Service manual

20
AF-R100CX
AF-R120CX
No cooling
(Fan operate but the
compressor doesn't operate.)
Ask the power supply
company for check.
Ask the power supply
company for check.
Change the
overload relay.
Connect properly.
Change PWB ass'y.
Change the thermistor.
NG
NG
NG
NG
NG
open
disconnecting
short
connecting
OK(12V, DC)
OK
OK
OK(160Ω at 20ûC)
NG
there is
there isn't
OK
OK
OK
current
no current
imperfect contact
insufficient
sufficient
120V(over 100V)
under 100V
NG
dirty
not dirty
can't operate
can operate
over 43ûC
Checking method for the compressor relay.
(MRY on PWB)
under 43ûC
Check the
running capacitor.
Change the
overload relay.
Change the running
capacitor.
Measure the current in
compressor circuit.
I s it sufficient current
capacity of power
equipment ?
Is it small wiring for power
supply equipment ?
Measure the power
supply voltage at
receptacle.
Check the
overload relay.
Check the
overload relay.
Is the connector
disconnecting ?
Check the compressor
relay.(MRY on PWB)
Check the thermister.
Measure the
resistance of its coil.
Turn on the power
supplty as operating the
compressor.
Turn off the
power supply.
Measure the
voltage to its coil.
OK
Measure the resistance
of compressor coil.
Is there high heat
source near the unit.
Is the outdoor
temperature too high ?
Check the outdoor heat
exchanger.
Can the compressor
operate ?
Checking complete.
Change the compressor.
Remove the high heat
source or stop.
Avoid sun light and
ventilate well for outdoor
heat exchanger.
Clean them with steam
cleaner or another method.
Change the compressor.