Systems Descriptions; General Operation; Electrical - Braun VISTA Series Installation & Service Manual

Braun VL917 Fully Automatic lifts
are powered by an electric/
hydraulic system operating two
single-acting hydraulic main
cylinders for power up/fold and
gravity unfold/down operation.
This combination reduces battery
drain and helps prevent lift
alignment problems.
The hydraulic system supplies
hydraulic fluid to and from the
cylinders which unfold, lower,
raise and fold the platform.
Automatic Floor Level Switch-
ing: VL917 Series lifts feature
automatic floor level switching.
This feature eliminates the need
for the lift operator to position and
stop the platform at vehicle floor
level when unfolding the platform
from the stowed position and
when raising the platform from
ground level.
Power Source: The lift draws its
power from a 12 volt DC battery
(standard models). Special
applications are powered by a 24
volt system.
Ground: The lift electrical
system must be grounded to the
vehicle frame for proper opera-
tion. See the Lift Ground on
page 17 of this manual.

Systems Descriptions

General Operation

Pressing the UNFOLD switch
unfolds the platform from the
stowed position to floor level.
The platform stops automatically
at floor level when fully unfolded.
Pressing the UP switch raises the
platform from the ground level to
floor level. When raising the
platform from ground level, the
platform automatically stops at
floor level when raised fully.
The automatic floor level switch-
ing is controlled by two indepen-
dently adjustable microswitches
(limit switches). See page 28.
Read warning at right! If the lift
platform does not automatically
stop at floor level as outlined,
discontinue lift operation
immediately. Contact your lift
sales representative or call The
Braun Corporation at 1-800-THE
LIFT.

Electrical

Pump Motor: Motor brushes
are not replaceable. The pump
motor must be replaced if the
brushes become worn.
Circuit Board: The circuit
board serves as the logic control
center of the lift allowing mul-
tiple functions in a compact
package. The circuit board is
not repairable, and must be
replaced if defective.
W ARNING
Maintenance and
repair procedures
must be performed
as specified by
authorized service
personnel only.
Failure to do so may
result in serious
bodily injury and/or
property damage.
W ARNING
Discontinue lift use
if platform does not
stop automatically at
floor level. Failure to
do so may result in
serious bodily injury
and/or property
damage.
Circuit Sentry: This manual
reset circuit breaker protects the
system from overloads (100
ampere for 12 volt systems and
70 ampere for 24 volt systems).
The Circuit Sentry is located as
close to the battery as possible
for maximum protection. In event
of failure, wait 60 seconds, then
turn the RESET lever to reset the
breaker.
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