Woodward ProTech 203, Operation Manual

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ProTech 203 Overspeed Protection System Manual 85204
22 Woodward
Symptom Cause Remedy
Inappropriate trip
during start-up Contact input was left open
and TIMER STARTS ON
RESET option is set to "Yes" If contact input is not used,
jumper together TB5-14 and
TB5-15 of each unit.
Incorrect set point values
configured for one or more
units Prime mover is not ramping to
configured speed in the
allotted time. Verify that the
MPU FAIL SETPOINT and
MPU FAIL TIMEOUT are
appropriate for the prime
mover.
Incorrect MPU signal Check that all MPUs are
correctly wired to the ProTech
device and are functioning
properly.
Inappropriate trip.
Hardware fault
annunciated EEPROM doesn't respond
correctly Reset the unit.
If fault continues, replace unit
(see "User Repairs" section
below).
Inappropriate trip.
Interlock fault
annunciated Internal cables aren't
connected correctly Check ProTech internal
cabling and installation
procedure.
Inappropriate trip.
CPU FAIL LED lit The ProTech microcontroller
is not functioning Replace the entire unit (see
"User Repairs" section below).
Prime mover
won't start
One or more de-energize to
trip units do not have power Check power supply fuses,
wiring, and power sources.
One or more ProTech units
need to be reset Press the RESET key.
A de-energized-to-trip
ProTech model is installed
when an energized-to-trip
model is appropriate—or vice
versa Verify the type of ProTech
model in Chapter 1.
Actuating wiring from the
ProTech device is incorrect Check actuating system for
proper normally open or
normally closed wiring.
Unit has LCD
display, but no
LEDs display—or
vice versa Unit is faulty Replace the entire unit (see
"User Repairs" section below).
Unit has neither
LCD nor LED
display Unit has no power Check that power is applied to
the unit.
Power supply fuses need to
be replaced Replace unit's power supply
board fuse (see "User
Repairs" section below).
Power supply board is faulty Replace the entire unit (see
"User Repairs" section below).
Unit is not
operating;
STATUS 1 & 2
and TRIPPED are
illuminated Unit needs to be reset Press the RESET key.
Unit won't RESET Remote RESET contacts are
closed Check that the remote RESET
operates as a momentary
contact.