Troubleshooting; Error Codes And Description - Daikin FTKM-U Series Service Manual

Troubleshooting

4. Troubleshooting

4.1

Error Codes and Description

System
Indoor
Unit
Outdoor
Unit
: Displayed only when system down occurs.
56
Error
Codes
00 Normal
U0 Refrigerant shortage
U2 Low-voltage detection or over-voltage detection
U4 Signal transmission error (between indoor unit and
outdoor unit)
UA Unspecified voltage (between indoor unit and outdoor
unit)
A1 Indoor unit PCB abnormality
A5 Freeze-up protection control
A6 Indoor fan motor (DC Motor) or related abnormality
C4 Indoor heat exchanger thermistor or related abnormality
C9 Room temperature thermistor or related abnormality
E1 Outdoor unit PCB abnormality
E5 OL activation (compressor overload)
E6 Compressor lock
E7 DC fan lock
E8 Input overcurrent detection
F3 Discharge pipe temperature control
F6 High pressure control in cooling
F8 System shutdown due to temperature abnormality in
compressor
H0 Compressor system sensor abnormality
H6 Position sensor abnormality
H8 DC voltage/current sensor abnormality
H9 Outdoor temperature thermistor or related abnormality
J3 Discharge pipe thermistor or related abnormality
J6 Outdoor heat exchanger thermistor or related
abnormality
L3 Electrical box temperature rise
L4 Radiation fin temperature rise
L5 Output overcurrent detection
P4 Radiation fin thermistor or related abnormality
— None Unknown
Description
SiMX042215E
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Part 6 Service Diagnosis