13
Electric Half-Size
Convection Oven Manual
OVEN NOT RECOVERING WHEN BAKING
1. Check the Duty Cycle ON-TIME setting.
2. Measure the actual ON-TIME and OFF-TIME
with a stopwatch or use the second hand of a
wristwatch or clock to see if the oven is being
controlled properly.
3. If the oven turns on and off at the proper times,
the fault is within the oven. Check amp draw
to each element. Be certain oven is supplied
with proper voltage. (240 volt elements on
208 volt power supply, for instance.)
4. If the oven does not turn on and off at the
proper times, replace the controller.
BISCUITS TOO DARK (OVER BAKED)
1. Reduce the duty Cycle ON TIME until the biscuits
are the correct brownness.
BISCUITS TOO LIGHT (UNDER BAKED)
1. Increase the Duty Cycle ON-TIME until the
biscuits are the correct brownness.
CONTROL FAILURE DIAGNOSTICS
There are two types of failures that will shut down the
oven and display numbers that indicate the cause of
the trouble:
1. TEMPERATURE PROBE OPENS
Should the controller’s probe/cable become an
open circuit following occur:
A. The oven is turned off
B. The alarm begins beeping
C. The display will show four (4) nines (9999)
Press one of the five START switches to turn off
the alarm.
Replace the probe/cable.
2. OVEN STAYS ON TOO LONG
If the oven stays ON for over fifteen (15) minutes,
and this ON condition is caused by the controller
receiving an improper temperature signal, the
following will occur.
A. The oven is turned off.
B. The alarm begins beeping
C. The display will show four (4) sevens (7777)
Press one of the START switches to turn off the
alarm.
Check the probe’s temperature by pressing the
ENTER switch. If the indicated temperature is
less than the actual oven temperature, the probe
cable is probably shorted, causing a second
thermocouple at a lower temperature. Replace
the thermostat probe/cable.
If the temperature shown in the display is about
the same as that of the oven’s, the problem is
probably the Controller. Replace the controller.
TROUBLE SHOOTING - continued
