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3-4
SECTION 3
OPERATION
V. QUICK REFERENCE: TROUBLESHOOTING
SYMPTOM PROBLEM
appears in display,
oven is not heating
The oven did not reach
200°F (93°C) within 15
minutes of startup, and
the oven has stopped
heating.
SOLUTION
Turn the BLOWER Switch to the OFF position.
Wait for 30 seconds.
Repeat the Daily Startup procedure.
light is lit, food product
is undercooked
The oven temperature
exceeded 650°F (343°C),
and the burner was auto-
matically shut down.
Follow the procedures under DAILY SHUTDOWN
PROCEDURES to shut down the oven. Contact your
Middleby Marshall Authorized Service Agent to deter-
mine and correct the cause of the condition to prevent
damage to the oven.
Oven shuts down
shortly after it is
turned on
Turn the HEAT switch to the OFF position.
Wait for 60 seconds.
Repeat the Daily Startup procedure.
The gas burner did not
light within 90 seconds of
turning the HEAT Switch
to the ON position. This
automatically engages a
safety lockout mode.
Oven will not heat Controls may be set in-
correctly.
Check that both the BLOWER and HEAT Switches are
in the ON position.
If the oven still will not heat, turn the BLOWER Switch
to the OFF position.
Wait for 30 seconds.
Repeat the Daily Startup procedure. Check that the Set
Point is above 200°F (93°C).
Oven will not
turn on at all
Electrical power may not
be reaching the oven, or
the controls may be set
incorrectly.
Check that the circuit breaker/fused disconnect is turned
on.
Check that the BLOWER Switch is in the ON position.
The burner cannot engage until the blowers are in
operation.
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, and allow it to cool. Disconnect
electrical power to the oven.
Refer to Section 4, Maintenance, for instructions on
reassembling the air fingers.
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 tension may
be incorrect.
Turn the oven off, and allow it to cool. Disconnect
electrical power to the oven.
Check if the conveyor is blocked by an object inside the
oven.
Refer to Section 4, Maintenance, for instructions on
checking the conveyor and drive chain tension.
Food products are
overcooked or
undercooked.
Controls may be set in-
correctly.
Check that the set temperature and bake time settings
are correct.
IF THESE STEPS FAIL TO RESOLVE THE PROBLEM, CONTACT YOUR LOCAL MIDDLEBY
MARSHALL AUTHORIZED SERVICE AGENT.