Daikin FTXS09HVJU - Low-Voltage Detection

Troubleshooting SiUS04-904
Service Diagnosis 143
4.23 Low-voltage Detection
Remote
Controller
Display
U2
Method of
Malfunction
Detection
An abnormal voltage drop is detected by checking the DC voltage detection circuit.
Malfunction
Decision
Conditions
 The voltage being detected by the DC voltage detection circuit is judged to be below 150 V for
0.1 second.
 The system is shut down if the error occurs 16 times.
 Clearing condition: Continuous run for about 60 minutes (normal)
Supposed
Causes
 Supply voltage not as specified
 DC voltage detection circuit defective
 PAM control part(s) defective
 Short circuit inside the fan motor winding.
Troubleshooting
Correct the power supply.
Check for such factors for
an extended period of time.
* Try to get restarted a
couple of times.
(R0285)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
YES
YES
NO
YES
(Precaution before turning on the power again)
NO
Replace fan motor and
outdoor unit PCB.
Replace the outdoor unit
PCB.
Check the supply voltage.
Rotate fan by hand.
Disturbance factors
* Noise * Power supply distortion
Repeat a
Make sure the power has been off for
Turn on the
power again. System
restarted?
Does fan rotate
smoothly?
Supply voltage
as specified?