Troubleshooting; Error Codes And Description - Daikin FTXR-T Series Service Manual

Troubleshooting

4. Troubleshooting

4.1

Error Codes and Description

System
Indoor
Unit
Outdoor
Unit
: Displayed only when system-down occurs.
70
Error
Codes
00 Normal
U0 Refrigerant shortage
Low-voltage detection or over-voltage detection
U2
Signal transmission error (between indoor unit and outdoor
U4
unit)
UA Unspecified voltage (between indoor unit and outdoor unit)
A1 Indoor unit PCB abnormality
A5 Freeze-up protection control/heating peak-cut control
Fan motor (DC motor) or related abnormality
A6
Indoor heat exchanger thermistor or related abnormality
C4
C7 Front panel open/close fault
C9 Room temperature thermistor or related abnormality
E1 Outdoor unit PCB abnormality
OL activation (compressor overload)
E5
Compressor lock
E6
E7 DC fan lock
E8 Input overcurrent detection
EA Four way valve abnormality
Discharge pipe temperature control
F3
High pressure control in cooling
F6
F8 System shutdown due to compressor internal temperature
abnormality
H0 Compressor system sensor abnormality
H6 Position sensor abnormality
DC voltage/current sensor abnormality
H8
Outdoor temperature thermistor or related abnormality
H9
J3 Discharge pipe thermistor or related abnormality
J6 Outdoor heat exchanger thermistor or related abnormality
L3 Electrical box temperature rise
Radiation fin temperature rise
L4
Output overcurrent detection
L5
P4 Radiation fin thermistor or related abnormality
Description
SiUS041829E
Reference
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Part 6 Service Diagnosis