Duke 59-E3P Installation, Operation, Parts & Maintenance Manual - Page 12

Browse online or download pdf Installation, Operation, Parts & Maintenance Manual for Convection Oven Duke 59-E3P. Duke 59-E3P 20 pages. Electric half-size convection oven

Print Page
Electric Half-Size
Convection Oven Manual
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.
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
Orange
Red
White
Black
Transformer Secondary
Yellow-blue
Yellow-blue
Yellow-yellow
12

TROUBLE SHOOTING

Voltage
240-L1
208-L1
120-L1
L2
Voltage
12V (pin 4 & pin3)
12V (pin 2 & pin3)
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.