Air Conditioner: YCJF
Re: Outdoor Fan Not Running
The compressor operates on a call for cooling but the outdoor fan motor does not operate.
| Qty |
Possible Causes: |
| 4 |
Bad Condenser Motor |
| 2 |
Bad Fan Capacitor |
|
Bad Fan-Cycling Switch |
CHECKOUT:
1. Check Motor
- Disconnect power to the outdoor unit by pulling the service disconnect or by turning the breaker off.
- Check the motor bearings by spinning the fan blade.
- Fan Blade Tight / Won't Turn = Bad Condenser Fan Motor
2. Check Capacitor
- Disconnect power to the outdoor unit by pulling the service disconnect or by turning the breaker off.
- Remove the wires from the fan capacitor & check capacitance.
- Capacitor Reading < 80% of Rating = Bad Capacitor
3. Check for Fan-Cycle Switch
- Look for a fan-cycling pressure switch or temperature control installed on the unit.
- No Switch or Control --> Step 4. Check Operation
- Switch or Control Installed
- Hook-Up Refrigerant Gauges
- Energize a call for cooling from the thermostat.
- Monitor system head pressure as the compressor operates.
- Fan should start at approx. 400 psig.
- Fan Doesn't Start
- Disconnect power to the outdoor unit by pulling the service disconnect or by turning the breaker off.
- Temporarily bypass the Fan-Cycling control.
- Re-apply power to the unit.
- No Fan --> Step 4. Check Operation
- Fan = Bad Fan-Cycling Switch
4. Check Operation
- Energize a call for cooling from the thermostat.
- Ensure that the contactor on the outdoor energizes.
- Fan Starts --> Check Fan Motor amperage and compare to nameplate rating.
- Fan Doesn't Start --> Check for 230VAC between the Black and Red wire of the fan plug.
- Voltage + No Fan --> Check Motor Temperature
- Voltage + No Fan + Hot Motor --> Allow motor to cool then recheck/
- Voltage + No Fan + Cool Motor = Bad Condenser Fan Motor