Sharp AF-08CRL Service Manual - Page 27

No cooling (Fan operate but the compressor doesn't operate.) Measure the power under 100V supply voltage at receptacle. Ask the power supply 120V(over 100V) company for check. Is it sufficient current insufficient capacity of power equipment ? Is it small wiring for power supply equipment ? Ask the power supply company for check. sufficient Measure the current in compressor circuit. current Check the overload relay. OK no current imperfect contact Change the overload relay. Check the running capacitor. OK NG Change the running capacitor. Check the overload relay. short open Change the overload relay. Is the connector disconnecting ? disconnecting connecting Connect properly. Check the compressor NG relay.(MRY on PWB) OK Change PWB ass'y. Check the thermister. NG OK Change the thermistor. Measure the resistance NG of compressor coil. OK Change the compressor. Is there high heat source near the unit. there isn't there is Remove the high heat source or stop. Is the outdoor over 43˚C temperature too high ? under 43˚C Avoid sun light and ventilate well for outdoor heat exchanger. Check the outdoor heat exchanger. not dirty dirty Clean them with steam cleaner or another method. Can the compressor operate ? can't operate can operate Change the compressor. Checking method for the compressor relay. (MRY on PWB) Turn off the power supply. Measure the NG resistance of its coil. OK(160Ω at 20˚C) Turn on the power supplty as operating the compressor. Measure the NG voltage to its coil. OK(12V, DC) OK NG Checking complete. 27 AF-08CRL