TROUBLESHOOTING
Del uxe Contr ol Cook & Hold ▪ Ser vic e Manua l ▪ MN- 4671 2 ▪ R ev 01 ▪ 1 1/ 20
54
The Oven Overheats
WARNING: Electric shock and arc flash hazard.
Use caution when measuring line voltage.
Wear Personal Protective Equipment (PPE).
Measure the internal oven temperature with an
independent thermometer. Is this measured
temperature higher than the registered temperature
on the display?
No
Measure the ohm value of the cavity sensor:
100±2Ω at 32°F
Outside of the tolerance: Replace sensor
Within the tolerance: Reconnect the sensor
Yes
Is the registered temperature at or above the set
temperature?
No
Allow the oven to continue heating. Measure
and monitor the current draw of the heat cables
to see if the SSR opens when the set
temperature is reached.
Yes
Measuring current draw to the heat cables, does the
current draw drop out when the unit reaches the set
temperature?
No
Continue monitoring the internal temperature.
If the internal temperature rises, peaks, and
then drops below the set temperature cycling
the SSR back on, the unit is operating properly.
Yes
Measure the AC voltage at the high limit going to the
heat cables between terminals 11 and 31. Do you
read line voltage between these points?
No
Remove power to the oven. Isolate each heat
cable wrap by removing jumper wires at the
mounting studs and check for continuity to
ground on both sides of each heat cable. If there
is continuity to ground, the heat cable is faulty
and would need to be replaced. Check for signs
of moisture or damage to the heat cable which
could have caused this failure.
Yes
Is there 12VDC at the coil of the SSR A (+) to A (-) for
upper / single cavity or B (+) to B (-) for lower cavity?
No
Faulty SSR.
Yes
Is there 12VDC at the J11 plug on the control board
between pins 1 and 2 for the upper / single cavity SSR
or 3 and 4 for the lower cavity SSR?
No
Inspect and repair wiring from SSR to control
board.
Yes
Update the oven software and cycle power. Does the
J11 plug continue outputting 12VDC to the SSR while
the registered temperature is above the set
temperature?
No
Measure and monitor the current draw to the
heat cable wraps to ensure the oven is now
cycling at the set temperature.
Yes
Inspect the communication cable between CB and IB.
Does the J11 plug continue outputting 12VDC to the
SSR while the registered temperature is above the set
temperature?
No
Measure and monitor current draw to heat cable
wraps to ensure the oven is now cycling at the
set temperature.
Yes
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