Middleby-marshall KIT P/N 36939 Manuel d'utilisateur télécharger pdf (Page 12)

Diagnostic Error Messages

The controller runs background tests during normal operation. If a problem with the background tests occurs, an error

message is shown (flashing) in the Display. These are called Diagnostic Error Messages (Table 3).

Display

Corrective Action

rPLC

rSET

OPEn

r TC

Oven temperature has

not reached at least

200˚F(93˚C) within 15

minutes of operation.

Usually a result of the

burner not lighting.

1. Turn Blower Switch OFF for 2

minutes, then Turn Blower Switch

ON.

2. If problem does not clear, call

the Middleby Cooking Systems

Group (MCSG) for assistance.

Caused by an

open circuit in the

thermocouple circuit.

1. Check that the thermocouple is

connected to terminals 7 & 8 of the

temperature controller.

2. If connections are good, then check

the continuity of the thermocouple at

room temperature. The resistance

reading should be in the 9 - 20 Ohm

range. Remove & replace an open

thermocouple.

3. If the thermocouple checks good,

call MCSG for assistance.

Reverse polarity of the

thermocouple leads.

1. Check the polarity of the

thermocouple leads; terminal 7 (-)

RED wire & terminal 8 (+) WHITE

wire.

2. If polarity connections are

correct replace thermocouple.

Flashes on the display

alternately with

temperature indicating

that the controller’s

internal diagnostics test

has failed.

1. Turn Blower Switch OFF for 2

minutes, then Turn Blower Switch

ON.

2. Replace the controller if the

problem does not clear after repeating

action 1 above three times.

Table 3 - Diagnostic Error Messages

Oven temperature has

not reached at least

200˚F(93˚C) within 15

minutes of operation;

usually a result of the

burner not lighting.

Middleby Marshall Inc. • 1400 Toastmaster Drive • Elgin, IL 60120 • (847) 741-3300 • FAX (847) 741-4406

Middleby Corporation 24 Hour Service Hotline 1-800-238-8444

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Middleby-marshall KIT P/N 36939 Manuel d'utilisateur Page 12

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