POTENTIOMETER TEST
Certain procedures in this section
require electrical test or
measurements while power is
applied to the machine. Exercise
extreme caution at all times and
follow Arc Flash procedures. If test
points are not easily accessible,
disconnect power and follow
Lockout/Tagout procedures, attach
test equipment and reapply power to
test.
Fig. 31
1.
Remove potentiometer from control panel as
outlined in REMOVAL AND REPLACEMENT OF
PARTS.
2.
Turn potentiometer shaft fully counterclockwise
to the lowest setting.
3.
Set VOM to measure resistance.
4.
Connect meter leads to the white and black lead
wires on potentiometer terminals.
A.
Resistance should measure approximately
zero ohms.
5.
Slowly turn potentiometer shaft clockwise over
the full range of travel and monitor resistance
change on the meter.
A.
Resistance should measure 800 to 1200
ohms with shaft turned fully clockwise.
B.
If the resistance value increased smoothly
without sudden drops or spikes and the full
travel resistance value is within tolerance
then potentiometer is functioning properly.
C.
If the resistance value did not increase
smoothly but had drops or spikes over the
full travel range then potentiometer is not
functioning properly. Install a replacement
potentiometer and check for proper
operation.
THERMOCOUPLE TEST
Certain procedures in this section
require electrical test or
measurements while power is
applied to the machine. Exercise
extreme caution at all times and
follow Arc Flash procedures. If test
points are not easily accessible,
disconnect power and follow
Lockout/Tagout procedures, attach
test equipment and reapply power to
test.
Fig. 32
1.
Access the temperature controller as outlined in
REMOVAL AND REPLACEMENT OF PARTS.
2.
Remove thermocouple lead wires from
temperature controller.
Electric Countertop Tilting Kettles, K6ETT, K12ETT, K20ETT - SERVICE PROCEDURES AND ADJUSTMENTS
F35496 Rev. A (1117)
Page 16 of 28
