Screen Message Description Corrective Action
High Signals Too much signal Check for proper product placement
or no product
Low Signals Too little signal Check for proper product placement
or no product
High Motor Speed Motor rpm above 1200 Call PSC
Low Motor Speed Motor Speed below 1000 Call PSC
Motor stopped Wheel motion not detected Call PSC
VCC Fault High/Low 5v power Measure 5v with multimeter
VN Fault High/Low –15v power Measure –15v with multimeter
VP Fault High/Low +15v power Measure +15v with multimeter
SPI Fault No communication to OI Check cable to OI
Dirty Window Window contamination Clean the window
High Temp Internal Temp > 65ْ Fit Cooling System
12.3 Corrective Maintenance
The MCT sensor and Operator Interface are modular in construction and an experienced electronic
maintenance technician can replace any damaged components.
The following components may be replaced in the field:
Main Circuit Board
Lamp
Filter Wheel Motor
Detector
Power Supply
Dome Mirror
Replacement of these parts requires that the MCT be removed from its plant location and brought to a
clean room or maintenance shop.
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