Sharp AF-S80CX Service Manual page 27

No cooling
(Fan operate but the
compressor doesn't operate.)
under 100V
Measure the power
supply voltage at
receptacle.
Ask the power supply
120V(over 100V) company for check.
insufficient
Is it sufficient current
capacity of power
equipment ?
Ask the power supply
Is it small wiring for power
company for check.
supply equipment ?
sufficient
no current
Measure the current in
compressor circuit.
current
imperfect contact
Check the
overload relay.
OK Change the
overload relay.
Check the NG
running capacitor.
Change the running
OK
capacitor.
Measure the resistance NG
of compressor coil.
OK Change the compressor.
there is
Is there high heat
source near the unit.
there isn't Remove the high heat
source or stop.
over 43˚C
Is the outdoor
temperature too high ?
under 43˚C
Avoid sun light and
ventilate well for outdoor
heat exchanger.
dirty
Check the outdoor heat
exchanger.
not dirty
Clean them with steam
cleaner or another method.
can't operate
Can the compressor
operate ?
can operate Change the compressor.
Checking complete.
open
Check the
overload relay.
Change the
short
overload relay.
disconnecting
Is the connector
disconnecting ?
connecting
Connect properly.
NG
Check the compressor
relay.(MRY on PWB)
OK Change PWB ass'y.
NG
Check the thermister.
OK Change the thermistor.
Checking method for the compressor relay.
(MRY on PWB)
Turn off the
power supply.
Measure the NG
resistance of its coil.
OK(160Ω at 20˚C)
Turn on the power
supplty as operating the
compressor.
Measure the NG
voltage to its coil.
OK(12V, DC)
OK
27
NG
AF-S80CX