Posted by TimnVa on June 17, 2014 at 15:46:04 from (64.50.251.69):
In Reply to: RE: 3 phase question posted by the mick on June 17, 2014 at 13:01:24:
Does this a/c unit have a phase monitor factory installed that is indicating unit is out of phase if so and you have switched two leads and it still shows out of phase then the phase monitor may be bad. If it does have a phase monitor have you tried bypassing it and see if unit will run and check rotation of compressor and condenser motor. If this unit has a helical screw compressor DO NOT try this but if it is a scroll compressor you can run it for a short period of time and check the pressures. If it does not show a differential pressure and is very noisey it is running backwards. Not knowing what unit you have it could have a single phase condenser fan and that would tell you also if it is reversed.
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