Troubleshooting Guide 21
Part 1 Check the battery voltage.
When troubleshooting a powerchair, battery voltage is
always the first thing to check. Check the battery
voltage through the 3-pin battery charger port located
on the front of the controller.
Set voltmeter to the 50 volt dc (V dc) scale.
Place the leads into the two outside pins of the
battery charger port as shown in the image to
the right.
Measurement should be approximately 25 V dc
If the voltage is 20V dc or less:
A battery charger may not recognize an extremely low voltage and will not charge
the batteries.
You will need a dealer to boost charge the batteries to bring the voltage up to a
level that the charger will see, then, plug the battery charger into the chair and
recharge the batteries for at least 8 hours.
If you are unable to charge the batteries, you will need to replace BOTH batteries.
If the voltage is below 25V dc:
Recharge batteries for at least 8 hours.
Check that the wiring is not damaged and that all cables are connected properly.
Check that the pins are seated in the connectors properly and the fuses are good.
If the voltage is dropping too quickly, perform a load test on the
batteries as follows:
Place the voltmeter leads into the two outside pins of the
battery charger port, as shown. Sit in the powerchair and
drive it.
After an initial drop, the voltage will hold steady at
approximately 24V dc or higher when driving with a load
in the chair.
If the voltage continues to drop while driving, BOTH the batteries
will need to be replaced.
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