TROUBLESHOOTING
4-2
POSSIBLE CAUSE(S) SUGGESTED REMEDY
Symptom #3 - Heat system does not recover quickly
D One, two or all three of the elements are bad.
208 volt = 12.3-13.6 W
220 volt = 13.8-15.2 W
240 volt = 16.4-18.1 W
440 volt = 58.0-61.0 W
480 volt = 65.6-72.6 W
D Dropped a phase from circuit breaker at electriĆ
cal panel.
D Dropped phase at contactor.
D The oven is out of calibration.
D Inadequate voltage supplied for oven configuraĆ
tion. (ie. 240 volt oven in a 208 volt environment)
D Replace bank of elements. Reference electrical
specifications on page NO TAG of the IntroducĆ
tion for amp draw.
D Check for voltage at the terminal block in the
oven across L1-L2, L2-L3, and L1-L3. The
voltage should match the supply to the building.
D If voltage is not present across any phase call the
electrician. Check for voltage at the contactor on
terminals T1-T2, T2-T3 and T1-T3. Make sure
the appliance is calling for heat. If voltage is not
present across any phase, replace the contactor.
D Reference the calibration procedures for the conĆ
troller configuration on your appliance. See
pages 3-2 through 3-11 of the Calibration and
Adjustment section.
D Change the element configuration to match the
incoming voltage. Transformers may also need
to be added for some applications.
Symptom #4 - Heat system does not heat, but motor operates
D Temperature controller set point below actual.
D Probe shorted or open.
D Raise set point.
D Take the resistance reading. Reference pages
3-18 through 3-21 of the Calibration and AdjustĆ
ment section for probe resistance information. ReĆ
fer to page 2-2 for wiring diagram P/N 18459.
For solid state manual controls, remove the wires
on terminals #6 and #7 on the solid state board.
Touch the wires together to allow the contactor to
power up. If the contactor closes, the problem is
in the temperature control circuit (consisting of
the board, probe and potentiometer). This is only
a test. DO NOT leave the oven during this test.
If the contactor closes place an ohm meter across
the probe wire. Note the resistance reading of the
probe as the temperature in the oven increases. At
no time should the probe go infinite or open before
the oven reaches 500_F (260_C). If it does the
probe is bad and should be replaced.
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