Section 3-Troubleshooting; All Power Wheelchairs - Invacare MK5 NX Service Manual

SECTION 3—TROUBLESHOOTING

All Power Wheelchairs

SYMPTOM
Error Code E03 or E04,
3 or 4 flashes of joystick
LEDs.
Error Code E02, 2 flashes
of joystick LEDs.
Joystick erratic or does
not respond as desired.
Wheelchair veers to the
left or right when driving
on level surface.
No LED's on joystick.
Corroded wiring or
connections.
Wheelchair does not
respond to commands.
Power indicator off - even
after recharging.
Part No 1110532
PROBABLE CAUSE
Motor lock levers disengaged.
Bad motor connection.
Bad brake coil
Batteries need to be charged.
Damaged motor coupling.
Electrical malfunction.
Controller programmed
improperly.
Joystick needs to be calibrated.
Joystick connection to
controller unplugged or
damaged.
Possible water, salt, or urine
damage.
Poor battery terminal
connection.
Bad joystick connection.
Bad wiring harness connection
or blown fuse.
Battery charger connected to
joystick.
Electrical malfunction.
SECTION 3—TROUBLESHOOTING
SOLUTIONS
Engage motor lock levers. Refer to the wheelchair
Owner's Manual for more information.
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.
Ohm out brake connection. Normal reading is 40-
80 Ohms.
Charge batteries. Refer to the wheelchair Owner's
Manual for charging instructions.
Contact Dealer/Invacare for Service.
Contact Dealer/Invacare for Service.
Contact Dealer/Invacare to have controller
reprogrammed.
Calibrate joystick with programmer. If this does not
work, replace joystick. Refer to Joystick Throw on
page 35 for calibration information.
Check all joystick connections. Refer to wheelchair
Owner's Manual. If damage is found, replace
joystick.
Replace wiring harness. Refer to wheelchair
Owner's Manual.
Have clean terminals. Refer to wheelchair Owner's
Manual.
Check all joystick connections. Refer to wheelchair
Owner's Manual.
Replace wiring harness. Refer to wheelchair
Owner's Manual.
Unplug battery charger.
Contact Invacare.
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MK ™NX™Electronics
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