If the microcontroller determines that the EEPROM is not responding correctly, a
trip occurs. The trip cause is annunciated as a hardware fault. If this type of fault
occurs, reset the unit. If the fault continues to occur, replace the unit and return it for repair.
If the microcontroller determines that the data in EEPROM has been corrupted,
the display shows "eeprom data lost". If this type of fault occurs, reset the unit. If
the fault continues to occur, replace the unit and return it for repair.
The microcontroller monitors an interlock signal which indicates that the internal
hardware cables are connected correctly. If this signal indicates a missing
interlock, a trip occurs. The cause of the trip is annunciated as an interlock fault.
If this fault occurs, check all cable connections.

After a normal rolldown, each ProTech unit monitors the MPU. If the MPU
frequency exceeds 110 Hz, the unit trips and annunciates the cause as NO RESET.
FIREYE 95UVS2-1 INSIGHT SCANNER INTEGRATED UV SENSOR
An MPU loss-of-signal occurs when an MPU frequency of less than 100 Hz is
measured and the previously measured speed was greater than 120 Hz. The
alarm relay de-energizes, and the MPU FAIL LED turns on and remains on until
a reset or until power is cycled. If the TRIP ON MPU FAILURE option is "yes", a
trip occurs. If the previously measured speed is less than 120 Hz, it is assumed
that a normal rolldown has occurred. The MPU FAIL LED does not turn on, the
alarm relay does not de-energize, and no trip occurs.
Installations with severe electromagnetic interference (EMI) may require shielded
cable run in conduit, double shielded wire, or other precautions. Contact
Woodward for more information.
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