Specifications

Si04-306B Troubleshooting
Service Diagnosis 99
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
128
U2
Low-voltage detection
130
U4
Signal transmission error (between indoor and outdoor units)
106
Indoor
Unit
A1
Indoor unit PCB abnormality
100
A5
Freeze-up protection control or high pressure control
101
A6
Fan motor or related abnormality
103
C4
Heat exchanger thermistor abnormality
105
C9
Room temperature thermistor abnormality
105
Outdoor
Unit
E5★
OL activation (compressor overload)
107
E6★
Compressor lock
108
E7
DC fan lock
109
E8
Input over current detection
110
EA
Four way valve abnormality
112
F3
Discharge pipe temperature control
114
F6
High pressure control in cooling
115
H6
Position sensor abnormality
117
H8
CT or related abnormality
118
H9
Outdoor air thermistor or related abnormality
120
J3
Discharge pipe thermistor or related abnormality
120
J6
Heat exchanger thermistor or related abnormality
120
L3
Electrical box temperature rise
122
L4
Radiation fin temperature rise
124
L5
Output over current detection
126
P4
Radiation fin thermistor or related abnormality
120