Middleby Marshall PS360-U - Manual (Page 18)

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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.
• 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.
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.
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 reassem-
bling the air fingers.
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 "HEAT" ( ), "BLOWER"
( ) , and "CONVEYOR" ( )switches to the "OFF" ("O")
position.
• Wait for AT LEAST FIVE MINUTES before restarting the oven.
• Repeat the Daily Startup procedure. Check that the Set Point
is above 93°C.
appears in display,
oven is not heating
The oven did not reach
93°C within 15 minutes of
startup, and the oven has
stopped heating.
• 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 Startup procedure.
"RESET" ( ) switch is
illuminated, oven will not
heat
(gas ovens only)
The gas burner did not light
within 90 seconds of turn-
ing the "HEAT" ( ) Switch
to the “ON” ("I") position.
• Press the "RESET" ( ) switch (repeatedly if necessary) to
attempt to light the burner.
• If the burner does not light within 15 minutes, the oven will enter
a safety lockout mode that disables the "RESET" (
) switch.
If this occurs, turn the "HEAT" ( ), "BLOWER" ( ) , and
"CONVEYOR" ( )switches to the "OFF" ("O") position. Wait
for AT LEAST FIVE MINUTES before restarting the oven. Then,
repeat the Daily Startup procedure.
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.
The oven temperature ex-
ceeded 343°C, and the
burner or heating elements
were 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.
light is lit, food product is
undercooked