Woodward 2301E, Инструкция по установке и эксплуатации, Страница: 143 / 182

Manual 26641 2301E Digital Control
Woodward 133
Symptom Cause Solution
Prime mover will not
start. Actuator not
moving to start fuel
position (continued). Minimum Fuel contact open. See
“MINIMUM FUEL CONTACT” in
Chapter 3. Check terminal 34. Minimum fuel contact
must be closed for normal operation. This
logic can be changed. Check for 18 to 36
Vdc from terminal 34(+) to 33(
–).
Speed sensor signal not clearing
failed speed signal circuit. Check wiring for proper connection. Check
shields for proper installation. Check the
Display Menu for Engine Speed reading.
Speed sensor not spaced properly
—check
for at least 1.0 V ac at terminals 25 and 26
during cranking. If less than 1.0 Vac, the
magnetic pickup may be spaced too far
from gear. Make sure there are no metal
chips on the end of pickup.
If no voltage is present, magnetic pickup
may be open-circuited or shorted. Make
resistance check with the leads
disconnected from control. Should be about
100 to 300 ohms.
Failed speed signal circuit may be disabled.
Check to see if this is programmed in the
Discrete Input.
Be prepared to make an emergency
shutdown when starting the engine,
turbine, or other type of prime mover, to
protect against runaway or overspeed
with possible personal injury, loss of
life, or property damage.
Faulty 2301E control. Replace.
Prime mover overspeeds
only on starts. Ramp adjustment. Increase RAMP TIME. This decreases
acceleration rate (from idle to rated).
RATED SPEED setting too high. Check that RATED SPEED is entered as
described in Chapter 4. Verify the Fuel
Demand % drops to minimum (0%) when
engine speed is greater than speed
reference.
Dynamics adjustment. Dynamics may be adjusted for sluggish
operation, causing overspeed on start.
Adjust GAIN for fastest stable response.
RESET may be adjusted too low. Increase
RESET setting.
Determine if engine is
malfunctioning. Verify that fuel rack is not binding and
linkage is properly adjusted. Determine if
the fuel rack is quickly following the actuator
input voltage. Check operation of
overspeed protection device(s).
Prime mover overspeeds
or causes excessive
smoke only on starts. Start Fuel Limit is inactive. Power up 2301E before cranking engine.
2301E control. If the control does not cut back the actuator
voltage [terminals 13(+) and 14(-)] when
engine speed is greater than speed
reference, the control may be programmed
for the wrong speed range. If the voltage is
cut back, look for a problem in the linkage
or actuator.