York Millennium YK M3 M3 G4 THRU YK S6 S4 J2 - Manual (Page 57)

YORK INTERNATIONAL 57
FORM 160.49-O2
COMPRESSOR
ELECTRICAL CONTROLS
Maintenance for the compressor assembly consists of
checking the operation of the oil return system and
changing the dehydrator, checking and changing the
oil, checking and changing the oil filters, checking the
operation of the oil heater, checking the operation of
the oil pump, and observing the operation of the com-
pressor.
Internal wearing of compressor parts could be a seri-
ous problem caused by improper lubrication, brought
about by restricted oil lines, passages, or dirty oil fil-
ters. If the unit is shutting down on (HOT) High Oil
Temperature or Low Oil Pressure (OP), change the oil
filter element. Examine the oil filter element for the pres-
ence of aluminum particles. If aluminum particles are
noticeable and the same conditions continue to stop
the unit operation after a new filter element is installed,
notify the nearest YORK office to request the presence
of a YORK Service man.
For information covering the MicroComputer Control
Center operation, refer to “Section 2”.
The operating points of the pressure and temperature
cut outs are shown in the Wiring Diagrams. These
diagrams also contain a starting and stopping
sequence diagram.