Troubleshooting Guide - Sharp AFP80CX Service Manual

AF-P80CX
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 ?
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.
under 100V
120V(over 100V) The house fuse or circuit
breaker open ?
Is it proper current capacity of the
house fuse or the circuit breaker ?
Change the house fuse and
the circuit breaker turn on.
insufficient
Ask the power supply
company for check.
sufficient
disconnecting
Connect plug properly.
connecting
imperfect contact
OK
Change the power supply cord.
open
OK Change the fuse on PWB ass'y.
under 14V(AC)
over 14V(AC)
NG
OK(12V, DC)
NG
Change PWB ass'y.
OK(5V, DC)
YES
NO Measure the insulation
resistance of compressor.
Measure the insulation
resistance of fan motor.
Can the Compressor operate ?

TROUBLESHOOTING GUIDE

not open.
open
Ask the power supply
company for check.
NG(under 10MΩ)
Change the compressor.
OK(over 10MΩ)
NG(under 10MΩ)
OK(over 10MΩ)
Change the fan motor.
can't operate
can operate Change the compressor.
28