English – Middleby Marshall PS555G GAS User Manual
Page 16
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ENGLISH
IV. QUICK REFERENCE: TROUBLESHOOTING
SYMPTOM
PROBLEM
SOLUTION
The oven temperature ex-
ceeded 650°F (343°C), and
the burner or heating ele-
ments 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.
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
light is lit, food product is
undercooked
Oven will not
turn on at all
Oven shuts down shortly
after it is turned on
(gas ovens only)
appears in display,
oven is not heating
Oven will not heat
Oven is operating, but
little or no air is blowing
from air fingers
Electrical power may not be
reaching the oven, or the
controls may be set incor-
rectly.
The gas burner did not light
within 90 seconds of turn-
ing the "HEAT" (
) Switch
to the ON ("I") position.
This automatically en-
gages a safety lockout
mode.
The oven did not reach
200°F (93°C) within 15 min-
utes of startup, and the oven
has stopped heating.
Controls may be set incor-
rectly.
Air fingers may have been
reassembled incorrectly
after cleaning.
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.
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.
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 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 200°F (93°C).
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.
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.
Check that the set temperature and bake time settings are
correct.
Conveyor moves with a
jerky motion, or will not
move at all
Food products are
overcooked or
undercooked.
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.