Twin Disc TA-90-8501, Operator'S Manual

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109
Twin Disc, Incorporated
Troubleshooting
Power Transmission System Operator’s Manual #1020510
After selection of an individual coil, a sub menu will be displayed, showing the
following options:
FULL ON , MODULATE , PRESET , and EXIT SUB MENU .
If FULL ON is selected, the selected coil will be powered with full on current.
The display will show the coil selected and display FULL ON . Depressing the
up arrow button will turn the coil off and go back to the sub menu.
If MODULATE is selected, the selected coil can be toggled on in increments of
5% of full current with the use of the up arrow button. It can be reduced in
increments of 5% of full current with the use of the down arrow button. The
display will identify the coil selected, the percentage of full current, and the
current value. (Example: TranSol2 55% .13A) The test can be terminated by
reaching 100% with the use of the up arrow button, or by simultaneously
depressing both the up and down arrow buttons at any time. These actions will
both result in
EXIT SUB MENU being displayed.
If PRESET is selected, current to the selected coil will be ramped linearly from
zero to full current in 15 seconds, and then from full current to zero current over
the next 15 seconds. This cycle will be continuously repeated until the up arrow
button is pushed. This will turn the current to zero, and return the control to the
sub menu listing the choices. While the cycling is continuing, the display will
identify the coil, the percentage of full current, and the current level.
If the range selector is moved into the neutral position after FULL ON ,
MODULATE , or PRESET has been selected, the test will be terminated, current
turned off, and DESELECT NEUTRAL will be displayed.