Xo 4, Troubleshooting Manual, Page: 70 / 88

XO 4 & XO FLEX TROUBLE SHOOTING GUIDE
Version 3.30 70
XO CHAIR
The chair movements are generated by two electrical motors and monitored by hall sensor devices that
keeps the chair within the range of motion accommodated by the drive mechanisms controlling the chair.
The Calibration Mode is a programmed routine of chair movements that locates the begin/end travel
points. After calibration all the previous stored values in memory are erased. To reprogram them refer to
the XO flex user guide.
Failure description Reason Solution
The chair does not run
properly (hacking while
moving).
The chair is not calibrated or out
of calibration. Synchronize the chair according
to the notice YB-755 “Chair
synchronization”.
The “stand controller” is
defective The “stand controller” AO-891
generates signal.
No movement of the chair
when the joystick or control
pedal is activated.
The lifting motor is overheating In case of an overheating of the
motor, a thermostatic sensor is
activated. The cooling time is
approximately 15 minutes.
The Hall sensor is not close
enough to the motor spindle. Loosen the lock nut.
Tighten the Hall effect sensor
until the sensor touches the
magnet.
Loosen the tower Hall effect
sensor from ¼ turn
Tighten the lock nut and make
sure the sensor is attached.
The Hall sensor is defective. Replace the Hall sensor Hall CA-
047. Picture and instruction how
to change the cable down below.