Middleby Marshall PS770G GAS User Manual download pdf (Page 17)

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.

No gas pressure

Burner did not light

• Make sure main gas is on.

• Turn oven off, and restart. If it still does not light, call for

service.

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.

Oven is not up to operating

temperature.

Conveyor may be jammed.

• Allow oven to preheat.

• Turn oven off, and allow to cool. Check conveyor for block-

age.

Conveyor will not move.

SYMPTOM PROBLEM SOLUTION

The internal battery needs

to be replaced to retain

energy mode timings.

• A qualified service technician should accomplish this.Battery Symbol in the

lower right hand corner

Clean and replace the

front fan filters.

• Failure to do this will eventually shut down the oven due to

excessive temperature.

High Control Compart-

ment Temperature

The computer has

detected a problem with

either the main, or burner

blowers.

• This should be corrected by a qualified service technician.Main Blower problem or

Combustion Blower

problem.

SCREEN ALERTS

Control Over Temp Front filters are clogged • Clean or replace filters.

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

Energy saving mode 2 Normal Operation

Energy saving Mode 3 Normal operation

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Middleby Marshall PS770G GAS User Manual Page 17

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