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SECTION 3—TROUBLESHOOTING
Part No 1110532 9 MK
5
™NX™Electronics
SECTION 3—TROUBLESHOOTING
All Power Wheelchairs
SYMPTOM PROBABLE CAUSE SOLUTIONS
Error Code E03 or E04,
3 or 4 flashes of joystick
LEDs.
Motor lock levers disengaged. Engage motor lock levers. Refer to the wheelchair
Owner’s Manual for more information.
Bad motor connection. Check all motor connections.
Ohm out motors. Check brushes and replace if
necessary. Replace motors if high reading is present.
Normal reading is 0.2-5 Ohms (4 Pole motors) or
0.5-5 Ohms (2 Pole motors). Refer to wheelchair
Service Manual.
Bad brake coil Ohm out brake connection. Normal reading is 40-
80 Ohms.
Error Code E02, 2 flashes
of joystick LEDs.
Batteries need to be charged. Charge batteries. Refer to the wheelchair Owner’s
Manual for charging instructions.
Joystick erratic or does
not respond as desired.
Damaged motor coupling. Contact Dealer/Invacare for Service.
Electrical malfunction. Contact Dealer/Invacare for Service.
Controller programmed
improperly.
Contact Dealer/Invacare to have controller
reprogrammed.
Wheelchair veers to the
left or right when driving
on level surface.
Joystick needs to be calibrated. Calibrate joystick with programmer. If this does not
work, replace joystick. Refer to Joystick Throw
on
page 33 for calibration information.
No LED’s on joystick. Joystick connection to
controller unplugged or
damaged.
Check all joystick connections. Refer to wheelchair
Owner’s Manual. If damage is found, replace
joystick.
Corroded wiring or
connections.
Possible water, salt, or urine
damage.
Replace wiring harness. Refer to wheelchair
Owner’s Manual.
Wheelchair does not
respond to commands.
Poor battery terminal
connection.
Have clean terminals. Refer to wheelchair Owner’s
Manual.
Bad joystick connection. Check all joystick connections. Refer to wheelchair
Owner’s Manual.
Bad wiring harness connection
or blown fuse.
Replace wiring harness. Refer to wheelchair
Owner’s Manual.
Battery charger connected to
joystick.
Unplug battery charger.
Power indicator off - even
after recharging.
Electrical malfunction. Contact Invacare.