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SiBE041010
Troubleshooting
Service Diagnosis
57
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
87
U2
Low-voltage detection or over-voltage detection
89
U4
Signal transmission error (between indoor and outdoor unit)
64
UA
Unspecified voltage (between indoor and outdoor unit)
65
Indoor
Unit
A1
Indoor unit PCB abnormality
58
A5
Freeze-up protection control or heating peak-cut control
59
A6
Fan motor (DC motor) or related abnormality
61
C4
Indoor heat exchanger thermistor or related abnormality
63
C9
Room temperature thermistor or related abnormality
63
Outdoor
Unit
E1
Outdoor unit PCB abnormality
66
E5
★
OL activation (compressor overload)
67
E6
★
Compressor lock
68
E7
DC fan lock
69
E8
Input overcurrent detection
70
EA
Four way valve abnormality
71
F3
Discharge pipe temperature control
73
F6
High pressure control in cooling
74
H0
Compressor system sensor abnormality
75
H6
Position sensor abnormality
76
H8
DC voltage / current sensor abnormality
78
H9
Outdoor temperature thermistor or related abnormality
79
J3
Discharge pipe thermistor or related abnormality
79
J6
Outdoor heat exchanger thermistor or related abnormality
79
L3
Electrical box temperature rise
81
L4
Radiation fin temperature rise
83
L5
Output overcurrent detection
85
P4
Radiation fin thermistor or related abnormality
79