capacitor sizeing


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Old 06-08-08, 03:12 PM
W
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capacitor sizeing

Hey guys. I'm here in Las Vegas and guess what? yep. The scroll compressor hung on starting. Checked the relay contactor and the points looked burnt. Went to 2 different supply houses and only found one. A 2 pole instead of 1 and no jumper bar.
Hooked it up with a jumper wire added and it ran for a while OK. Then the pump sounded stressed again. This time I removed the jumper wire and moved the #1 lead directly to the same side as #1 & #2 taps. I noticed that the capacitor had a small burn mark on a lead. Its got a plastic housing so I could see about 1" of oil in the bottom of it. It's 2 1/2" dia by 3 3/4" long with 3 terminals. Question is: How do I match it ? Could this be causing the compressor motor to sound like it's not getting enough juice but still run? Any help is greatly appreciated. Thanks.
 
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Old 06-09-08, 12:54 PM
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Replace the capacitor there should be markings on the outside like 35-5 370volts or maybe 30-7.5 440volts etc you can use a 35-5 440volts in place of a 35-5 370volts the higher voltage is ok but you must match the micorfarad ratings for your unit to function correctly. Do not use a 370volt capacitor in place of a 440volt one it will not hold up
 
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Old 06-09-08, 03:21 PM
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westnlas

I took the capacitor to 3 different supply houses, they couldn't tell me the size. One did check it and said it was OK but a contact looked risky. Anyway, got the size finally after an extensive web search of the unit. I don't think that's the problem though. Scroll pump starts, runs a bit then starts making an awful rattling sound. If I leave it alone, it will kick back in sometimes. Other times it sounds hung up. I can call a service tech out, but I would really like to get a handle on the problem first. The guys here in Las Vegas are a bit "iffy" if you get my drift. Thanks for your earlier reply.
 
 

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