User Manual

Page 20 of 26
Comments:
Up and Down travel is
controlled by limit switch trigger
ramps which trip a series of
switches incorporated into the
carriage. The downward limit is
set at the lowest position and
the upper limit set at maximum
possible height at the factory.
The upper limit is then adjusted
to the required upper landing
height during installation.
Comments:
This is a normal condition and
indicates the proper operation
of the safety pan. A buildup of
leaves or snow can cause this
condition and requires removal
before VPL will operate
correctly.
Comments:
The latch is spring loaded and
will normally rotate into the fully
closed position as the VPL
travels downward and the roller
loses contact with the platform
side wall. If the latch if not fully
closed when the VPL has
traveled down approximately
2", the latch monitor switch will
stop the VPL operation and the
Top Landing Gate indicator
light will illuminate.
Solution:
Adjust upper limit trigger
ramp as needed. Refer to
the VPL Installation Manual.
This adjustment should only
be made by a qualified
technician. Consult your
dealer for service related
information.
Solution:
Run VPL upward, remove
object below platform and
resume operation.
Solution:
Assure latch rotates freely.
Check for damage which
prevents latch from
operating, check that catch
rod on Top Landing Gate
aligns properly with latch. If
latch or catch rod are
damaged they may need to
be replaced. Consult your
dealer for additional
information. WARNING: Do
not operate VPL while
handling the latch.
Potential
Cause:
Upper limit switch
trigger ramp is out
of adjustment
Potential
Cause:
Object underneath
platform contacting
safety pan and
stopping downward
travel
Potential
Cause:
Top Landing Gate latch is
not rotating to
the fully
closed
position
Symptom:
VPL stops above
or below upper
landing level and
Enter/Exit indicator
light illuminates.
Symptom:
VPL stops during
downward travel
and the
Obstruction light
illuminates when
down button is
pushed.
Symptom:
VPL will only travel
a few inches down
from upper landing
and Top Landing
Gate indicator light
illuminates when
the Up or Down
button is pushed.
Button
Pressed:
UP
Button
Pressed:
DOWN
Button
Pressed:
UP or
DOWN
Control Panel Display:
Control Panel Display:
Control Panel Display: