7
8.
MAINTENANCE AND SERVICING
8.01 Troubleshooting
WARNING
DANGEROUS VOLTAGES EXIST WITHIN
THIS UNIT. SERVICE SHOULD BE
PERFORMED ONLY BY QUALIFIED
PERSONNEL. DISCONNECT THE UNIT
FROM ITS ELECTRICAL SOURCE. REMOVE
THE SHELVES AND THERMOMETER IF
INSTALLED. DISCONNECTING ANY
COMPONENT FROM THE CIRCUIT
WITHOUT PRIOR REMOVAL OF THE POWER
SOURCE MAY CAUSE DAMAGE TO OTHER
CIRCUIT COMPONENTS.
8.02 Temperature Variance or Fluctuation
1. Make sure vent shutter cap is not closed.
Open to the maximum position.
2. Test unit when empty; if results are
satisfactory the chamber was improperly
loaded. Redistribute the load.
3. Be sure to allow ample time for an empty
chamber to stabilize at the desired
temperature setting. It could take over one
hour to equilibrate depending upon the
differences between ambient and operating
temperatures. The mass of the load can
also affect stabilization time.
4. Make certain severe line voltage fluctuations
are not occurring.
5. Make certain all wire connections are secure
at their terminals.
6. Make certain that an intermittent failure of
the switch, thermostat or wiring has not
occurred. Isolate the cause; repair or replace.
8.03 Heat Loss
Inspect door gasket to make certain it fits firmly
against cabinet at all points. Replace gasket if
torn or damaged.
Improper Door Closure -
Inspect door latches
which are spring loaded to see if they pull the
door in tightly against the body of the oven. If the
"finger" of the latch (in the door) has been
sprung into the body of the latch, use a pen or
similar object to pop it back out. Check the oven
cabinet to see that it is level. Use a spirit level
and turn the four adjustable feet on the bottom of
the oven to make it level.
No Heat -
If the chamber does not heat, first
check the line voltage, circuit breakers and/or
fuses of the line circuit. Check if all electrical
connections are secure.
