15
SECTION 3
OPERATION
V. QUICK REFERENCE: TROUBLESHOOTINGSYMPTOM PROBLEM SOLUTION light is lit,
food product is
undercooked
Oven will not turn on
at all
appears in display,
oven is not heating
Oven will not heat
Oven is operating, but
little or no air is
blowing from air
fingers
Conveyor moves with
a jerky motion, or will
not move at all
Food products are
overcooked or
undercooked
The oven temperature ex-
ceeded 6500F (3430C), and
the burner was automati-
cally shut down
Electrical power may not be
reaching the oven, or the
controls may be set incor-
rectly.
The oven did not reach
2000F (930F) within 15 min-
utes of start-up, and the
oven has stopped heating.
Controls may be set incor-
rectly
Air fingers may have been
reassembled incorrectly af-
ter cleaning.
Conveyor may be jammed
on an object in the oven, or
conveyor belt or drive chain
tension may be incorrect.
Controls may be set incor-
rectly
• Follow the procedures under Daily Shutdown Procedures
in this section to shut down the oven. Contact your
Middleby Marshall Authorized Service Agent to determine
and correct the cause of the condition to prevent damage
to the oven.
• Check that the circuit breaker/fused disconnect is turned
on.
• Check that the “BLOWER” Switch is in the “ON” or “I”
position.
• Turn the “HEAT” , “BLOWER” , and
“CONVEYOR” switches to the “OFF” or “O” position.
• Wait for AT LEAST FIVE MINUTES before restarting the
oven.
• Repeat the daily procedure.
• Check that the Set Point is correctly set.
• Check that both “BLOWER” and “HEAT”
switches are in the “ON” or “I” position.
• Wait for AT LEAST FIVE MINUTES before restarting the
oven.
• Repeat the Daily Start-up procedure. Check that the Set
Point is above 2000F (930C)
• Turn the oven to the “OFF” or “O” position, and allow to
cool. Disconnect electrical power to the oven.
• Refer to Section 4, Maintenance, for instructions on
reassembling the air fingers.
• Turn the oven to the “OFF” or “O” position, and allow 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.
• Check that the set temperature and bake time settings
are correct.