Troubleshooting Guide
COMPLAINT | CAUSE | REMEDY | |
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Fan motor will not run. | No power | Check voltage at outlet. Correct if none. | |
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| Power supply cord | Check voltage to Control Box. If none, check power | |
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| supply cord. Replace cord if circuit is open. | |
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| Wire disconnected or con- | Connect wire. Refer to wiring diagram for terminal | |
| nection loose | identification. Repair or replace loose terminal. | |
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| Capacitor (Discharge | Test capacitor. | |
| capacitor before testing.) | Replace if not within ±10% of manufacturer's rating. | |
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| Replace if shorted, open, or damaged. | |
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| Will not rotate | Fan blade hitting shroud or blower wheel hitting | |
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| scroll. Realign assembly. | |
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| Units using slinger ring for condenser fan must have | |
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| 1/4 to 5/16 inch clearance to the base. If it hits the | |
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| base, shim up the bottom of the fan motor with | |
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| mounting screw(s). | |
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| Check fan motor bearings; if motor shaft will not | |
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| rotate, replace the motor. | |
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Fan motor runs | Revolves on overload. | Check voltage. If not within limits, call an electrician. | |
intermittently |
| Test capacitor. | |
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| Check bearings. Does the fan blade rotate freely? | |
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| If not, replace fan motor. | |
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| Pay attention to any change from high speed to | |
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| low speed. If the speed does not change, replace the | |
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| motor. | |
Fan motor noise. | Fan | If cracked, out of balance, or partially missing, | |
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| replace it. | |
| Turbo | If cracked, out of balance, or partially missing, | |
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| replace it. | |
| Loose clamper | Tighten it. | |
| Worn bearings | If knocking sounds continue when running or loose, | |
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| replace the motor. If the motor hums or noise | |
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| appears to be internal while running, replace motor. | |
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Compressor will not run, | Voltage | Check voltage. | |
but fan motor runs. |
| If not within limits, call an electrician. | |
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| Wiring | Check the wire connections, if loose, repair or | |
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| replace the terminal. If wires are off, refer to wiring | |
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| diagram for identification, and replace. Check wire | |
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| locations. If not per wiring diagram, correct. | |
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34Room Air Conditioner
