18
ENGLISH
IV. QUICK REFERENCE: TROUBLESHOOTING
SYMPTOM
PROBLEM
SOLUTION
IF THESE STEPS FAIL TO RESOLVE THE PROBLEM, CONTACT YOUR LOCAL MIDDLEBY MARSHALL
AUTHORIZED SERVICE AGENT. A SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN.
SECTION 3 - OPERATION
Check that the set temperature and bake time settings are
correct.
Food products are
overcooked or
undercooked
Controls may be set incor-
rectly.
The oven temperature is in
excess of 600°F (316°C). If
the oven is left in operation,
the temperature may rise to
650°F (343°C) and cause a
shutdown.
Turn the oven off according to the Daily Shutdown Procedure.
Allow the oven to cool. Regardless of the time that is required
for the oven to cool, wait for AT LEAST FIVE MINUTES before
restarting the oven.
Repeat the Daily Startup Procedure.
light illuminates
after oven has been
operating normally
Oven will not
turn on at all
Electrical power may not be
reaching the oven, or the
controls may be set incor-
rectly.
Check that the circuit breaker/fused disconnect is turned on.
Check that the "BLOWER"
(
)
Switch is in the ON ("I")
position. The burner cannot engage until the blowers are in
operation.
Oven will not heat
Controls may be set incor-
rectly.
Check that the Set Point is correctly set.
Check that both the "BLOWER"
(
)
and "HEAT" (
) Switches
are in the ON ("I") position.
If the oven still will not heat,turn the oven off according to the
instructions in the Daily Shutdown Procedure.
Wait for AT LEAST FIVE MINUTES before restarting the oven.
Repeat the Daily Startup Procedure. Check that the Set Point
is above 200°F (93°C).
Oven is operating, but
little or no air is blowing
from air fingers
Air fingers may have been
reassembled incorrectly
after cleaning.
Turn the oven off according to the Daily Shutdown Procedure.
Refer to Section 4, Maintenance, for instructions on reassem-
bling the air fingers.
Turn the oven off according to the Daily Shutdown Procedure.
Check if the conveyor is blocked by an object inside the oven.
Check that the conveyor drive chain is not overtightened.
Refer to Section 4, Maintenance, for instructions on checking
the conveyor belt tension.
Conveyor moves with a
jerky motion, or will not
move at all
Conveyor may be jammed
on an object in the oven, or
conveyor belt or drive chain
may be overtightened.
The oven has not yet heated
to the set point tempera-
ture.
Allow at least 25 minutes after oven startup before beginning
to load the product into the oven. Preheating the oven is
necessary for proper, consistent cooking results.
Food product is
undercooked, and
temperature in upper
display is cooler than
temperature in lower
display
Blower belt may be broken.
Turn the oven off according to the Daily Shutdown Procedure.
Contact your Middleby Marshall Authorized Service Agent to
correct the problem.
Oven shuts down com-
pletely during normal
operation
The oven temperature ex-
ceeded 650°F (343°C), and
the oven was automatically
shut down.
Turn the oven off according to the Daily Shutdown Procedure.
Contact your Middleby Marshall Authorized Service Agent to
determine and correct the cause of the condition to prevent
damage to the oven.
