8. Fuel system
139
EMC (Electromagnetic Compatibility)
To satisfy EMC requirements, the controller unit should
be mounted on the grounded metal side, and it is
required to use shielded wires for all signal lines and
ground all the shields to one of the bolts used to mount
the controller.
No product with EMC-related quality issues arising from
not following the above instruction will be guaranteed.
Functions
1. (1) Speed: Adjusting the engine speed
2. (2) Gain: Adjusting the gain (governing sensitivity)
3. (3) Stability: Adjusting the stability (governing
response)
4. (4) Starting Fuel: Adjusting the fuel amount at engine
start up
5. (5) Speed Ramping: Adjusting the time to reach the
rated speed
6. (6) Idle: Adjusting the idle speed
7. (7) Droop: Adjusting the percentage (%) of droop
8. (8) Dip Switch: Adjusting the dip switch
9. (9) Over Speed: Adjusting the point when overspeed
lamp is on and the relevant relay is activated
10. (10) Run Lamp: Adjusting the point when run lamp is
on and the relevant relay is activated
11. (11) Crank Lamp: Adjusting the point when crank lamp
is on and the relevant relay is activated
12. (12) TB1: Terminal block for input and output
13. (13) TB2: Relay terminal for overspeed mode
(capacity - 2A/125VAC).
14. (14) TB3: Relay terminal for run mode (capacity -
2A/125VAC).
15. (15) TB4: Relay terminal for crank mode (capacity -
2A/125VAC).
Adjustments
1. The ranges of resistance indicated on the case are
applicable only to DI engines.
2. For potentiometer adjustment, use a small sized (-)
screw driver. (Be cautious of potentiometers being
damaged)
3. Check that all electrical connections are correctly
made and terminal screws tightened.
DV2213193B
DV2213193C
4. Engine Startup
Connect terminals G and M (with idle switch ON).
1) (4) Starting Fuel
Note) Reason for adjustment: To maximize the fuel effi-
ciency of the engine
* Purpose of adjustment:
Note) Recommended position: Between the 1 and 5
o’clock positions
Note) Possible problems: Between the 7 and 1 o’clock
positions
→
starting problems due to a lack of fuel
supply; The 5 o’clock position or above
→
decreasing fuel efficiency and increasing exhaust
emissions at engine start up
2) Turn (5) Speed Ramping to between the 9 and 12
o'clock position.
Note) The time to reach the rated speed (run speed)
prolongs as turning (5) Speed Ramping clockwise
(max. over 10 sec)