Service manual

SiBE05-722ED Troubleshooting
Service Diagnosis 62
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 68
U2
Low-voltage detection or over-voltage detection 70
U4
Signal transmission error (between indoor unit and outdoor unit) 72
UA
Unspecified voltage (between indoor unit and outdoor unit) 74
Indoor
Unit
A1
Indoor unit PCB abnormality 63
A5
Freeze-up protection control / heating peak-cut control 64
A6
Fan motor (AC motor) or related abnormality 65
C4
Indoor heat exchanger thermistor or related abnormality 67
C9
Room temperature thermistor or related abnormality 67
Outdoor
Unit
E1
Outdoor unit PCB abnormality 75
E5★
OL activation (compressor overload) 76
E6★
Compressor lock 78
E7★
DC fan lock 79
E8
Input overcurrent detection 80
EA
Four way valve abnormality 81
F3
Discharge pipe temperature control 83
F6
High pressure control in cooling 84
H0
Compressor system sensor abnormality 85
H6
Position sensor abnormality 86
H8
DC voltage / current sensor abnormality 88
H9
Outdoor temperature thermistor or related abnormality 89
J3★
Discharge pipe thermistor or related abnormality 89
J6
Outdoor heat exchanger thermistor or related abnormality 89
L3
Electrical box temperature rise 91
L4
Radiation fin temperature rise 94
L5★
Output overcurrent detection 97
P4
Radiation fin thermistor or related abnormality 89