Middleby Marshall PS528E User Manual

SECTION 4 

MAINTENANCE

35

4.  Reattach conveyor guard to control panel and secure 

two screws.
Install both upper end plugs.

Shut OFF all electrical power and lock/tag out 

the switch before attempting maintenance work. 

NOTE: It is recommended that the 3-month maintenance 

be  performed  by  an  authorized  Middleby  Marshall 

technician.

A.  Electrical Terminals
Open  the  control  cabinet  door  by  removing  the  three 

screws from the control cabinet door. Tighten all electrical 

control terminal screws including the electrical contactor 

terminal screws as shown in Figure 4-35.

B.  Ventilation
Check that the air circulation throughout the oven is not 

blocked and is working properly.

A.  Check brushes on D.C. conveyor motor, when worn 

to less than 1/10″ (2.4mm), replace the brushes.
B.  Check your oven venting system.

•  Installation of replacement parts requiring access 

to the interior of the oven is permitted only by an 

authorized service technician.

•  If there are any problems with the operation of 

the oven, the authorized service technician must 

be called.

•  It is suggested to obtain a service contract with a 

manufacturer’s authorized service technician.