Vivax ACP-12CC35AECI Service Manual page 157

Troubleshooting
2.4.4.10. P3 malfunction
P3 display
Current protection of compressor
The protection occurred in
standby
No
Check whether the power
voltage is normal.
Yes
Measure whether outdoor
terminal voltage is normal？
Yes
Measure whether the voltage
between L and N is normal？
Yes
Measure whether input voltage
of bridge rectifier is normal？
Yes
Measure whether the
current is normal？
No
Measure whether the voltage
between P and N is normal
refer to the Appendix 3？
Yes
Check whether the outdoor
ambient temperature is
higher than 50℃
No
Check if the outdoor unit
ventilation is good
Yes
Check if the outdoor fan
runs properly
Yes
Check whether the heat
exchanger is dirty
No
Replace outdoor main
board
No
Check whether system pressure
is too high
No
Check whether the refrigerant
system is ok
154
Restart the unit when the power
No
Check the wiring of
No power wires well or
correctly
Check the wiring of
No L and N well or
correctly
Check the wiring of
No bridge rectifier well
or correctly
Yes Replace the outdoor main PCB
No
Yes Stop the unit
No
Make the outdoor unit ventilate well
please refer to the solution of fan
speed has been out of control
No
malfunction . Find out the cause and
have it solved.
Yes Clean the heat exchanger
Recycle the over charged
Yes
refrigerant
supply gets normal
Reconnect it well
Reconnect it well
Reconnect it well
Check whether
bridge rectifier is
normal
Yes
Replace the PFC module(If has)
No
Check the wiring of
reactor or inductance
Yes
Check whether reactor
or inductance is normal
Yes
Yes
Replace the bridge
No
rectifier
Reconnect the
No
wiring
Replace reactor or
No
inductance
Electrical Control System