Middleby Marshall PS640E - Manual (Page 22)

III. QUICK REFERENCE: TROUBLESHOOTING
SYMPTOM PROBLEM SOLUTION
No electrical power • Check that the circuit breaker/fused disconnect is on.
Make sure the emergenct stop button is on. Oven will not
turn On.
Faulty contactor
Faulty heater element
• Replace contactor.
• Replace element.
Oven will not
heat.
Air fingers may be as-
sembled incorrectly after
cleaning. • Turn oven off, and allow to cool. Reassemble fingers
correctly. Oven is operating, but
little or no air is coming
from the fingers.
Conveyor may be jammed. • Turn oven off, and allow to cool. Check conveyor for
blockage. Conveyor will not move.
SYMPTOM PROBLEM SOLUTION
The internal battery needs
to be replaced to retain en-
ergy mode timings. • A qualified service technician should accomplish this. Battery Symbol in the
lower right hand corner
Clean rear grills. • Failure to do this will eventually shut down the oven due to
excessive temperature. High Control Compartment
Temperature
IV. SCREEN ALERTS
Control Over Temp Rear Grills are clogged. • Clean grills.
Front belt jammed Front belt has stopped. • Remove obstruction, and restart oven.
• If no obstruction, call service.
Rear Belt jammed Rear belt has stopped. • Remove obstruction, and restart oven.
• If no obstruction, call service.
High Temp Error Thermocouple or • Call service.
PLC malfunction.
Belt off-Oven not Normal operation until
in temperature Oven reaches operating
temperature.
Energy Saving Mode 1 Normal operation.
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