MEC 2 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM056 Rev 6 05/10/15 Thomson Technology
17
Note: All LED’s will be illuminated whenever a lamp test function is
performed.
3.2.3. CONTRAST ADJUSTMENT (R115)
A contrast adjustment potentiometer is located on the rear of the PCB and is
factory set for ambient temperatures of 15° to 30° Celsius. For different ambient
temperatures, consult the factory for adjustment procedures.
4. FAULT CIRCUIT DESCRIPTIONS
The MEC 2 engine-generator controller utilizes many analog and digital inputs to perform both
monitoring and control functions. Three types of fault circuits are used to monitor and control the
engine-generator set. The first type is Internal Fault Circuits that are derived from a
combination of digital and analog inputs. The second type is Digital Input Fault circuits that are
initiated from external contact inputs. The third type is Analog Input Fault circuits that are
initiated from external analog signal inputs. The following functional block diagram (FIGURE
#12) shows how all input/output fault circuits are organized.
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