Mars DVH Series - Page 47

Service Manual - DVH 09/12/18/24 SF Series
Service Manual - DVH 09/12/18/24 SF Series
47
49
9.3.8 Over voltage or too low voltage protection diagnosis and solution (P1)
Error Code
P1
Malfunction conditions An abnormal voltage rise or drop is detected by checking the
specified voltage detection circuit.
Possible causes
● Power supply problems.
● System leakage or blockage
● 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
Remark:
Measure the DC voltage
between P and N port. The
normal value should be
around 310V.
P
N