OT2106A Electronic Engine Governor Speed Controller
16
The
engine
cannot started up,
the actuator does
not move to the
start fuel supply
position
Check the voltage between terminal 11 (+) and12
(-)(the voltage should be less than 2V).
Speed
trimmer
potentiometer is broken
Cut off the power supply, use an ohmmeter to check
the speed trimmer potentiometer.
Overspeed
only
happens
when
engine the start up
The value of rising
time potentiometer is
set too small
Clockwise increases rising time potentiometer to
lower accelerating rate (from idle to rated speed).
The value of rated
speed potentiometer is
set too high
Re-set rated speed potentiometer.
Correction amplifier
adjustment
Running state of the controller is adjusted to a slow
run, this will lead to overspeed at startup. Slowly adjust the
gain to achieve the fastest steady-state response. Stable set
too low, increase stability settings.
Engine Trouble
Check whether the fuel supply gear lever is clamping
stagnation, whether adjustment of the fuel supply
connection is appropriate. Check whether the fuel supply
mechanism is moving fast with actuator input voltage.
When the overspeed protection device is operating
normally, check whether the shutdown action take place
while engine is not over-speeding.
Speed controller setup
issues
When the speed setting is counterclockwise set to
maximum, and the controller position output signal voltage
is not reduced, the controller may be bad, or the speed
range was set incorrectly. If the actuator voltage is
lowered, check whether the fuel supply connection or
actuator is in trouble.
engine occasionally
overspeed
after
reaching the rated
speed
Engine fuel supply
system breakdown
Check whether that the engine fuel supply system is
operating normally. If the actuator is moved to the
minimum fuel supply position during the overspeeding
process, then the problem is in the fuel supply system.
Speed
sensor
and
controller breakdown
Check the speed sensor output voltage (at least
1.0Vrms) when speed exceeds an idle speed. If the voltage
is less than 1.0Vrms and terminal 4 is closed, the controller
will ask for maximum fuel supply.
