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Thread: frost on compressor
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12-03-2013, 08:11 AM #1
frost on compressor
HI,
I have a carrier primeline 69NT40-561 scroll compressor
compressor was covered with frost and pulled down temp at -15C only
supply temp and return temp sometimes equalizes
2 alarms flashes on the screen
alarm 67 and 66
anyone willing to share idea on this problem
thanks
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12-03-2013, 09:11 AM #2
Re: frost on compressor
If the compressor itself is "covered with frost" then you haven't got enough superheat, check super heat and adjust/replace TEV/EEV/metering device as neccessary.
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12-03-2013, 10:51 PM #3
Re: frost on compressor
I see that your areas humidity is between 45% to 80%, with a -15°C suction temperature you would expect some frosting on the cold surfaces.
Brian - Newton Abbot, Devon, UK
Retired March 2015
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13-05-2013, 09:59 AM #4
Re: frost on compressor
Even -15 degree C suction temperature indicates that there is a chance of liquid refrfigerent being sucked in... Better check the load and refrigerent superheat, else you will end up killing the compressor.
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13-05-2013, 11:55 AM #5
Re: frost on compressor
Air flow across evaporator? No load on a system will result in low superheat and possible frosting on compressor body.
Mostly found in Oxfordshire, UK :)
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13-05-2013, 05:58 PM #6
Re: frost on compressor
Frosting on the compressor can also be caused by over charged with refrigerant.