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40
DIAGNOSIS AND SOLUTION (CONT)
Over voltage or too low voltage protection diagnosis and solution (P1)
Error Code
P1
Malfunction decision conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
Supposed causes
S Power supply problems
S System leakage or block
S PCB faulty
Troubleshooting
Check the power supply
Check the connections and
wires
Stop the unit
No
Yes
No
Correct the connections or
replace the wires.
Yes
Replace the reactor
Yes
No
Replace the IPM board
Check the voltage between P
and N
Check the reactor
Yes
No
Replace outdoor main PCB
Fig. 42 – Test
NOTE: Measure the DC voltage between the P and N port. The normal value should be around 310V.
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