Service manual

19
AF-R100CX
AF-R120CX
TROUBLESHOOTING GUIDE
No cooling
(Operation not at all.)
Measure the power supply
voltage at receptacle.
Is it sufficient current capacity
of power equipment ?
Is it small wiring for power
supply equipment ?
Is plug disconnecting ?
insufficient
sufficient
connecting
OK
OK
open
imperfect contact
disconnecting
OK(12V, DC)
OK(5V, DC)
NO
YES
NG
NG
not open.
Check the power supply cord.
Check the fuse on PWB ass'y.
Measure the secondary
voltage of transformer.
Measure the voltage between
-12V and GND on PWB ass'y.
Measure the voltage between
-5V and GND on PWB ass'y.
If unit operate, dose the house
fuse or the circuit breaker open ?
Checking complete.
120V(over 100V)
NG(under 10MΩ)
OK(over 10MΩ)
NG(under 10MΩ)
OK(over 10MΩ)
can operate
can't operate
under 100V
open
proper
not proper
The house fuse or circuit
breaker open ?
Is it proper current capacity of the
house fuse or the circuit breaker ?
Ask the power supply
company for check.
Change the house fuse and
the circuit breaker turn on.
Ask the power supply
company for check.
Connect plug properly.
Change the power supply cord.
Change the fuse on PWB ass'y.
Change PWB ass'y.
Measure the insulation
resistance of compressor.
Measure the insulation
resistance of fan motor.
Can the Compressor operate ?
Change the compressor.
Change the fan motor.
Change the compressor.
over 14V(AC)
under 14V(AC)