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bigmoundone

HVAC Condenser fan motor wiring

BigMoUndone
11 years ago

I've searched the internet far and wide and have yet to come up with a final working answer. Now I turn to posting for myself!

It worked great until this week (TX summer!) so I did some research, a little troubleshooting, and figured out it was a broken motor. Replaced it along with a new cap (of appropriate specs). The old motor's 3 wires didn't match the new motor's 5 wires. (well, really it has 9 wires, but 4 connect to each other at the base of the motor for spin direction).

Old motor is a 3 wire (red, black, brown)

The power from the house is connected to the contactor in L1 (white) and L2 (black)

The control panel controls are attached appropriately.

The old set up (when I opened up the panel for the first time):

black from the motor to the black of the power in L2.

brown to dual cap fan

red to dual cap common and L2

I read diagram online and hooked everything up to the best of what I understood and the fan came on right away and worked all night. But a few hours into morning it slowed down enough I could watch the individual blades turn (quickly, but still could follow them). I followed all the wires, no breaks, and I reconnected everything a little more securely, so I don't think that's the problem. But now the fan doesn't come on at all.

So now I would like to know how to set up my new 5 wire fan to my new dual cap.

New motor is 5 wire (brown, brown/white, black, yellow, green/yellow)

The green is the ground and is currently attached to the body of the HVAC unit.

Thank you in advance for anyone with any thoughts/ideas/input!!

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