Carrier Model#38yda060300 compressor quits pumping.

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Old 12-16-13, 08:56 AM
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Carrier Model#38yda060300 compressor quits pumping.

I have a Carrier #38yda060300 5 ton heat pump that quits pumping when the outdoor temperature reaches around 45 degrees. It is set for heat mode. If the temperature outside is below freezing it works fine. But when the temperature outside rises then the fan on the airhandler starts running on high speed, the thermostat shows the unit running in "energy savings" mode. The compressor is still running but not pumping and the temperature in the house slowly falls.
There are no fault indications at the thermostat or on the control board in the heat pump. I have also tried to cycle the power on both units to get it to reset and work. No luck. Does anyone have an idea what may be the cause. I suspect a temperature sensor.
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Old 12-16-13, 07:01 PM
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Does the heat pump display low speed operation when this occurs?

I don't think that the 38YDA is a DIY project.
While it may be the contactor, I recommend calling a Carrier factory authorized dealer to service that unit.




 
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Old 12-19-13, 08:37 AM
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I figured it wasn't a DIY project. I am a master electrician (not HVAC guy). So I was hoping for some input that might lead me in the right direction. If it is electrical I can make the repair. If it is on the refrigeration side then I would call a pro in the area. If it is a control board or perhaps a temperature sensor then I am qualified to do that. Just not sure where to start looking. I have checked the contactor and it is functioning as it should.

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Old 12-19-13, 12:38 PM
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Post your amp draw in low speed and in high speed.
Post the compressor RLA listed on the unit nomenclature.
You should see 1 blink in low speed and 2 in hi speed.
 
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