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Outdoor Fan Motor
The outdoor fan motor is a thermally-protected
motor, mounted in the center of a metal bracket.
The metal bracket is mounted on the fan shroud and
chassis. An 8-mm hex nut attaches the fan blade to
the motor shaft. Four Phillips-head screws hold the
fan motor to the mounting bracket.
Bracket Mount to Base Pan (2 Screws)
Fan Shroud
Fan Motor
(Continued next page)
2. Test DC motor voltage output from drive board
(1.4x AC input)
a. No DC voltage - check FU102 - open, check
both motor resistances red to black
b. Shorted red to black - replace FU102 and
shorted motor
c. FU102 OK - replace drive board
3. Single motor not operating
a. Substitute new motor to the fan connector
on the drive board
b. Fan motor operates - replace defective fan
motor
c. No operation - replace drive board
4. Single motor short cycles (30 seconds ON - 60
seconds OFF)
a. Substitute new motor to the fan connector
on the drive board
b. Fan motor operates - replace defective fan
motor
c. Same operation - replace drive board
5. Both fans short cycle
a. Replace drive board
Caution:
• To prevent motor controller damage, power
must be off for 2 minutes before disconnecting
or reconnecting the fan connector CN102.
• Possible damage to the motor controller may
occur if voltage checks are made on any of the
other motor wires, blue, yellow, and orange.
• Connectors CN103 and CN102 cannot be
reversed for testing purposes.
To remove the outdoor fan motor and shroud:
1. Remove the room cabinet. (See
Room Cabinet.
)
Remove the chassis from the case.
2. Remove the 2 Phillips-head screws that attach
the control panel to the air conditioner. (See
Control Assembly
.)
No fan operation
1. Perform logic test to determine if the main
board is sending out a fan “ON” signal.
a. Measure voltage between JP44 and JP46.
Outdoor Fan “On” signal should read
between 2.1 and 2.4 VDC.
JP44
JP46
