646 Chair Crash Avoidance System Troubleshooting
The illustrations show only the components that are monitored by the Crash Avoidance System.
The Tilt Sensor PC Board is shown for reference only. It does not affect the Crash Avoidance System. Only the wires that affect this function are shown.
The Crash Avoidance System prevents damage to the chair by disabling the Tilt Down function if a potential crash situation is detected.
Serial Number Range: V2200 thru V1977127
When is Tilt Down function disabled?
The main PC board continuously monitors the Tilt Down and Foot Extension* limit switches.
*The foot extension switch is tripped when upward pressure is applied to the foot section.
If either normally closed limit switch is tripped, the Tilt Down function is disabled.
Serial Number Range: V1977128 thru Present
When is Tilt Down function disabled?
The Motor Control PC board continuously monitors the Tilt Down and Foot Extension* limit switches.
*The foot extension switch is tripped when upward pressure is applied to the foot section.
If either normally closed limit switch is tripped, the Tilt Down function is disabled.
