Sharp CV-P09LX Service Manual page 26

CVP09LX
No cooling
(Fan operate but the
compressor doesn't operate.)
Measure the power
supply voltage at
receptacle.
120V(over 100V)
Is it sufficient current
capacity of power
equipment ?
Is it small wiring for power
supply equipment ?
sufficient
Measure the current in
compressor circuit.
current
Check the
overload relay.
OK
Check the
running capacitor.
OK
Measure the resistance
of compressor coil.
OK
Is there high heat
source near the unit.
there isn't
Is the indoor
temperature too high ?
under 43ºC
Check the outdoor heat
exchanger.
not dirty
Can the compressor
operate ?
can operate
Checking complete.
under 100V
Ask the power supply
company for check.
insufficient
Ask the power supply
company for check.
no current
imperfect contact
Change the
overload relay.
NG
Change the running
capacitor.
NG
Change the compressor.
there is
Remove the high heat
source or stop.
over 43ºC
Avoid sun light and
ventilate well for outdoor
heat exchanger.
dirty
Clean them with steam
cleaner or another method.
can't operate
Change the compressor.
5 – 3
open
Check the
overload relay.
Change the
short
overload relay.
disconnecting
Is the connector
disconnecting ?
connecting Connect properly.
NG
Check the compressor
relay.(RY1 on PWB)
OK
Change PWB ass'y.
NG
Check the thermistor.
OK Change the thermistor.
Checking method for the compressor relay.
(RY1 on PWB)
Turn off the
power supply.
Measure the NG
resistance of its coil.
OK(about +160Ω on board [20ºC])
Turn on the power
supplty as operating the
compressor.
Measure the NG
voltage to its coil.
OK(12V, DC)
OK NG