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Join Date: Dec 2007
Location: Calgary
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Carrier has a 4 year warranty on compressors for their commercial RTU product.

It is possible that the system had lost refrigerant.
R410 is a zeotropic blend. It will fractionate when leaking or if you try to vapour charge from the cylinder.
Simply put, you don't know what part of the blend leaked out first (smallest molecule) and if you vapour charge, you don't know what part of the blend you are installing. This will result in goofy things happening as far as the pressure temperature relationship of the saturated refrigerant.
The short cycling could have been due to the temperature of the compressor cutting out on high temperature protection, high amps, high discharge pressure if the switch is auto resetting.
Information at hand is a bit short to diagnose but hope this helps.

Edit:
Example of Carrier Warranty for RTU products.
https://dms.hvacpartners.com/docs/1009/public/0c/49004dp70.pdf
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Old 09-12-2019, 05:58 AM
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