Sharp AF-05CML Service Manual - Page 15

AF-05CML Symptom Fan motor operates but supplies no air when "Selector switch" set at "Fan" Compressor starts but stops soon Check Defect 1) Check motor rotating direction Motor rotating wrong 1) Check air filter and fan elements 1) Dirty air filter 2) Fan screw or nut loose and only motor rotating Remedy Change motor 1) Clean 2) Tighten up 1) Measure power supply voltage 1) Voltage is low and over- 1) Improve the power supply current runs, overload relay or equipment internal thermostat operates 2) Check if air is delivered 2) Wiring for power supply equipment too small 1) Overload relay operates as fan is not rotating 2) Improve the power supply equipment 1) Change switch Check electric circuit (fan) 2) Overload relay operates as 2) Tighten up fan nut is loose 3) Check the temp. of air at condensor 1) Overload relay operates as outdoor air temp. is too high 1) Ventilate well for outdoor exchanger, avoid sun light, remove heat source from around outdoor unit 2) Improper ventilation for outdoor heat exchanger. Overload relay operates as the temp. of outdoor unit is too high 2) Clean the outdoor unit Improve ventilation for outlet port of outdoor exchanger 4) Rated current is normal but overload relay or internal thermostat cuts out Compressor operates 1) Check switch mechanism in cooling but fan doesn't 2) Check fan capacitor rotate 3) Check fan motor Noise 1) Vibrating noise 2) Metallic sound Overload relay defective Change overload relay Switch defective Capacitor defective Fan motor defective 1) Insulation unstable 2) Cabinet screw loose Piping touches cabinet or other parts Change switch Change capacitor Change motor 1) Secure 2) Tighten up Repair 3) Noise created by fan 1) Fan cracked or deformed 2) Screw or nut loose causing vibrating noise 1) Change fan 2) Secure Excessive vibration and noise 4) Check mounting of compressor Check noise source Compressor mounts defective Replace 1) Compressor 2) Electric parts 3) Piping touched 4) Cabinet or parts set-screws loosened 5) Fan touching 6) Insulation unstable 1) Change compressor 2) Repair or change 3) Repair 4) Tighten up 5) Adjust 6) Secure 15