Revision Date
– 22/12/2014
page 28
Connect between terminals “T” and the lower
terminal “C” using a short length of wire as
shown.
NOTE: The connecting wire should be
terminated with either push-on
connectors or spring loaded clips
suitable for connection to the
terminals.
CAUTION: Make sure that there are no short
circuits between the terminals and
the connecting wire.
TEST PASS
– COMPRESSOR RUNS
With terminals “T” and lower “C” connected, the compressor should start running and the system
should start cooling. In this case, the control unit is functioning correctly on 12/24V DC.
The compressor control unit has now been eliminated as a possible fault.
The next step is to investigate a fault in the main circuit board, the control panel circuit board, the
thermistor or the wiring loom.
Before continuing, disconnect the fridge from the 12/24V DC power supply, remove the connecting
wire
and refit the push on connectors to terminals “T” and lower “C”.
NOTE: During this test, the compressor should draw approximately 3 amps.
NOTE: There may be a delay of up to 5 seconds between connection of terminals “T” & lower
“C” and the compressor starting.
TEST FAIL
– COMPRESSOR DOES NOT RUN
With terminals “T” and lower “C” connected, the compressor does not start. In this case, either the
compressor or the compressor control unit are likely to be faulty.
Test the compressor windings (refer to section
).
If the compressor windings are OK, replace the control unit (refer to section
) and repeat the
compressor control unit test.
If the compressor does not run with a new compressor control unit, the compressor may be seized.
While it is possible for the compressor to be seized, it is EXTREMELY unlikely.
Connection
wire
“C”
“T”
