•
OVERSPEED shutdown setting
DWC-2000 has a Test switch to determine the OVERSPEED set point and test the engine
shutdown function. If you want to adjust the OVERSPEED set point at the speed about 10%
higher than the RUN set speed, use the Test switch. When the engine is operating at the Run set
speed in pushing the Test switch, rotate the Overspeed Adjust. by CCW until the Overspeed
shutdown function is operated. When the Test switch is pushed, the Overspeed set point is
reduced to 10/11 of the real set point.
•
RUN ramp turn-On speed setting
When the engine is operating at the Run set speed, adjust the Run lamp adjustment CCW until
the lamp is on. Then, more rotate 1/2 turn by CCW.
•
CRANK ramp turn-on speed setting
When the engine is operating at the Idle set speed(800rpm), adjust the Crank lamp adjustment
CCW until the lamp is on. Then, more rotate 1.5 turns by CCW.
5) System troubleshooting
•
System Inoperative
If the engine governing system does not function, the fault may be determined by performing the
voltage tests described in steps 1,2,3,and 4. (+) and (-) refer to meter polarity. Should normal
values be indicated as a result of following the trouble shooting steps, the fault may be with the
actuator or the wiring to the actuator. See the actuator publication for testing details.
- 127 -
STEP
TERMINALS
NORMAL VALUE
PROBABLE CAUSE OF ABNORMAL READING
1. DC battery power not connected. Check for
1
F(+) & E(-)
Battery Supply
blown fuse.
Voltage(24V)
2. Low battery voltage.
3. Wiring error.
1. Gap between speed sensor and gear teeth
too great. Check gap.
2
C & D
1.0VAC RMS min.,
2. Improper or defective wiring to the speed
while cranking
sensor. Resistance between terminals C and
D should be 30 to 1200ohms
3. Defective speed sensor.
10VDC,
1. Short on terminal P.
3
P(+) & G(-)
Internal Supply
(This will cause a defective unit.)
2. Defective Speed Control.
1. SPEED adjustment set too low.
1.0 - 2.0 VDC
2. Short/open in actuator wiring.
4
F(+) & A(-)
while cranking
3. Defective speed control.
4. Defective actuator.
See Actuator Troubleshooting.
