Original message
| CertifiedHandy
|  "neutral reverse"
, posted Sat 17 May 10:01  
I have two residential AHUs side by side supplying one condenser in a lite commercial application. I recently replaced a burnedout fan motor in one of the AHUs. I used 3/4 HP 115V replacement. The condenser unit fired-up, hesitated and began working. I went back inside to check the fan and the board was flashing "neutral reverse" . All power comes from the first unit. It's almost as if the second unit is a dummy unit or a fan only unit. The door switch was shorted before I changed anything. Could the board have already been fried before I began repairs? Or did I somehow rewire incorrectly. I was only told to change the fan out. I noticed the fan door switch shorted wire and reported it but did not expect the board as I was given specific directions what the problem was. I need a solution before monday. Feeling trapped.
CertifiedHandy
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Replies:
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| pwned
| "Re(1):neutral reverse" , posted Sat 17 May 10:26
Unlike 230v, which uses two hot legs, 115v is obtained between neutral and hot.
You probably have the neutral and hot reversed of incoming power source reversed, which is a safety issue.
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| | learner
| "Re(2):neutral reverse" , posted Sat 17 May 11:16
Hmmm,
His id. looks funny. "Certifiedhandy" Wonder who certified him?
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| | CertifiedHandy
| "Re(3):neutral reverse" , posted Sat 17 May 21:43:
Thanks Learner. Excellent reply.
CertifiedHandy
[this message was edited by CertifiedHandy on Sat 17 May 21:48] |
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