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SERVICE PROCEDURES AND ADJUSTMENTS
Certain procedures in this section require electrical test or measurements while power is applied
to the machine. Exercise extreme caution at all times. If test points are not easily accessible, disconnect power and
follow lockout / tagout procedures, attach test equipment and reapply power to the test.
TEMPERATURE CONTROLLER
TEST
Fig. 25
1. Place kettle in full upright position. (tilt kettles
only)
2. Set temperature dial to lowest setting. Kettle
must be below 110°F before verifying the
potentiometer output to the controller is good
over the full range of temperature dial travel.
3. Access TEMPERATURE CONTROLLER.
4. Check all lead wires for secure connections to the
controller terminals. Wiring harness lead wires
must be connected to T1-T2 and T3-T4 for proper
input to controller.
5. Re-connect power to the machine.
6. Turn power switch on.
7. Verify temperature controller is receiving
120VAC at terminals T1-T3 and T2-T4 and
machine is properly grounded.
8. Slowly turn temperature dial to the highest setting
and monitor heat light over the full range of travel.
A. Verify heat light (amber) comes on and
heating element is energized.
B. If heat light does not remain on or flashes
momentarily as temperature setting is
slowly increased, verify condition of
potentiometer as outlined under
POTENTIOMETER TEST.
NOTE: Temperature controller will de-energize
internal relay and turn off the output status LED if the
circuitry detects an open thermocouple. LED will begin
to flash 3 times, pause, then repeat the flash sequence
to indicate the open thermocouple condition.
C. If heat light and heating element do not turn
on.
1) Verify condition of thermocouple as
outlined under THERMOCOUPLE
TEST.
2) Verify output from terminal T8 on
controller as outlined in the steps
below.
9. Disconnect lead wire from terminal T7 on the
controller.
A. Verify 120VAC between lead wire from T7
and X1 on the output of main transformer. If
correct, re-connect lead wire to terminal T7
and continue with procedure.
B. If incorrect, check pressure switch (1PS)
and water level controller (WLC LLCO).
10. Verify 120VAC between T8 and X1 on the output
of main transformer. If correct, output from
controller is functioning properly.
A. If incorrect, install a replacement
temperature controller and check for proper
operation.
Electric Stationary and Tilting Kettles - SERVICE PROCEDURES AND ADJUSTMENTS
F45472 (1112) Page 14 of 29