Troubleshooting; Types Of Notifications; Procedure For Warnings And Error Messages; Wheelchair Control Unit Error Overview - Otto Bock Juvo Instructions For Use Manual

7.4 Troubleshooting

INFORMATION
In the event of communication problems in the bus system of the controls, the system triggers an emergency stop
and thus prevents any uncontrolled functions.
► Note that after every emergency stop, you have to turn the power wheelchair control unit on again.
► If the driving function is still not available after turning the control unit on again, activate pushing mode by
releasing the brake.
► Inform the qualified personnel immediately.

7.4.1 Types of notifications

Warning
A warning indicates a status or malfunction of one or several components of the power wheelchair. The function of
components without errors is not restricted.
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
Battery undervoltage
Left motor not connected
Wiring fault on the left
motor
Right motor not connected e.g. defective plug connec­
Defective cables on right
motor
Driving function blocked
due to external factors
Juvo
Cause
Battery deep discharge
Battery cable malfunction­
ing or faulty connection to
the battery
e.g. defective plug connec­
tion, cable break
e.g. cable break, no con­
nection to battery
tion, cable break
e.g. cable break, no con­
nection to battery
Battery charger may be
connected
Maintenance and repair
Possible corrective action
Charge as soon as possible
Check the connection to the battery
(charge the battery if the connection is
good)
Check plug connections and cable to
left motor
Check cable connections to left motor;
check connection to battery terminal
Check plug connections and cable to
right motor
Check cable connections to right
motor; check connection to battery ter­
minal
Disconnect battery charger
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