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

Page: 48 / 52

SECTION 5
TROUBLESHOOTING
48
SYMPTOM PROBLEM SOLUTION
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 in Section 3.
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 in Section 3.
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.