SECTION 6—TROUBLESHOOTING
47
Troubleshooting - Battery
Troubleshooting - Electrical
NOTE: For additional troubleshooting information and explanation of error codes, refer to the
individual Electronics Manual supplied with each wheelchair.
All Wheelchairs
SYMPTOM
PROBABLE CAUSE
SOLUTIONS
Batteries won’t
charge.
Blown battery fuse in wiring harness,
or charger.
Check all fuses on the chair, and in the charger.
Charger not plugged into outlet.
Make sure charger is plugged into the outlet.
No AC power at the outlet.
Check for AC power with a digital volt meter.
Charger Power cord may be
damaged, or the connector may be
damaged.
Check for damage and replace if necessary, or
send in for repair.
Battery voltage too low to charge.
Test voltage and change batteries if voltage is too
low.
Batteries have
short driving range
during a single
charge. Battery
Gauge falls off
faster than normal.
Consumer not charging batteries long
enough.
Instruct consumer to charge for 8-10 hours mini-
mum.
Batteries may be weak.
Perform load test or check “Battery Quality Menu”
with the programmer. Refer to MKIV electronics
manual, part number 1043576.
Check programming settings.
Torque setting and power level setting may be too
high. Refer to MKIV electronics manual, part num-
ber 1043576.
Heavy load on motors.
Chairs weight distribution may be offset (wheel-
chair may be front loaded).
E28 Error code.
Charger still plugged in when user tries
to drive the wheelchair.
Unplug charger to drive wheelchair.
Batteries have
swelled up.
Batteries have been overcharged.
Check or Replace batteries. Some swelling in Gel
Batteries is normal.
Batteries are leak-
ing, (wet lead acid
type).
Overcharged or loose caps.
Check and Replace batteries.
SYMPTOM
PROBABLE CAUSE
SOLUTIONS
Batteries draw excessive current-
when charging.
Battery failure.
Electrical malfunction.
Check batteries for shorted cell.
Replace if necessary (Refer to Replacing
Batteries on page 119).
Contact Dealer/Invacare for Service.