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Old 04-29-2012, 03:54 PM   #16
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HVAC Condenser FAN Motor hum and won;t start


I am afraid of reversing wire at Cap to avoid damage to Motor. I will wait for Carmon to verify at shop then will attempt.

I was thinking to reverse fan blade as a last resort.

Thanks !

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Old 04-29-2012, 03:56 PM   #17
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HVAC Condenser FAN Motor hum and won;t start


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Originally Posted by bcjoshi View Post
I am afraid of reversing wire at Cap to avoid damage to Motor. I will wait for Carmon to verify at shop then will attempt.

I was thinking to reverse fan blade as a last resort.

Thanks !
You would have to get a different fan blade, can't just put the fan blade on upside down.
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Old 04-29-2012, 04:14 PM   #18
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HVAC Condenser FAN Motor hum and won;t start


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Reverse the blue and brown wires from the motor that attach to the capacitor. It will run the opposite direction then.

that is totally true. We were in hvac class and one of our senior student was explaining that to us. He experienced it on motor change out also. loll

Also you know Beenthere has almost close to 14,000 post , right? I think he damn sure knows what he is talking about! loll
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Old 04-29-2012, 04:27 PM   #19
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HVAC Condenser FAN Motor hum and won;t start


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Originally Posted by kilosos2 View Post
that is totally true. We were in hvac class and one of our senior student was explaining that to us. He experienced it on motor change out also. loll

Also you know Beenthere has almost close to 14,000 post , right? I think he damn sure knows what he is talking about! loll
I was able to make one out of three motors reverse...amperage was the same with no load on it in both directions.... the other two ran only one way....all three motors although different manufactures were 3 wire psc motors... now I am really confused... Been could have 2 million posts... what does number of posts mean.... I will however say from reading lots of his posts he knows his stuff... try what he said it may work...
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Old 04-29-2012, 04:31 PM   #20
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HVAC Condenser FAN Motor hum and won;t start


Never had a 3 wire PSC I couldn't change rotation on.
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Old 04-29-2012, 04:38 PM   #21
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HVAC Condenser FAN Motor hum and won;t start


I just had 2 not change.... I dont get it... I have never even tried before as all non oem motors we buy here are reversable by switching external plug....they are not three wire.. they have 2 seperate wires for cap ... I am not sure whats happening.... I do however hope your suggestion works...
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Old 04-29-2012, 04:49 PM   #22
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HVAC Condenser FAN Motor hum and won;t start


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Originally Posted by carmon View Post
I just had 2 not change.... I dont get it... I have never even tried before as all non oem motors we buy here are reversable by switching external plug....they are not three wire.. they have 2 seperate wires for cap ... I am not sure whats happening.... I do however hope your suggestion works...
The motors you are talking about. The rotation change leads, do exactly what I said to do, on a 3 wire motor. they switch which winding gets the phase change. Its just that you doing it with external leads that only connect to themselves.
Remember, the brown with white stripe capacitor lead, connects to the same spot as the common lead.


I think the Fasco motor facts has info on it.
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Old 04-29-2012, 04:53 PM   #23
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HVAC Condenser FAN Motor hum and won;t start


I understand what your saying... I am going crazy trying to figure out why 2 brands didnt reverse... I even tried it a second time just for fun... the same result only one changed direction..... internet here I come...lol
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Old 04-29-2012, 05:15 PM   #24
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HVAC Condenser FAN Motor hum and won;t start


BIG THANK YOU to all !!!
I just reversed as "beenthere" advised and it is working in right direction now.
This was big help, very much appreciated.

I wonder why Motor manufacturer sell Single Phase 3 wire PSC motors having CWISE and CCWISE direction. They could simply advise 2 wiring for different direction as recommended by "beenthere".
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Old 04-29-2012, 05:19 PM   #25
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HVAC Condenser FAN Motor hum and won;t start


not sure.. glad its working..... thanks to been there.. I am still stumped... oh well does not take much these days getting old...
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Old 04-29-2012, 05:46 PM   #26
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HVAC Condenser FAN Motor hum and won;t start


They sell more motors by not putting on a wiring diagram of how to reverse rotation on those motors.
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Old 04-29-2012, 06:03 PM   #27
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HVAC Condenser FAN Motor hum and won;t start


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Originally Posted by carmon View Post
I was able to make one out of three motors reverse...amperage was the same with no load on it in both directions.... the other two ran only one way....all three motors although different manufactures were 3 wire psc motors... now I am really confused... Been could have 2 million posts... what does number of posts mean.... I will however say from reading lots of his posts he knows his stuff... try what he said it may work...
Carmon , I was saying the posting thing to the OP. lol sorry if that one rubbed off in the wrong way. LOL
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Old 04-29-2012, 06:10 PM   #28
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HVAC Condenser FAN Motor hum and won;t start


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Carmon , I was saying the posting thing to the OP. lol sorry if that one rubbed off in the wrong way. LOL
you did not rub me the wrong way.... i understand why you posted that.... glad been fixed it for the op ..
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Old 04-29-2012, 09:15 PM   #29
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HVAC Condenser FAN Motor hum and won;t start


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They sell more motors by not putting on a wiring diagram of how to reverse rotation on those motors.
I tend to agree with you on this logic.

Another interesting fact - Companies like Johnstone and C C Dickson don't even sell motor to me unless I am certified electrician. Only Grianger was ready to sell parts to me. I can understand not selling Freon gas but not selling capacitor or motor was odd
.

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