Over Voltage Or Too Low Voltage Protection Diagnosis And Solution (P1) - COMFORT-AIRE A-DVC24SF-1 Service Manual

8.2.9 Over voltage or too low voltage protection diagnosis and solution (P1)

Error Code
Malfunction conditions
Possible causes
Troubleshooting:
Check the power supply
OK
Check the connections and
wires
OK
Check the voltage between P
and N
OK
Check the reactor
Bad
Replace the reactor
P1
An abnormal voltage rise or drop is detected by checking the
specified voltage detection circuit.
Power supply problems.
●
System leakage or blockage
●
PCB faulty
●
Not
within
parameters
Bad
Bad
OK
P
N
50
Service Manual - DVC 09/12/18/24 SF Series
Stop the unit
Correct the connections or
replace the wires.
Replace the IPM board
Replace outdoor main PCB
Remark:
Measure the DC voltage
between P and N port. The
normal value should be
around 310V.
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