Middleby Marshall PS629G Series, Owner'S Operating & Installation Manual

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SECTION 3
OPERATION
31
V. QUICK REFERENCE: TROUBLESHOOTING
SYMPTOM PROBLEM SOLUTION
Over Temperature LED is
lit, food product is
undercooked
The oven temperature
exceeded 650°F (343°C), and
the burner was automatically
shut down.
• 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.
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” (“I”) position.
•
Turn the HEAT, BLOWER, and CONVEYOR switches to the “OFF” (“O”)
position.
It appears in display that
oven is not heating
The oven did not reach 200°F
(93°C) within 15 minutes of
start-up, and the oven has
stopped heating
• Wait for AT LEAST FIVE MINUTES before restarting the oven.
• Repeat the Daily Start-up procedure.
• Check that the Set Point is correctly set.
•
Check that both the BLOWER and HEAT Switches are in the “ON” (“I”)
position.
Oven will not heat Controls may be set incorrectly.
• If the oven still will not heat, turn the HEAT, BLOWER, and CONVEYOR
switches to the “OFF” (“O”) position.
•
Wait for AT LEAST FIVE MINUTES before restarting the oven.
• Repeat the Daily Start-up 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 to the “OFF” (“O”) position, 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 to the “OFF” (“O”) position, 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.
• 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. A SERVICE AGENCY DIRECTORY IS SUPPLIED
WITH YOUR OVEN.