Specifications
Troubleshooting Si01-406
86 Service Diagnosis
4. Troubleshooting
4.1 Error Codes
★
: Displayed only when system-down occurs.
Code Description
Reference
Page
System
00
Normal —
U0★
Insufficient gas 113
U4
Signal transmission error (between indoor and outdoor units) 95
Indoor
Unit
A1
Indoor unit PCB abnormality 87
A5
Freeze-up protection control or high pressure control 88
A6
Fan motor or related abnormality
AC motor 90
DC motor 91
C4
Heat exchanger thermistor abnormality 93
C9
Room temperature thermistor abnormality 93
∗
Indoor unit PCB abnormality 94
Outdoor
Unit
E5★
OL activation (compressor overload) 96
E6★
Compressor lock 97
E8
Input over current detection 98
EA
Four way valve abnormality 99
F6
High pressure control in cooling 101
H8
CT or related abnormality 103
H9
Outdoor air thermistor or related abnormality 105
J6
Heat exchanger thermistor or related abnormality 105
L3
Electrical box temperature rise 107
L4
Radiation fin temperature rise 109
L5
Output over current detection 111
P4
Radiation fin thermistor or related abnormality 105