Otto Bock Juvo - Error Handling and Diagnostics

Forexample, if the connection between the control unit and seat motor is faulty, this error will only be indicated if
the user attempts to activate the motor. However, the driving function is still available.
Error
An error affects one or several functions of the power wheelchair. The power wheelchair and its functions are not
fully operational until the fault is resolved.
Structure of an error message
The control unit display shows both errors in the control system itself as well as errors in electrical components of
the power wheelchair or errors in the cabling. The error message contains the following information:
• Affected module – e.g. JSM = joystick module (control panel); PM = power module (control unit)
• Error code (4 characters)
• Abbreviated error description
7.4.2 Procedure for warnings and error messages
• If a warning or error message appears, the power wheelchair can often no longer be driven. In this case, the
error message must be noted, the control unit switched off and the qualified personnel informed of the error
message immediately.
• If the error is related to a component which is not currently being used (e.g.to an actuator for adjusting the
seat function), the driving function of the power wheelchair is still theoretically usable. An error message simply
appears at regular intervals.
• Nonetheless, the control unit must be switched off for several minutes in this case. If the error message contin
ues to appear after switching on the control unit, the error message must be noted, the control unit switched
off again and the qualified personnel informed of the error message immediately.
7.4.3 Wheelchair control unit error overview
VR2 control panel
Flashing LED Error/warning Cause Possible corrective action
Battery undervoltage Battery deep discharge
Battery cable malfunc
tioning or faulty connec
tion to the battery
Charge as soon as possible
Check the connection to the battery
(charge the battery if the connection
is good)
Left motor not connected e.g.defective plug con
nection, cable break
Check plug connections and cable
to left motor
Wiring fault on the left
motor
e.g.cable break, no con
nection to battery
Check cable connections to left
motor; check connection to battery
terminal
Right motor not connec
ted
e.g.defective plug con
nection, cable break
Check plug connections and cable
to right motor
Defective cables on right
motor
e.g.cable break, no con
nection to battery
Check cable connections to right
motor; check connection to battery
terminal
Driving function blocked
due to external factors
Battery charger may be
connected
Disconnect battery charger
Joystick fault Joystick not in home pos
ition when the unit is
turned on
Move the joystick to the home posi
tion before switching the unit on
Controller fault Defective controller Check all connections
Brake release Open brake release Check motor brakes
Check connection to the controller
105Juvo
Maintenance and repair