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Z-Chair
V I I . O P E R A T I O N
VSI CONTROLLER
The electronic controller is what you use to operate your Z-Chair. It takes the battery voltage and sends it to the appropri-
ate system. The electronic controller enables you to move the Z-Chair, as well as monitor battery charge, electronic
controller functions, and the condition of the electrical system. The VSI controller is an integral electronic controller. All of
the electronics necessary to operate the Z-Chair are contained in one module. See figure 24. Typically, the VSI is mounted
to one of the armrests and is connected to the motors and batteries on the power base.
The controller supplied with your Z-Chair has been pre-programmed to meet your needs. The program is set using either
a personal computer with software provided by the controller manufacturer or with a hand-held programmer, also pro-
vided by the controller manufacturer.
WARNING! The controller program can affect speed, acceleration, deceleration, and braking. If it
is programmed incorrectly or outside of the safe limits as determined by your healthcare
professional, it can create a dangerous situation. Only the Z-Chair manufacturer, an authorized
representative of the manufacturer, or a trained service technician should program the controller.
Figure 24. VSI Controller
The VSI consists of:
1. joystick
2. keypad
3. off-board charger/programming socket
4. controller connector
Joystick
The joystick controls the direction and speed of your Z-
Chair. When you move the joystick from the neutral (cen-
ter) position, the electromagnetic brakes release and allow
your Z-Chair to move. The farther you push the joystick
from its neutral position, the faster your Z-Chair moves.
When you release the joystick and allow it to return to the
neutral position, you engage the electromagnetic brakes.
This causes your Z-Chair to decelerate and come to a com-
plete stop.
WARNING! If your Z-Chair begins to
move in an unexpected manner,
immediately release the joystick. Unless
the joystick is damaged, this action
should stop your Z-Chair.
Keypad
The keypad is located in front of the joystick. It contains
keys necessary to operate your Z-Chair. See figure 25.
