Service manual

Si06-305 Troubleshooting
Service Diagnosis 73
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
99
U2
Over-voltage detection
101
U4
Signal transmission error (between indoor and outdoor units)
81
Indoor
Unit
A1
Indoor unit PCB abnormality
74
A5
Freeze-up protection control or high pressure control
75
A6
Fan motor or related abnormality
77
C4
Heat exchanger temperature thermistor abnormality
79
C7
Shutter drive motor / shutter limit switch abnormality
80
C9
Room temperature thermistor abnormality
79
Outdoor
Unit
E5★
OL activation (compressor overload)
82
E6★
Compressor lock
83
E8
Input over current detection
84
EA
Four way valve abnormality
85
F3
Discharge pipe temperature control
87
F6
High pressure control in cooling
102
H6
Position sensor abnormality
88
H8
CT or related abnormality
89
H9
Outdoor air thermistor or related abnormality
91
J3
Discharge pipe temperature thermistor or related abnormality
91
J6
Heat exchanger temperature thermistor or related abnormality
91
L3
Electrical box temperature rise
93
L4
Radiation fin temperature rise
95
L5
Output over current detection
97
P4
Heat radiation fin thermistor or related abnormality
91