20
E. CHARGING
CIRCUIT
The charging circuit produces a DC voltage of 33 volts
plus or minus one volt. This must be read between
the charge strip on the charge (+DC) cam to the gear
rack on the track (-DC).
If you are not receiving 32 to 34 volts DC check the
following:
1. Verify that the power supply/charger is plugged
into the wall outlet. Check for 115 VAC at
outlet.
2. Verify that the charger is producing the 33
volts. This is done by checking voltage from B+
(pointed end of plug) to B- (fl at side of plug).
3. If this is all correct, verify the ring terminal B- is
mounted to a T-bolt on the track and tighten
down the nut to secure the ring terminal. This
will ensure that the proper ground is made
through the T-bolt or screw. Reconnect power
supply.
4. If you still do not get the 33 volts DC, verify
that your charging station is hooked up to one
of the white wires leading from the B+ wire.
Check voltage.
5. If you still do not get the 33 volts DC verify
that the gear rack screw on top and bottom
of each piece of gear rack is tight. This will
ensure proper grounding of the gear rack.
When the unit has been parked at the charge station
for three minutes, it should be receiving charge. If the
unit starts to beep while on the charge station, the unit
is still not receiving charge. Check the following:
1. Check that the charge springs are contacting
the tabs on the track.
2. Verify that all wires in the unit are connected
properly and that polarity is correct.
Remove the shroud to check DC voltage at charge
spring between '' and 'charge -' on board.
The unit should now be receiving the 33 volts DC
needed for proper charging of the batteries.
F. UP/DOWN
LOGIC
When the lift is commanded to run, the controller board
will immediately sound a single beep and the lift will
pause momentarily before moving.
If the lift is commanded to stop by releasing a control
switch/button, the lift will decelerate to a stop in 1.5
seconds. However, if the switch/button is pressed
again, before the lift has reached a complete stop,
the lift will immediately start to accelerate.
The lift has a fi xed acceleration rate of 3.0 seconds.
The priority of the input signal to the lift for a direction
command is dependant on which input was received
fi rst.
G. BEEP
ALERTS
The controller board will sound a single 0.35 second
departure beep upon receiving a signal to run.
The controller board will sound a 2.5 second beep
upon receiving a signal to run if the battery voltage is
low (11.0 VDC to 21.0 VDC) and will not run.
The control will sound two rapid beeps if current
overload occurs
The controller board will beep on and off for 20 sec-
onds once every fi ve minutes when the charger is not
connected.
H. WHAT TO DO IF THE LIFT IS STUCK ON A FINAL
LIMIT SWITCH
(MANUALLY LOWERING THE LIFT)
Remove the seat mount shroud.
Remove the fuse.
Note: Never perform manual lowering with the
stair lift circuit connected.
Insert an 8mm socket over the hex shaft located
at the end of the motor. Rotate the shaft to move
the stair lift off of the fi nal limit switch.
Install the fuse and cover
Summary of Contents for Citia BOS
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