Duke 59-E3C, Инструкция по установке, эксплуатации, комплектующим и обслуживанию

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D. Emergency Back-Up System
Your oven is equipped with an emergency back-up
system to be used should the computer controller
ever malfunction.
It is intended only to be used
to keep you in operation until a service agent
arrives to provide repairs
.
Operation: Turn power switch to off position. Push
the toggle switch located on the right access panel
of the oven to the up position.
Turn power switch clockwise to cook position. The
oven will now maintain a temperature of 375° by the
back up thermostat. You will need to manually time
your bake cycle until the biscuits are baked. No
display will be illuminated.
Call your local authorized service agent to
render repairs as soon as possible.
E. Troubleshooting (Only by an authorized
service agent)
Oven Not Heating
1. Oven heating lamp is off.
2. Digital display in the controller is not lit.
(Make sure backup thermostat control
switch is in the down position.)
3. Check the 24VAC from the transformer. If
voltage is present, replace the controller.
4. If no voltage, check the transformer and
transformer input voltage. Make certain the
correct transformer input voltage taps are
used.
Transformer Primary Voltage
Orange 240-L1
Red 208-L1
WHITE 120-L1
BLACK L2
Transformer Secondary Voltage
Yellow-blue 12V (pin 4 & pin3)
Yellow-blue 12V (pin 2 & pin3)
Yellow-yellow 24V (pin 4 & pin 2)
DIGITAL DISPLAY IN THE CONTROLLER IS LIT,
OVEN NOT HEATING
A simple test.
1. Turn the oven off.
2. Disconnect the oven control connector to
J1 on the PCB
3. Insert a short insulated jumper wire
between pins 1 and 3 in the oven control
connector. Make sure the wire is
insulated and bare wire cannot touch
ground or other metal parts. (CAUTION:
Line voltage present.)
4. Turn the oven on.
5. If the oven heats up, turn the oven off,
remove the jumper from the oven control
connector, and replace the oven control
connector. Check the controller's
setpoint. If the setpoint is correct,
replace the controller.
6. If the oven does not heat up, the
problem is within the oven.
7. Turn the oven off.
8. Remove the jumper wire and replace the
connector.
9. Oven Heating Lamp is on. The problem
is within the oven.
OVEN TOO HOT (OVEN STAYS ON)
1. Turn the oven off.
2. Disconnect the oven control connector
(J1)
3. Turn the oven on.
4. If the oven heats up, the problem is
within the oven.
5. If the oven does not heat up, turn the
oven off, and replace the oven control
connector on J1, then turn the oven back
on. Proceed to 6.
6. Press the ENTER switch to read the
oven's temperature.
7. Indicated temperature is obviously less
than it should be.
8. The thermocouple cable may be shorted,
or,
9. The controller may be defective.
10. Replace the temperature probe.
11. If the temperature now indicates the
correct temperature, the problem was
the temperature probe.
12. If the temperature still indicates lower
than expected, replace the controller.