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Copleland scroll compressor failure

I have a heat pump system with a copeland scroll compressor. 1st copeland compresoor ran for 4 year and failed. My second copeland compressor just failed after 3 years. It's in a Goodman CPLT36 condensing unit. I've also lost my defrost timer circuit board and condensing fan.
I really don't use the ac part. Just the heatpump as the unit is installed on the coast.
I have good slope for oil return. System seems to be charged properly.
Any ideas as to why I keep lossing compressors?

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  • garyfikse Nov 02, 2008

    I do not know if it matters or not. The issue with both compressors is a short in the winding. Do you still think I would have burnout residue in the refrigerant. Last time I replaced the compressor, I pulled a vacuum for 24 hours.

    Is that adequate or should I pull longer.

    I also installed a new moisture seperator and will again this time.

    I already have the compressor so I won't be changing to 410A this go.

    Any other advice?

  • Jay Cromp
    Jay Cromp May 20, 2014

    If you had a burnout the residual oil in the system will eat away at the insulation of the windings, causing premature failure. You will need to check the ph of your oil.

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I have scroll chiller contains scroll compressor tandom circuit. One of the compressor failure from it due to unbalance of the winding. Previously compressor thermistor opens two to three times. Also one phase open in contactor of the compressor. Can you guide me regarding the reason of compressor failure and what is the next step for the replacement of compressor. Also give guide line for the points take care.

Posted on Mar 27, 2010

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Garyfiskse only possible things i can think of is that your unit have dirty coil or improper size of run capacitor

Posted on Oct 14, 2011

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Make sure ALL moisture and noncondensables are evacuated while the system is down.I would have the line flushed to remove all remnants of burnout.Actually with the age of the unit and amount that needs repaired I would change the unit out to a 410a system and start over.

Posted on Nov 02, 2008

  • Dave Dobransky Nov 03, 2008

    I would treat it as a burnout as a precautionary measure.The length of time you pull a vac isnt really relevant.How deep of a vac did you pull in micron?I like it to be able to hold 300 for 10 minutes.Besides that....looks like you're on the right track....goodluck!

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