Lennox Mini-Split Service Manual / Page 223
F5 Flow Chart
Outdoor fan speed malfunction
Power off, then restart the unit 3 minutes
later. Is it still displaying the error code?
Yes
Shut off the power supply, and inspect all
components for damage. Rotate the fan
by hand, the Fan should offer little resis-
tance when manually spun. Wheel and
shaft should spin evenly and balanced.
Yes
Check all wiring connections.
Yes
Check main PCB, see index 1.
The unit operates normally.
No
Yes
Replace the fan motor.
Make necessary corrections
No
Correct faulty corrections.
No
Replace the main PCB.
No
No
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