Middleby Cooking Systems Group PS536 - Manual (Page 20)

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ENGLISH
IV. QUICK REFERENCE: TROUBLESHOOTING
SYMPTOM PROBLEM SOLUTION
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 illu-
minates after
oven has been
operating nor-
mally
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 the "BLOWER" ( ) Switch is 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.
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
completely dur-
ing 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.
light is lit, oven will
not heat
appears in dis-
play, oven is not
heating
Oven shuts down
shortly after it is
turned on
(gas ovens only)
The gas burner did not light
within 90 seconds of turn-
ing the "BLOWER" ( )
Switch to the “ON” ("I") posi-
tion. This engages a safety
lockout mode.
The oven did not reach
200°F (93°C) within 15 min-
utes of startup, and has
stopped heating.
• Turn the "BLOWER" ( ) and "CONVEYOR" ( )switches to
the "OFF" ("O") position.
• Wait for AT LEAST FIVE MINUTES before restarting the oven.
• Repeat the Daily Startup procedure.
• Turn the "BLOWER" ( ) and "CONVEYOR" ( )switches to
the "OFF" ("O") position.
• Wait for AT LEAST FIVE MINUTES before restarting the oven.
• Repeat the Daily Startup procedure.
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.