YCJF - Outdoor Fan Not Running

Air Conditioner: YCJF

Re: Outdoor Fan Not Running

The compressor operates on a call for cooling but the outdoor fan motor does not operate.

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