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5.2 Error Messages
For troubleshooting purposes, the control unit of the B500/B500-S power wheelchair identies
the following categories depending on the effect of the malfunction on the system:
❒ Error
❒ Warning
❒ Defect
A warning indicates a status or malfunction of one or several individual components of the B500/
B500-S power wheelchair.
All problems that have ever occurred are saved in a list and can be retrieved, e.g. in case of a
general overhaul of the B500/B500-S power wheelchair. The saved data can be used to deter-
mine future service and maintenance intervals, for example.
The following tables show the different status and error messages on the display.
Controller temperature
warning
Overheating due to
excessive load
Cool down phase
Motor temperature warn-
ing
Joystick warning Joystick not in zero
position when
switching on
Hand control device fault Defective joystick Bring joystick to zero
position before swit-
ching on
Communication error
(alternating ashing signal)
Defective connection
between the hand
control device and
the controller
Check cabling, software
or hardware
Battery under voltage Deep discharge of
battery
Charge as soon as
possible
Battery over voltage Voltage too high
(after full charge and
driving downhill)
Continue driving slowly
Seat tilt motor fault
Faulty cabling /
plug contact
Defective actuator
Check cabling / plug
connections
Back angle adjustment
motor fault
Lift seat motor fault
Electric footrest motor fault
Drive motor fault Faulty cabling /
plug contact
Defective drive
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