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04 DOORS & WINDOWS
PARATRANSIT DOORS
The Bi-Fold paratransit door consists
of two panels fastened to the bus
with upper and lower pivots. Each
door panel has its own handle that
rotates locking rods, away from the
door jamb allowing the door to open
“outward”. Typically, two bi-fold door
leaf assemblies are used in a door
portal, one each opening to the right
and left sides, respectively. The bi-fold
door panels may also have gas struts
or dampeners installed to restrict the
free movement of the door leafs after
opening.
PERIODIC TESTING OF
DOOR SYSTEM
It is recommended that the Auto-
Reopen system be inspected
for function during preventive
maintenance cycles. This can be easily
accomplished by placing a resistance
on the door leaf during the close cycle
and ensuring that the door system
reopens.
DOOR TROUBLESHOOTING
Symptom: Door closes completely and
then reopens on its own.
u
Inspect “Null Switch” for proper
function. This switch is actuated by the
rod end spacer at approximately
95% of the closed position.
Symptom: Door starts to close and
then automatically reopens.
u
Observe the red L.E.D. mounted on
the PC board, if it illuminates, then the
current sensing trip point is set too
low. Gain access to the current sensing
adjusting potentiometer and turn
clockwise to increase set point. This
potentiometer is located to the left of
the red L.E.D.
Image: Paratransit Doors Closed
Image: Paratransit Doors Open
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