TGA300 Rev180405
13
OPERATION
Note: When power is applied to the governor the message display shows the
Software Program Revision Number for ve (5) seconds. It can also be viewed
with P101 code, refer to Programming Section.
On power up the governor is in the pressure mode of operation. The RPM display shows
engine RPM, the four LED bar graphs are green indicating readings within normal ranges,
and the message display will alternate between showing the date and time.
If a monitored function is not within normal parameters the display ashes, the RPM
display shows an error or fault warning code and a description shows in the message display.
(Refer to Table 2. Error Codes or Table 3. Fault Warning Codes.)
If one of the inputs displayed by the LED bar graphs is not within normal range the
LEDs will be red and ashing.
When all necessary throttle enables are active and the interlock circuit is complete, the
THROTTLE READY LED lights and the governor is ready to control the engine RPM.
Controls
INC/DEC Buttons (TGA300 Only)
The INC and DEC buttons are used to change pressure and RPM settings or program
preset values. The rate and amount the numbers change when a button is pressed depends
on the mode and how long the button is held.
Pressure Mode. Press either button momentarily to change the pressure setting by
1 PSI. Press and hold the button for more than 2 seconds and the pressure setting
changes by 5 PSI twice, then by 10 PSI until the button is released.
RPM Mode. Press either button momentarily to change the RPM setting by 10 RPM.
Press and hold the button for more than 2 seconds and the RPM setting changes by
50 RPM twice, then by 100 RPM until the button is released.
Control Knob (TGA400 Only)
The control knob is used to adjust pressure and RPM settings. The governor senses
how fast and in what direction the control knob is rotated and send a signal to the ECM to
increase or decrease the engine RPM proportionally.
If the control knob is rotated quickly; the engine RPM changes quickly.
If the control knob is rotated slowly; the engine RPM changes slowly.
• Rotate the control knob clockwise* to increase engine RPM.
• Rotate the control knob counterclockwise* to decrease engine RPM.
• Press the red IDLE button to immediately return the engine to idle.
*NOTE: Opposite knob rotation option is available to increase/decrease the
engine RPM.
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