Service Manual

SiUS071735E 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 —
U2 Low-voltage detection or over-voltage detection 73
U4 Signal transmission error (between indoor unit and outdoor unit) 75
UA Mismatching of indoor unit and outdoor unit 77
Indoor
Unit
A1 Indoor unit PCB abnormality 63
A3 Drain level control system abnormality 64
A6 Indoor fan motor (DC motor) or related abnormality 65
A8 Indoor fan PCB abnormality 67
AF Humidifier or related abnormality 68
C4 Indoor heat exchanger thermistor 1 or related abnormality 69
C5 Indoor heat exchanger thermistor 2 or related abnormality 69
C9 Room temperature thermistor or related abnormality 69
CJ Remote controller thermistor abnormality 70
U5
Signal transmission error (between indoor unit and remote
controller)
71
U8
Signal transmission error (between MAIN remote controller and
SUB remote controller)
72
Outdoor
Unit
E1 Outdoor unit PCB abnormality 78
E5+ OL activation (compressor overload) 79
E6+ Compressor lock 81
E7+ DC fan lock (outdoor fan motor) 82
E8 Input overcurrent detection 83
EA Four way valve abnormality 84
F3 Discharge pipe temperature control 86
F6 High pressure control in cooling 87
F8
System shutdown due to compressor internal temperature
abnormality
89
H0 Compressor system sensor abnormality 90
H6 Position sensor abnormality 91
H9 Outdoor temperature thermistor or related abnormality 93
J3+ Discharge pipe thermistor or related abnormality 93
J6 Outdoor heat exchanger thermistor or related abnormality 93
L3 Electrical box temperature rise 95
L4 Radiation fin temperature rise 96
L5+ Output overcurrent detection 97
P4 Radiation fin thermistor or related abnormality 93