Daikin FTX50K(M/2)V1B - Troubleshooting; Error Codes and Descriptions

Troubleshooting SiBE041525F
49 Service Diagnosis
4. Troubleshooting
4.1 Error Codes and Descriptions
: Displayed only when system-down occurs.
Error Codes Description
Reference
Page
System
00
Normal —
U2
Low-voltage detection or over-voltage detection 55
U4
Signal transmission error (between indoor unit and outdoor unit) 57
UA
Unspecified voltage (between indoor unit and outdoor unit) 59
Indoor
Unit
A1
Indoor unit PCB abnormality 50
A5
Freeze-up protection control / heating peak-cut control 51
A6
Fan motor (DC motor) or related abnormality 52
C4
Indoor heat exchanger thermistor or related abnormality 54
C9
Room temperature thermistor or related abnormality 54
Outdoor
Unit
E1
Outdoor unit PCB abnormality 60
E5
OL activation (compressor overload) 61
E6
Compressor lock 63
E7
DC fan lock 64
E8
Input overcurrent detection 65
EA
Four way valve abnormality 66
F3
Discharge pipe temperature control 68
F6
High pressure control in cooling 69
H0
Compressor system sensor abnormality 70
H6
Position sensor abnormality 71
H9
Outdoor temperature thermistor or related abnormality 73
J3
Discharge pipe thermistor or related abnormality 73
J6
Outdoor heat exchanger thermistor or related abnormality 73
L3
Electrical box temperature rise 75
L4
Radiation fin temperature rise 76
L5
Output overcurrent detection 77
P4
Radiation fin thermistor or related abnormality 73