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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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More questions about checking starting caps
Well, this morning the phase converter won't start at all. There is
a button that can be pressed that energizes the contactor that connects the 10 starting caps to the motor. This button bypasses the time delay relay that energizes the contactor. Pressing the button has no effect at all, the motor just hums. I don't know yet if the contactor is pulling in or not because I cannot see into the electrics enclosure while throwing the breaker that turns on the phase converter. Even though I can press the bypass button while throwing the breaker I cannot see the contactor. I'll have to get another set of eyes to look inside while I turn the converter on. Getting on subject, I have a DVM that has a capacitance measuring function. Measuring half a dozen known good oil filled caps the readings on the meter match very closely, within one MFD, the value printed on the caps. If I measure the caps in the phase converter and they measure close to the value printed on the case does this mean the caps are probably good? Is there another test I can perform with the meter? And since there are 10 starting caps connected in parallel could just one or two bad caps cause the starting problem? Thanks, Eric |
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