Viking VCSB360 Service Notebook page 39

COMPONENT
PTC START The PTC Start Relay cannot be
RELAY tested. To determine its reliability,
use the following procedure:
1. Measure the R and W wires at
2. Check the overload relay to make
3. Test the run capacitor. (Use the
4. Use a test cord and start the com-
RUN Disconnect the wires and touch the
CAPACITOR ohmmeter probes to the two terminals.
TIMER To test the timer, perform the follow-
ing steps:
NOTE: The 1. Use a screwdriver and manually
production
timer (Paragon)
has a 10 hour
cumulative
run time with
a 21 minute
Defrost 2. Unplug the unit.
duration. 3. Disconnect the 4 wire connector
The service re-
placement timer 4. Set the ohmmeter to the Rx10k.
(Mallory) has
an 8 hour Checking the Motor:
cumulative run
time with a 21 1a. Paragon Timer: The motor wind-
minute defrost
duration.
TEST PROCEDURE
The compressor for 120 volts AC.
sure there is continuity through
It. (Use the previous test proced-
ure.)
following test procedure.)
pressor. If it starts, and the pre-
ceding checks are okay, the relay
Is defective.
turn the time clockwise until you
hear a "click." This will place
the timer in the "defrost" position
if the refrigerator was running,
the compressor and fans will
turn off.
from the timer.
ings have a capacitor connected
In series. Use the same procedure
that you would use for checking a
capacitor. Momentarily touch the
probes to terminals PK and R,
then reverse the probes and touch
the terminals again.
METER READING
The ohmmeter reading should peak
and then drop. Reverse the test
probes on the terminals and the
Same results should occur.
Paragon Timer - When you first touch
the terminals the meter should momen-
tarily deflect and show continuity.
39