Middleby Marshall PS200 series - Manual (Page 17)

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E. Basic Troubleshooting Flowcharts
1. IF THE GEAR MOTOR RUNS AT FULL SPEED:
SECTION 3 - SERVICING COMPONENTS
NOTE:
Middleby no longer stocks parts for the original
speed controller with interchangeable microcom-
puter. If it is necessary to replace this version of
the controller or the microcomputer, and the
service agent does not have the parts in stock, it
will be necessary to replace the entire speed
controller with a current model.