Sharp CV-P09LX Service Manual page 25

A
Check the LCDI
(the power supply cord)
Exhaust water from the lower outlet.
All of them.
Open the panels, and check the power cord output voltage.
Check the voltage between white wire at R-capasitor
and black wire at main relay(IN) on PWB.
The voltage is under 100V
115V (over 100V)
Check the operation of
the product.
Any LED does not turn on
Check the PWB
(the control board)
The fuse on PWB is short.
The fuse was open.
short
Check the voltage.
The voltage 14V and -12V don't output.
proper output
The voltage -5V doesn't output.
proper output
Check the operation of
the product.
Any LED does not turn on
Complete the checking
under 100V
Push the reset button on the LCDI.
Check the output voltage between white and black wires.
115V(over 100V)
Remove the power supply cord from the product.
Check the power supply cord with LCDI only.
Refer to the page(6-1).
OK
you must check the insulation
resistance of compressor. Check the leak current
NG(under 10M )
Measure the insulation
resistance of compressor.
OK(over 10M )
NG(under 10M )
Measure the insulation
resistance of indoor fan motor.
OK(over 10M )
NG(under 10M )
Measure the insulation
resistance of outdoor fan motor.
OK(over 10M )
Can the Compressor operate ? can't operate
can operate
YES Check the diagnostic program.
Some LED turn on.
Refer to the page(4-4).
Change the fuse on PWB.
And check the cause of over current.
Check the operation of
the product.
Any LED does not turn on
EX. Transformer secondary voltage14V, -12V and -5V.
improper output
Check the conduction between 1pin and 6pin of BCN3.
(short or open)
proper output(-5V)
Repair the connection of BCN3 and their
lead wires and the connected limit SW.
YES
Some LED turn on.
under 100V
NG
Change the power supply cord with LCDI
Change the compressor.
Change the indoor fan motor.
Change the outdoor fan motor.
Change the compressor.
YES
Some LED turn on.
open
Check the diagnostic program.
Refer to the page(4-4).
5 – 2
CVP09LX
Set the product
Check the diagnostic program.
Refer to the page(4-4).
Change the PWB ass'y.
short