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SAFETY INSPECTION/TROUBLESHOOTING
PROCEDURE 2
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TROUBLESHOOTING - ELECTRICAL
NOTE: For additional troubleshooting information and explanation of error codes, refer to the individual CONTROLLER MANUAL
supplied with each wheelchair.
SYMPTOM
Batteries draw excessive current
when charging.
Battery indicator flashes the charge
level is low—immediately after re-
charge.
Battery indicator flashes the charge
level is low—too soon after being
recharged.
Motor “chatters” or runs irregular.
Wheelchair does not respond to
commands. Power "ON", battery
indicator flashes.
Only one (1) rear wheel turns.
Joystick erratic or does not respond
as desired.
Wheelchair does not respond to
commands. Power indicator OFF—
even after recharging.
SOLUTIONS
Check batteries for shorted cell. Replace if neces-
sary (PROCEDURE 8).
Contact Dealer/Invacare for Service.
Check batteries for shorted cell. Replace if neces-
sary (PROCEDURE 8).
Contact Dealer/Invacare for Service.
Poor connections between charger and wheel-
chair. Contact Dealer/Invacare for Service.
Have charger checked.
Replace batteries if necessary (PROCEDURE 8).
Contact Dealer/Invacare for Service.
Contact Dealer/Invacare for Service.
Engage motor locks/clutches (PROCEDURE 12).
Contact Dealer/Invacare for Service.
Engage motor lock/clutch (PROCEDURE12).
Contact Dealer/Invacare for Service.
Reprogram controller (Refer to MCC-MKIV con-
troller manual supplied with wheelchair).
Clean terminals (PROCEDURE 8).
Contact Dealer/Invacare for Service.
PROBABLE CAUSE
Battery failure.
Electrical malfunction.
Battery failure.
Malfunctioning battery charger.
Electrical malfunction.
Batteries not charged.
Weak batteries.
Electrical malfunction.
Electrical malfunction.
One (1) or both motor locks/clutches dis-
engaged.
Electrical malfunction.
One (1) motor lock/clutch is disengaged.
Electrical malfunction.
Controller Programed improperly.
Poor battery terminal connection.
Electrical malfunction.
TROUBLESHOOTING - MECHANICAL
SOLUTIONS
If pneumatic, check tires for cor-
rect and equal pressure.
Check for loose stem nuts/bolts.
Check that both casters contact
ground at the same time.
CHAIR 3
WHEELS
X
LOOSENESS
IN CHAIR
X
SQUEAKS AND
RATTLES
X
CASTERS
FLUTTER
X
X
X
SLUGGISH TURN/
PERFORMANCE
X
X
CHAIR VEERS
LEFT/RIGHT
X
X
X
Don’t perform any installation or maintenance
without first reading this manual.
Don’t perform installation or maintenance of
batteries in an area that could be damaged by
battery spills.
Don’t make it a habit to discharge batteries to
the lowest level.
Don’t use randomly chosen batteries/chargers.
Don’t put new batteries into service before
charging.
Read and understand this manual and any service information that accompa-
nies a battery and charger before operating the wheelchair.
Move the wheelchair to a work area before checking the fluid level, adding dis-
tilled water, cleaning terminals, or opening battery box.
Recharge as frequently as possible to maintain a high charge level and extend
battery life.
Follow recommendations in this manual when selecting a battery or charger.
Fully charge a new battery before using.
DON’T
DO
CHECKING BATTERY CHARGE LEVEL (FIGURE 1)
WARNING
Invacare recommends that the following procedures be performed by a qualified service technician.
The following “Do’s” and “Don’ts” are provided for your convenience and safety.
