Specifications

SiBE06-708 Troubleshooting
Service Diagnosis 87
4. Troubleshooting
4.1 Error Codes and Description

: Displayed only when system-down occurs.
Code Indication Description
Reference
Page
System
00
Normal —
U0
Insufficient gas 129
U2
Low-voltage detection or over-voltage detection 133
U4
Signal transmission error (between indoor and outdoor unit) 94
UA
Unspecified voltage (between indoor and outdoor unit) 96
Indoor
Unit
A1
Indoor unit PCB abnormality 88
A5
Freeze-up protection control or high pressure control 89
A6
Fan motor or related abnormality 91
C4
Heat exchanger temperature thermistor abnormality 93
C9
Room temperature thermistor abnormality 93
Outdoor
Unit
E1
Outdoor unit PCB abnormality 97
E5
OL activation (compressor overload) 98
E6
Compressor lock 99
E7
DC fan lock 100
E8
Input over current detection 101
EA
Four way valve abnormality 104
F3
Discharge pipe temperature control 108
F6
High pressure control in cooling 110
H0
Compressor system sensor abnormality 112
H6
Position sensor abnormality 115
H8
DC voltage/current sensor abnormality 116
CT or related abnormality 117
H9
Outdoor air thermistor or related abnormality 119
J3
Discharge pipe temperature thermistor or related abnormality 119
J6
Heat exchanger temperature thermistor or related abnormality 119
L3
Electrical box temperature rise 121
L4
Radiation fin temperature rise 123
L5
Output over current detection 127
P4
Heat radiation fin thermistor or related abnormality 119
U7
Signal transmission error on outdoor unit PCB 135