Pioneer WD Series, Service Manual

Page: 24 / 40

23
(12) Display P0
Symptom Display P0
Cause Variable-frequency drive
Inspections How to Solve Remarks
If this code is displayed when the
compressor is started for several seconds
or even not started, check the compressor
connection for correctness.
If no insert wrong, replace the
intelligent power module
Photo 22
Check if the outdoor
intelligent power module
is tightly installed onto
the radiating fins and if
the silicone is applied
evenly.
Fix the radiator again if loose. Photo 23
Check the system
pressure.
Recharge refrigerant if the pressure
is low. Discharge some refrigerant if
the pressure is too high.
Check the outdoor
ventilation and if there is
any obstruction that
affects the normal
radiating of the air
conditioner.
Install to the position as required in
the Instruction Manual and ensure
the air inlet and outlet of the
outdoor unit is smooth.
Re-energize
and check the
protection
code on
display.
Firstly
display P0
“P0” appears
when the air
conditioner
is working
The above inspections
are normal, but the fault
remains unsolved
Replace the intelligent power
module
The wires on U, V and W ends are
respectively colored “red, white and blue”.
If the screw is not
fixed tightly to
position, it is easy to
cause poor radiation
and damage to the
elements.