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#14664 - 09/27/02 08:17 AM AC UNIT  
EVAD7  Offline
Member
Joined: Mar 2002
Posts: 37
MN
WE RECENTLY HOOKED-UP A CENTRAL AC UNIT FOR A CHURCH. IT REPLACED AN EXISTING UNIT. THE AMP DRAW WAS SIMILAR (35 AMPS AT 240 VOLT 1 PH). NOW A PROBLEM HAS DEVELOPED AT START UP, LIGHTS DIM. ANY SOLUTIONS?


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#14665 - 09/27/02 09:13 AM Re: AC UNIT  
Ron  Offline
Member
Joined: Mar 2002
Posts: 582
White Plains, NY
Verify all terminations are tight. Verify the unit is drawing the rated load. Verify conductors are rated properly. Then punt.


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#14666 - 09/27/02 12:26 PM Re: AC UNIT  
JPB  Offline
Junior Member
Joined: Sep 2002
Posts: 3
Westford MA USA
Maybe it has nothing to do with the new A/C.
Could be a coincidence.(Did I spell that right?)
Check for voltage drop at the main.


#14667 - 09/27/02 06:33 PM Re: AC UNIT  
frank  Offline
Member
Joined: May 2001
Posts: 374
windsor ontario canada
Id put on a clamp on with a hold feature to check the LRA on start up,check all lugs and terminations at both the unit and the panel.A slight dimming for a split second seems to be normal in some small services.Locked rotor on that unit can be 210 amps and last longer if the unit starts and stops within 5 minutes beacuse of the high head pressure and the time it takes for the compressor O/L to open if it does not start. good luck explaining this to the owner.Check\replace the compressor capacitor.Caps Can test as good and still fail under load a pretty cheap part to replace as well.

[This message has been edited by frank (edited 09-27-2002).]



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