Troubleshooting
SiBE041010EA
51
Service Diagnosis
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
57
U2
Low-voltage detection or over-voltage detection
59
U4
Signal transmission error (between indoor unit and outdoor unit)
61
UA
Unspecified voltage (between indoor unit and outdoor unit)
63
Indoor
Unit
A1
Indoor unit PCB abnormality
52
A5
Freeze-up protection control or heating peak-cut control
53
A6
Fan motor (DC motor) or related abnormality
54
C4
Indoor heat exchanger thermistor or related abnormality
56
C9
Room temperature thermistor or related abnormality
56
Outdoor
Unit
E1
Outdoor unit PCB abnormality
64
E5
OL activation (compressor overload)
65
E6
Compressor lock
67
E7
DC fan lock
68
E8
Input overcurrent detection
69
EA
Four way valve abnormality
70
F3
Discharge pipe temperature control
72
F6
High pressure control in cooling
73
H0
Compressor system sensor abnormality
74
H6
Position sensor abnormality
75
H8
DC voltage / current sensor abnormality
77
H9
Outdoor temperature thermistor or related abnormality
78
J3
Discharge pipe thermistor or related abnormality
78
J6
Outdoor heat exchanger thermistor or related abnormality
78
L3
Electrical box temperature rise
80
L4
Radiation fin temperature rise
81
L5
Output overcurrent detection
83
P4
Radiation fin thermistor or related abnormality
78