Troubleshooting Guide - Sharp AF-R100CX Service Manual

No cooling
(Operation not at all.)
Measure the power supply
under 100V
voltage at receptacle.
120V(over 100V)
insufficient
Is it sufficient current capacity
of power equipment ?
Is it small wiring for power
supply equipment ?
sufficient
Is plug disconnecting ?
disconnecting
connecting
Check the power supply cord.
imperfect contact
OK
Check the fuse on PWB ass'y. open
OK
under 14V(AC)
Measure the secondary
voltage of transformer.
over 14V(AC)
Measure the voltage between NG
-12V and GND on PWB ass'y.
OK(12V, DC)
Measure the voltage between
NG
-5V and GND on PWB ass'y.
OK(5V, DC)
YES
If unit operate, dose the house
fuse or the circuit breaker open ?
NO
Checking complete.

TROUBLESHOOTING GUIDE

The house fuse or circuit not open.
breaker open ?
open
Is it proper current capacity of the
house fuse or the circuit breaker ?
proper
not proper
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.
NG(under 10MΩ)
Measure the insulation
resistance of compressor.
OK(over 10MΩ)
NG(under 10MΩ)
Measure the insulation
resistance of fan motor.
OK(over 10MΩ)
Can the Compressor operate ? can't operate
can operate
19
Ask the power supply
company for check.
Change the compressor.
Change the fan motor.
Change the compressor.
AF-R100CX
AF-R120CX