Troubleshooting; Error Code Indication By Remote Controller - Daikin Quaternity FTXG09HVJU Service Manual

SiUS04-921

2. Troubleshooting

2.1

Error Code Indication by Remote Controller

Code Unit
Basic Failure Diagnosis
A1
A5
A6
AH
Indoor
C4
C7
C9
CC
E1
E5
E6
E7
E8
Outdoor
EA
F3
F6
H0
H6
H8
H9
J3
J6
Outdoor
L3
L4
L5
P4
U0
U2
System
U4
Outdoor
U7
System
UA
– System
Service Diagnosis
Air conditioner does not run.
Air conditioner runs but does not get cooling (heating).
When operation starts, safety breaker trips.
Air conditioner makes a loud noise and vibrates.
Indoor unit PCB abnormality
Peak-cut control or freeze-up protection
Fan motor system abnormality
Streamer unit abnormality
Indoor heat exchanger thermistor abnormality
Front panel open / close abnormality
Room temperature thermistor abnormality
Humidity sensor abnormality
Outdoor unit PCB abnormality
OL activation (compressor overload)
Compressor lock
DC fan lock
Input overcurrent detection
Four-way valve abnormality
Discharge pipe temperature control
High pressure control in cooling
Compressor sensor system abnormality
Position sensor abnormality
DC voltage / DC current sensor abnormality
Outdoor air thermistor abnormality
Discharge pipe thermistor abnormality
Outdoor heat exchanger thermistor abnormality
Abnormal temperature in electrical box
Temperature rise in radiation fin
Output overcurrent
Radiation fin thermistor abnormality
Insufficient gas
Over voltage protection (OVP) / low voltage protection (LVP)
Signal transmission error (indoor unit - outdoor unit)
Outdoor unit PCB abnormality or communication circuit abnormality
Signal transmission error on outdoor unit PCB
Incompatible power supply between indoor unit and outdoor unit
Lights-out of microcomputer status lamp
Description

Troubleshooting

* Various cases may be possible.
Reference page
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