Woodward ProTech 203, Руководство по эксплуатации

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Manual 85204 ProTech 203 Overspeed Protection System
Woodward 21
Chapter 5.
Troubleshooting and User Repairs
Troubleshooting
The following troubleshooting guide will help isolate problems in the ProTech
®
203 device, actuating system, plant wiring, MPUs, or elsewhere. Make the
checks in the order indicated.
To check the ProTech control thoroughly, troubleshoot each unit (A,
B, and C) separately. A unit consists of one complete speed-sensing
circuit, including the power supply, I/O module, and display board.
Symptom Cause Remedy
Prime mover
overspeeds after
operating at rated
speed for some
time Prime mover Check for proper operation of
the prime-mover fuel system.
If actuator moves toward
minimum fuel during
overspeed, problem is in the
fuel system.
Prime mover
does not trip on
overspeed Power is not applied to an
energized-to-trip ProTech
model Apply power to all ProTech
units.
The ProTech device is not
connected or is incorrectly
connected to the external
actuating system Check that the ProTech
device is installed properly.
Incorrect set point values
configured for one or more
units Check the MPU GEAR
TEETH and TRIP SPEED
SETPOINT configurations for
each unit to verify that they
are appropriate for prime
mover and the individual
MPUs.
If two or more units show a
TRIPPED indication, the
cause is the external actuating
system down-line from the
ProTech device Check for incorrect field wiring
and inoperable or incorrectly
calibrated actuating
equipment.
Prime mover trips
inappropriately More than one unit has been
overspeed tested at one time Reset the units.
Incorrect set point values
configured for one or more
units Check the MPU GEAR
TEETH and TRIP SPEED
SETPOINT configurations for
each unit to verify that they
are appropriate for prime
mover and the individual
MPUs.