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TEMPERATURE in °F RESISTANCE ±5 OHMS
350 836
400 887
450 938
HEATING ELEMENT TEST
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
MODEL
WATTAGE/
VOLTAGE
RESISTANCE*
KA7E,
KA7EM
2500/208 18
2500/240 24
3000/208 16
3000/240 21
*Tolerance +5 / -10 %.
PUMP, K3 RELAY COIL TESTS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
MODEL PUMP RESISTANCE ±5 OHMS
KA7E Drain 87
KA7E Wash 32
KA7E,
KA7EM*
Grease
Peristaltic
14
KA7E K3 190
*Models with grease assist option only.
CONTROLS CALIBRATION
Calibration Procedure
NOTE: See Table 12 at the end of this procedure.
1. Place temperature tester probe in the geometric
center of oven cavity.
2. Program a set point of 350 degrees. Allow oven
temperature to cycle 3 times. Oven display
temperature reading should equal the set point of
350 degrees.
3. Record the temperature tester readout for an
additional 3 cycles. It should cycle around a set
point.
4. Calculate the amplitude. Amplitude = (Turn Off -
Turn On). An amplitude of more than 40 degrees
may indicate a failed element. See heating
element test.
5. Calculate the average. Actual average = (Turn
On + Turn Off ) divided by 2. Variance (between
actual average and programmed set point) of
greater than 5 degrees indicates that adjustment
is needed.
6. To adjust:
A. Enter SERVICE MODE - PROGRAMMING
AND DIAGNOSTICS, enter parameter
number 5 Temperature Offset.
NOTE: The P key is used to toggle the minus sign on
and off. Use this key if a negative value must be
entered.
B. If the actual average temperature is higher
than the programmed set point, then enter
a positive offset value of the same amount.
(For example if the oven is cycling around
an actual average of 360 degrees, adjust by
entering an offset of +10.)
C. If the actual average temperature is lower
than the programmed set point, then enter
a negative offset value of the same amount.
(For example if the oven is cycling around
an actual average of 340 degrees, adjust by
entering an offset of -10.)
1) The offset can be adjusted + or - 30 deg
F, but is only functional within the
operating limits of the oven. Factory
setting is 0.
7. To save the setting, press the enter key.
8. Turn the power switch to off and then on again.
The oven will remember the changes.
9. To recall the offset value, enter SERVICE MODE
- PROGRAMMING AND DIAGNOSTICS, enter
parameter number 5 Temperature Offset. Verify
that the value you set is visible on the time
display.
KA SERIES ELECTRIC ROTARY OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
F25294 Rev. A (0412) Page 44 of 72