature control
69
F6
High pressure control in cooling
70
H0
Compressor system sensor abnormality
71
H6
Position sensor abnormality
72
H8
DC voltage / current sensor abnormality
74
H9
Outdoor temperature thermistor or related abnormality
75
J3
Discharge pipe thermistor or related abnormality
75
J6
Outdoor heat exchanger thermistor or related abnormality
75
L3
Electrical box temperature rise
77
L4
Radiation fin temperature rise
79
L5
Output overcurrent detection
81
P4
Radiation fin thermistor or related abnormality
75