COMPLAINT | CAUSE | REMEDY |
|
|
|
Fan motor will not run. | No power | Check voltage at outlet. Correct if none. |
|
|
|
| Power supply cord | Check voltage to rotary switch. If none, check |
|
| power supply cord. Replace cord if circuit is open. |
|
|
|
| Rotary switch | Check switch continuity. Refer to wiring diagram |
|
| for terminal identification. Replace switch if |
|
| defective. |
|
|
|
| Wire disconnected or | Connect wire. Refer to wiring diagram for terminal |
| connection loose | identification. Repair or replace loose terminal. |
|
|
|
| Capacitor (Discharge | Test capacitor. |
| capacitor before testing.) | Replace if not within ±10% of manufacturer's |
|
| rating. Replace if shorted, open, or damaged. |
|
|
|
| Will not rotate | Fan blade hitting shroud or blower wheel hitting |
|
| scroll. Realign assembly. |
|
| Units using slinger ring condenser fans must |
|
| have 1/4 to 5/16 inch clearance to the base. If it is |
|
| hitting the base, shim up the bottom of the fan |
|
| motor with mounting screw(s). |
|
| Check fan motor bearings; if motor shaft will not |
|
| rotate, replace the motor. |
|
|
|
Fan motor runs | Revolves on overload. | Check voltage. See limits on page 18. If not within |
intermittently |
| limits, call an electrician. |
|
| Test capacitor. |
|
| Check bearings. Does the fan blade rotate freely? |
|
| If not, replace fan motor. |
|
| Pay attention to any change from high speed to |
|
| low speed. If the speed does not change, replace |
|
| the motor. |
|
|
|
Fan motor noise. | Grommets | Check grommets; if worn or missing, replace them. |
|
|
|
| Fan Blade | If cracked, out of balance, or partially missing, |
|
| replace it. |
|
|
|
| Turbo fan | If cracked, out of balance, or partially missing, |
|
| replace it. |
|
|
|
| Loose set screw | Tighten it. |
|
|
|
| Worn bearings | If knocking sounds continue when running or |
|
| loose, replace the motor. If the motor hums or |
|
| noise appears to be internal while running, |
|
| replace motor. |
|
|
|
— 15—
