A LOOK AT SERVICE SAFETY
Servicing
83
V.
Checking for Adequate
Compressor Pumping
Before checking for adequate compressor pumping,
you should have already checked for compressor
electrical problems as outlined in “Identifying Com-
pressor Electrical Problems” starting on page 47.
To check for adequate pumping, connect service
gauges to system (add line taps if necessary). Then,
turn on power to system. If the system has an ade-
quate refrigeration charge, the compressor should
maintain at least 200 psig pressure difference
between suction and discharge. If the compressor
does not pump adequately, it must be replaced with
no further testing.
VI.
Is Your Compressor Eligible
for Return Under Warranty?
Authorized Tecumseh wholesalers are asked to test
every in-warranty compressor that is returned to
them. The Tecumseh factory tears down and exam-
ines a representative sample of compressors returned
by authorized wholesalers and notes the reason for
failure.
In the field, it can be determined if a compressor is
eligible for return under warranty by FIRST check-
ing for electrical problems and then, checking for
adequate compressor pumping. If the compressor
passes all electrical troubleshooting tests and pumps
adequately, the compressor is operating properly,
and the problem lies elsewhere in the system.
A. Check the Compressor for Electrical
Problems
Using the procedures in “Identifying Compressor
Electrical Problems” starting on page 47, check the
compressor for electrical problems.
B. Check for Adequate Compressor
Pumping
Connect service gauges to system (add line taps if
necessary). Turn on power to system. If the system
has an adequate refrigeration charge, the compressor
should maintain at least 200 psig pressure difference
between suction and discharge. If compressor does
not pump adequately, compressor must be replaced
with no further testing.
