– 20 –
Condenser Fan Motor
Screws
Fan Bracket
Fan Bracket
Screws
Wire Connector
Evaporator Fan
Condenser Fan
The condenser fan is a permanent-magnet, 4-
pole, DC motor that will operate at 3 speeds. Fan
speed (low, medium, high) corresponds with
compressor speed to minimize pressure
variations in the sealed system. The speed of the
fan is controlled by the voltage output from the
main control board. Voltage output from the
control board to the fan is 13.2 VDC; however to
regulate the speed of the fan, the main control
board uses pulse width modulation (PWM). When
operating, voltage is sent in pulses (much like a
duty cycle) as opposed to an uninterrupted flow.
This pulsing of 13.2 VDC produces effective
voltage being received at the motor, which is the
equivalent to a reduction in voltage. Fan speed will
be selected and maintained by the main control
board regulating the length and frequency of the
13.2 VDC pulse. .
To Remove the Fan
1. Extend the chassis (see Machine
Compartment in the Cabinet chapter).
2. Pull the blade off the motor shaft.
3. Cut the wire tie securing the fan wiring to the
fan bracket.
Caution:
Fan connector can be separated into 3
segments (center, left side, and right side).
Disconnect the fan connector at the center only.
4. Disconnect the fan connector.
5. Feed wiring through the hole in the fan shroud.
6. Remove 2 screws, top section of fan bracket,
and motor.
7. Disconnect the evaporator fan wiring
connector.
8. Remove 2 screws from the fan mounting
bracket and remove the fan.