Duke E SERIES - 5;9 Ccsi Control with Backup Thermostat

33
Service Manual for Electric Convection Oven
5/9 CCSI CONTROL WITH BACKUP THERMOSTAT
Note: Troubleshooting is based on a properly programmed Controller.
SYMPTON CAUSE REMEDY
Oven not heating, Blower not
operating, Oven Heating lamp
is off
Oven not plugged into an
operating power source
Blown fuse
POWER Switch not in the ON
position
Oven Door not closed
Cam not activating Door Switch
Plug oven into a power source
with the proper rating.
Replace fuse.
Turn POWER Switch to the ON
position.
Close Oven Door completely.
Check for proper Door Switch
operation.
POWER Switch is in the ON
position but Oven not heating,
Blower not operating
Defective POWER Switch
Defective Controller
Defective Power Transformer
Defective Step-Down
Transformer
Check and replace POWER
Switch.
Replace Controller.
Check for correct voltage at input
and output of Power Transformer
and replace if not correct.
Check input and out voltage of
Step-Down Transformer. Replace
if input voltage present but no or
incorrect output voltage.
Blower operating but Oven
not heating
Defective Contactor
Defective Elements
Check for voltage at both the input
and output side of Contactor. If
present at input but not present at
output, replace Contactor.
Replace Elements.
Oven does not heat to
selected temperature level
Defective Element
Defective Contactor
Defective RTD Probe
Defective Controller
Replace Element assembly.
Replace Contactor.
Replace RTD Probe.
Replace Controller.
Oven temperature continues
to rise above selected
temperature
Defective RTD Probe
Defective Controller
Replace RTD Probe.
Replace Controller.
Probe failures can be indicated by the controller display.
If the oven shuts off and displays 9999, the probe has an open circuit and must be replaced.
If the oven shuts off and displays 7777, the probe is shorted and must be replaced.