Troubleshooting Guide
Room Air
Conditioner Voltage
Limits
| NAME PLATE RATING |
| MINIMUM |
| MAXIMUM | ||
| 208~230±10% |
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| 187V |
| 253V | |
| 115±10% |
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| 104V |
| 126V | |
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| COMPLAINT | CAUSE |
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| REMEDY | ||
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| Fan motor will not run. | No power |
| Check voltage at outlet. Correct if necessary. | |||
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| Power supply cord |
| Check voltage to rotary switch. If none, check power | |||
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| supply cord. Replace cord if circuit is open. | ||
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| Rotary switch |
| Check switch continuity. Refer to wiring diagram for | |||
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| terminal identification. Replace switch if defective. | ||
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| Wire disconnected or con- | Connect wire. Refer to wiring diagram for terminal | ||||
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| nection loose |
| identification. Repair or replace loose terminal. | |||
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| Capacitor (Discharge |
| Test capacitor. |
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| 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 |
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| 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. |
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| Fan motor noise. | Fan |
| If cracked, out of balance, or partially missing, | |||
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| replace it. |
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| Turbo |
| If cracked, out of balance, or partially missing, | |||
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| replace it. |
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| Loose clamper |
| Tighten it. |
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| 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. |
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| but fan motor runs. |
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| 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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| Rotary |
| Check for continuity, refer to the wiring diagram for | |||
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| terminal identification. Replace the switch if circuit is | ||
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| open. |
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Service Manual 32
