Middleby Marshall PS640E - Manual (Page 28)

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SECTION 5
TROUBLESHOOTING
PROBLEM:
PRODUCTS ARE OVERCOOKED
OR UNDERCOOKED
Check for correct
setting of conveyor
speed control.
Set the conveyor speed
control at correct setting.
Check for correct
setting on tempera-
ture controller.
Turn temperature
control to correct
setting.
If products still cook incorrectly,
call your Middleby Marshall
Service Agency.
Verify the food
preparation process.
PROBLEM:
OVEN DOES NOT HEAT
Check to see if both BLOWER
switch and HEAT switch are in
the “ON” or “I” position.
If oven does not heat, call your
Middleby Marshall Service Agency.
PROBLEM:
BLOWER MOTOR IS RUNNING, YET LITTLE
OR NO AIR BLOWS FROM AIR FINGERS
Air fingers reassembled incorrectly,
after cleaning.
Assemble air fingers correctly, after cleaning.
Refer to Section 4 procedure, or call your
Middleby Marshall Service Agency.
PROBLEM:
OVEN BLOWER AND CONVEYOR OPERATE,
YET THE OVEN IS NOT HEATING
Start the oven again. If the oven still does not
heat, call your Middleby Marshall Service Agency.
Reset the temperature controller
to a new setting (above 200°F),
after turning the BLOWER switch
to off for 30 seconds.
PROBLEM:
OVEN DOES NOT TURN ON WHEN ITS
SWITCHES ARE TURNED ON
Check that all electric supply switches are set to
the “ON” or “I” position. Then, start the oven.
If oven still will not start, contact your Middleby
Marshall Service Agency.
PROBLEM:
CONVEYOR WILL NOT HOLD PROPER SPEED
OR WILL NOT RUN AT ALL
Check whether the conveyor is
jammed on something in oven.
Check for proper tension of conveyor drive
chain and conveyor belt. Refer to Section 4 for
correct procedure.
If conveyor still does not run correctly, contact
your Middleby Marshall Service Agency.
Check that the conveyor
drive sprocket is tight.