Middleby Cooking Systems Group PS520E User Manual download pdf (Page 19)

SECTION 3

OPERATION

V. QUICK REFERENCE: TROUBLESHOOTING

SYMPTOM PROBLEM SOLUTION

light is lit,

food product is

undercooked

Oven will not turn on

at all

appears in display,

oven is not heating

Oven will not heat

Oven is operating, but

little or no air is

blowing from air

fingers

Conveyor moves with

a jerky motion, or will

not move at all

Food products are

overcooked or

undercooked

The oven temperature ex-

ceeded 650

F (343

C), and

the burner was automati-

cally shut down

Electrical power may not be

reaching the oven, or the

controls may be set incor-

rectly.

The oven did not reach

200

F (93

F) within 15 min-

utes of start-up, and the

oven has stopped heating.

Controls may be set incor-

rectly

Air fingers may have been

reassembled incorrectly af-

ter cleaning.

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

• 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.

• Check that the circuit breaker/fused disconnect is turned

on.

• Check that the “BLOWER”

Switch is in the “ON” or “I”

position.

• Turn the “HEAT” , “BLOWER” , and

“CONVEYOR” switches to the “OFF” or “O” position.

• Wait for AT LEAST FIVE MINUTES before restarting the

oven.

• Repeat the daily procedure.

• Check that the Set Point is correctly set.

• Check that both “BLOWER” and “HEAT”

switches are in the “ON” or “I” position.

• Wait for AT LEAST FIVE MINUTES before restarting the

oven.

• Repeat the Daily Start-up procedure. Check that the Set

Point is above 200

F (93

• Turn the oven to the “OFF” or “O” position, and allow to

cool. Disconnect electrical power to the oven.

• Refer to Section 4, Maintenance, for instructions on

reassembling the air fingers.

• Turn the oven to the “OFF” or “O” position, and allow 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.

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.

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Middleby Cooking Systems Group PS520E User Manual Page 19

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