Woodward 2301D, Инструкция по установке и эксплуатации, Страница: 101 / 130

Manual 26247 2301D/2301D-EC Digital Control
Woodward 93
Troubleshooting Charts
Symptom Cause Solution
Prime mover will not
start. Actuator not
moving to start fuel
position.
If the actuator moves to
start position, a
problem with the prime
mover fuel supply is
indicated.
Supply voltage polarity reversed
(dc only), or no supply voltage. On power up the CPU status LED should
come on for 30 seconds.
Check for proper voltage from terminals
45(+) to 46(–). Reverse leads if polarity is
incorrect.
Actuator not responding to input
signal from control.
The hydraulic actuator must
have oil pressure and gear
rotation to operate (respond).
If there is a voltage output at control
terminals 13(+) and 14(–), but the actuator
does not move, the wiring to the actuator
should be checked for opens or shorts. With
the EG3P actuator, remember that
terminals C and D of the mating plug should
be jumpered.
Make resistance checks at the actuator.
Coil resistance on Woodward actuators is
approximately 35

. (Read with leads at
terminals 13 and 14 disconnected.)
Start fuel limit set too low. Check Fuel Demand % in the Display
Menu. If it is not going to Start Fuel value
when cranking, check to see Engine Speed
is reading cranking speed. If Fuel Demand
is reading 0, increase the Start Fuel Limit.
Actuator or linkage. Check actuator and linkage for proper
installation and operation. Problems may be
oil supply, direction of rotation, insufficient
drainage, linkage, worn actuator
components, or improper adjustment.
No actuator voltage at terminals
13 and 14. Check for shorted or grounded actuator
leads by removing wires to terminals 13 and
14. Stop prime mover. Close the switch on
terminal 32 (Failed Speed Sensor
Override). Check for 18 to 22 V at terminals
13 and 14 for forward acting controls, and 0
to 1 volt for reverse acting controls.
Check that Display Menu is reading engine
speed during cranking. If no speed reading ,
check the MPU.
Check for at least 1 Vrms at terminals 28
and 29, and at least 5% of the minimum
rated speed frequency range.
Speed setting too low on initial
start. Control may be configured for the wrong
speed range. Check that the number of
teeth and the rated speed have been
entered correctly. Speed setting may be
lower than cranking speed. Control should
be set for rated speed.
LOW IDLE SPEED setting may be
set too low. Check that the LOW IDLE SPEED setting is
entered correctly.
Minimum Fuel contact open. See
“MINIMUM FUEL CONTACT” in
Chapter 3. Check terminal 31. Minimum fuel contact
must be closed for normal operation. Check
for 20 to 40 Vdc from terminal 31(+) to
30(–).