Doosan DP158L Series, Руководство по эксплуатации и техническому обслуживанию

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Wiring
Please refer to the chart above for the basic electrical wiring. When connecting the actuator and battery to ter-
minals A, B, E and F, the wire thickness must be at least 1.3
mm
2 . If the wires are long, they must be thicker in
order to reduce drops in voltage.
For the positive (+) battery terminal "F," a 15 A fuse must be used as shown in the picture.
The ground cable of the magnetic pick-up sensor connected to terminals "C" and "D" must either use two
wires twisted together for its entire length or be shielded.
The shielded part of the wire for the magnetic pick-up sensor must be connected to terminal "D." The shielded
part must be insulated so that it is not grounded to the engine. Otherwise, an incorrect frequency signal may
be delivered to the speed control unit.
The voltage of the magnetic pick-up sensor must be at least 1V while the engine is running.
How to Adjust the Engine Performance (For New Controllers)
1. Before starting the engine
(1) Set the gain and stability potentiometers of the controller to the central positions.
(2) Starting fuel
Turn the potentiometer as far clockwise as possible. (The position in which the most fuel is supplied)
(3) RPM ramping
Turn it as far counterclockwise as possible. (The position in which the reaction speed is quickest)
(4) Turn the idle potentiometer as far clockwise as possible.
(5) Connect terminals G and M. (To maintain the idle rpm after starting the engine.)
2. After starting the engine
Once the engine is started, move the actuator to the maximum fuel supply position, then maintain the idle
rpm after starting it.
(1) Check the state of ignition and adjust the starting fuel and speed ramping suitably.
(2) If the engine appears unstable after starting it, turn the gain and stability potentiometers counterclock-
wise to adjust them until it stabilizes.
(3) After disconnecting terminals G and M, use the speed potentiometer to adjust the maximum rpm.
(4) After reconnecting terminals G and M, adjust the idle rpm to 750 rpm, disconnect the connecting wires
and then check and adjust the maximum rpm.
3. Setting the engine rpm
If the speed potentiometer of the controller is turned clockwise, the setting value of the engine rpm
increases. In order to do so, a 5K potentiometer must be installed between terminals "G" and "J."
4. Adjusting the characteristics of the actuator
Do the following after setting the engine to the rated no-load speed.
(1) Turn the gain potentiometer clockwise until the engine characteristics become unstable. Slowly turn
the potentiometer clockwise until the engine stabilizes again. In order to obtain an accurate setting
value, turn the potentiometer counterclockwise slightly.
(2) Turn the stability potentiometer clockwise until the engine characteristics become unstable. Slowly
turn the potentiometer counterclockwise until the engine stabilizes again. In order to ensure accuracy,
turn the potentiometer counterclockwise slightly.