Tennant 7100, Service Manual

Page: 262 / 305

ELECTRICAL
4-94
7100 330695 (8 − 11)
INTERLOCKS
The 7100 has several interlocks which can inhibit
or cancel machine functions.
REVERSE − If the board does not sense an
active forward sense (P4 − 6) or neutral
sense (P4 − 12), the controller board will
assume reverse. When this happens the
following function will become inhibited:
− SQUEEGEE will rise. When the operator
disengages reverse, the squeegee function
will resume.
NEUTRAL − When the neutral input is active
(P4 − 12), the machine will detect neutral. At
this point, the following actions will occur.
When the machine detects the forward
switch, the functions will resume.
− WATER VALVE will turn off.
− 5 SECOND delay.
If the machine is still in neutral after the 5
second delay:
− SCRUB BRUSHES will turn off.
− SCRUB HEAD will raise slightly.
LOW BATTERY − The machine will cancel
the following functions when the last battery
LED is blinking (about 31.5 volts).
− SCRUB FUNCTION − The scrub function
will cancel as if someone toggled the scrub
button. The operator cannot restart the
scrub functions until the meter is reset. The
operator can reset the battery gauge by
unplugging the main battery connector.
− SQUEEGEE AND VACUUM FAN − The
machine will cancel squeegee operation, as
if someone toggled the squeegee button. If
the operator presses the squeegee button
after being canceled, the squeegee and
vacuum fan will resume operation for about
30 seconds.
The operator will reset the battery meter each
time the main battery connector is removed.
Each time the operator powers down the
controller, the machine will store the current state
of battery charge. When the operator powers up
the machine, it will recall the last state of charge,
and display it on the touch panel. If the operator
disconnects the main power connector, the
controller will assume the machine has been
charged. The battery meter will be reset the next
time the key is turned on.