Sharp AF-08CRL Service Manual - Page 26

AF-08CRL No cooling (Operation not at all.) TROUBLESHOOTING GUIDE Measure the power supply voltage at receptacle. under 100V 120V(over 100V) The house fuse or circuit breaker open ? not open. 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. Is it sufficient current capacity of power equipment ? Is it small wiring for power supply equipment ? sufficient insufficient Ask the power supply company for check. Is plug disconnecting ? disconnecting connecting Connect plug properly. Check the power supply cord. imperfect contact OK Change the power supply cord. Check the fuse on PWB ass'y. open OK Change the fuse on PWB ass'y. Measure the secondary voltage of transformer. under 14V(AC) 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) Change PWB ass'y. If unit operate, dose the house fuse or the circuit breaker open ? NO YES Measure the insulation resistance of compressor. NG(under 10MΩ) OK(over 10MΩ) Change the compressor. Measure the insulation resistance of fan motor. NG(under 10MΩ) OK(over 10MΩ) Change the fan motor. Can the Compressor operate ? can't operate can operate Change the compressor. Checking complete. 26