Sharp AF-05CML Service Manual - Page 14

AF-05CML Symptom Fan motor runs but compressor doesn't operate Check 1) No current runs. (Compressor circuit) Defect 1) Slector switch defective 2) Thermostat defective 3) Overload relay defective 4) Compressor coil burnt out 5) Wiring disconnected or burnt out 2) Current runs. (Below operating current, capacitor normal) 1) Compressor (main winding) burn out 2) Switch contact defective 3) High current draw 1) Compressor locked 2) Compressor (Auxiliary winding) burn out 3) Overload relay contact burn out 4) Capacitor defective Compressor trys to start 5) Compressor winding short 4) High current draw compressor operates but stops immediately 1) Compressor winding short 2) Heat source near to air conditioner 3) Partial restriction in sealed system 1) Check power source voltage, 1) Power source voltage too start voltage drop low 2) Wiring for power supply equipment too small With switch set for cooling, 1) Check power line fuse or fuse or circuit breaker circuit breaker open 2) Check power source voltage 3) Check compressor 1) Insufficient capacity of fuse 2) Circuit breaker "OFF" Power source cut off or contact defective 1) Compressor locked 2) One connection terminal of compressor burn out 3) One core of lead wire of compressor burn out 4) Insulation test on compressor Insulation defective 5) Insulation test on switch Insulation defective Fan motor doesn't operate 1) Check select switch or micro with "Selector switch" set switch contact at "Fan only" 1) Switch contact burn out 2) Switch contact defective 3) Switch cam defective 2) Check a. Fan capacitor b. Power cord c. Fan motor 4) Wiring to terminal defective or improper 1) Fan capacitor defective 2) Power supply voltage is too low 3) Fan motor defective 3) Check 1) Fan motor bearing locked a. Current exceeds rated one 2) Fan motor lead wire burn out b. Motor lead wire Remedy 1) Change switch 1) Change thermostat 2) Change overload relay 3) Change compressor 4) Connect or change wiring 1) Change compressor 2) Change switch 1) Change compressor 2) Change compressor 3) Change overload relay 4) Change capacitor 5) Change compressor 1) Change compressor 2) Remove heat source 3) Check sealed system 1) Improve the power supply equipment 2) Improve the power supply equipment 1) Change to rated fuse 2) Circuit breaker "ON" Repair 1) Change compressor 2) Solder 3) Change lead wire Change compressor Change switch 1) Change switch 2) Polish contact 3) Change switch 4) Change or correct wiring 1) Change capacitor 2) Improve power supply equipment 3) Change fan motor 1) Change motor 2) Change or repair lead wire 14