If that comp had mineral oil and you put r401 without changing to alky oil I bet comp seizing up.
As a last ditch effort you might try some Supco 88, sometimes it works sometimes not.
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If that comp had mineral oil and you put r401 without changing to alky oil I bet comp seizing up.
As a last ditch effort you might try some Supco 88, sometimes it works sometimes not.
I would say oil logged or the oil got washed out of the compressor. I use 409 for 12 systems and have zero problems.
Yea I agree.
Sometimes you can add a little AB lubricant and it will help bring oil back
Sounds like its possibly been overcharged .I would ignore sight glass and charge system measuring subcooling off condenser and superheat off cooling coil
Curious if you resolved the problem...