33
PTEC-M-1A
Component
Tests
WARNING!
To avoid possible electrical shock,
personal injury or death, disconnect
the power before servicing.
Overloads
1. With no power to the unit, remove
the overload lead from the
compressor terminal.
2. Using an ohmmeter: Test
continuity between terminals of
the overload. If not continuous,
the overload is open, replace the
overload.
Compressor Windings
WARNING!
To prevent death, personal injury or
property damage due to electrical
shock, do not connect electrical
power to this unit or to the
compressor if the compressor
terminal cover has been removed or
is not firmly in place.
If the test indicates shorted,
grounded or open windings, see
procedure for the next steps to be
taken.
Resistance Test
1. With no power, remove the leads
from the compressor terminals.
2. Touch the leads of an ohmmeter
to terminals C-S, start windings
and C-R, run winding.
If either winding does not test
continuous, replace the compressor.
Capacitance Check
Using a hookup as shown below,
take the amperage and voltage
readings and use them in the
formula:
WARNING!
Line voltage now present.
Testing Capacitance
Capacitance (MFD) =
2650 X Amperage
Voltage
If the value obtained is not within
10% of the rating printed on the
capacitor, replace.
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