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Sequence of Operations for LED’s on the Vane
(Assumes Traveling UP and Stopping at Top Landing)
The binary LEDs enter the vane first and start to decelerate the lift to slow speed. The valve
FUNCTION display indicator changes from F3 (UP fast speed) to F1 (UP deceleration) and
then to F2 (UP slow speed). The lift continues traveling UP in F2 mode (Up slow speed). The
LU LED enters its lane next, but does not switch the control to LEVELING mode until DZ
enters. Once LU and DZ have both entered the lane, the control is in LEVELING mode and
the lift continues UP. The STROBE LED enters its lane next. Once the STROBE enters its
lane, the registered call to the top landing is canceled and the top landing S relay energizes,
indicating to the controller that the lift is now at that particular floor. The car floor indicator
changes. A partial circuit to permit unlocking the door interlock is also closed. The lift
continues leveling UP, and the NLU (Normal Limit Up) switch enters its cam.
Note that the NLU does not typically function to stop the lift at the floor level unless there has
been a failure of the STROBE signal. As the lift continues UP, the LU LED leaves its lane and
the lift stops at the floor level. The valve FUNCTION display goes blank when the lift stops.
The technician should ensure that the NLU enters its cam for about 3/4" before the LU LED
leaves its lane and the lift stops. The NLU also functions as a redundant switch for the
unlocking of the interlock at the floor level (for electrical interlocks). It ensures that only the
lock at the same floor where the lift is located will unlock. This is a safety feature of the
controller.
While the lift is at the floor level, all of the LEDs on the Opto-Reader should be aligned on the
center of the vane. The sequence of operation and the functions of the LEDs and Opto-
Reader are identical whether the lift approaches an intermediate floor or a terminal landing.
Intermediate landings do not require left side switch assemblies.
The technician should keep in mind that the vanes require no adjustment to their surface. It is
not necessary to scrape or add tape or paint to the vanes, as was necessary with the previous
controller version. It is necessary, however, to ensure that the leveling speed is slow enough
to allow the LU or LD to leave the lane and stop the lift in the shortest possible distance. If the
speed of leveling is too fast, the momentum of the lift will carry the car too far and the LD
(Level Down) will actuate.
FLOOR VERIFICATION INFRA-RED (AUTOMATIC SWING DOORS ONLY)
When there are three (3) or more floors, an FVIR Assembly is supplied for each of the
intermediate landings (floors) as a floor verification. The IRTX Transmitter PC Board comes
pre-installed on the top of the left side mechanical switch bracket, as shown in Figure # 48.
The five (5) transmitting LEDs contained in the IRTX should be pointing slightly away from
each other. With the cab at each intermediate landing, run the IRRX Receiver from the
Halfway Box to the appropriate floor location and clamp it onto the left rail, as shown in Figure
# 49. When the elevator is at the appropriate floor, align the IRRX with the center of the five
(5) IRTX LEDs. If this feature is not installed, the interlock will not function.
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