Troubleshooting DAMA-SM-21-001
57 Service Diagnosis
4. Troubleshooting
4.1 Error Codes and Description
Displayed only when the system is shut down.
Error
Codes
Description Reference Page
System
00
Normal condition -
U2
Low-voltage detection or over-voltage detection 64
U4
Signal transmission error (between indoor unit and outdoor unit) 65
UA
Installation error (between indoor unit and outdoor unit) 67
Indoor Unit
A1
Indoor unit PCB abnormality 59
A5
Freeze-up protection control 60
A6
Indoor fan motor (DC motor) or related abnormality 61
C4
Indoor heat exchanger thermistor or related abnormality 62
C9
Room temperature thermistor or related abnormality 63
Outdoor Unit
E1
Outdoor unit PCB abnormality 68
E5
OL activation (compressor overload) 69
E6
Compressor lock 71
E7
DC fan lock 72
E8
Input overcurrent detection 73
F3
Discharge pipe temperature control 74
F6
High pressure control in cooling 75
EA Four way valve abnormality 85
H0
Compressor sensor system abnormality 77
H6
Position sensor abnormality 78
H9
Outdoor temperature thermistor or related abnormality 79
J3
Discharge pipe thermistor or related abnormality 79
J6
Outdoor heat exchanger thermistor or related abnormality 79
L3
Electrical box temperature rise 81
L4
Radiation fin temperature rise 82
L5
Output overcurrent detection 83
P4
Radiation fin thermistor or related abnormality 79
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