SECTION 4—SAFETY INSPECTION/TROUBLESHOOTING
Part No 1122170
21
Formula™ Powered Seating
SPM Battery Fault displays and the
wheelchair does not drive.
Batteries need to be charged
(Error code E14).
Charge batteries. If batteries fail to
charge properly, check battery charger
or replace batteries. Refer to Replacing
Batteries on page 63.
JOYSTICK TIMEOUT displays and
the wheelchair does not drive.
Joystick or input device is
disconnected (Error code 32).
Turn off power, reconnect the joystick
of input device and turn power on.
JS REV TOO LARGE
JS FWD TOO LARGE
JS LFT TOO LARGE or
JS RGT TOO LARGE
displays and the wheelchair does not
drive.
The joystick or input device is
sending a value outside of the
reverse, forward, left or right
limits (Error codes E01, E02,
E03 or E04).
Replace joystick or input device.
NEUTRAL TESTING displays.
The joystick neutral test has
failed (Error code E18).
Release the joystick and try to get the
joystick back into the center-most
position.
BAD JOYSTICK CAL VALUES
displays and the wheelchair does not
drive.
The joystick calibration values
are outside of the expected
range (Error code E19).
Contact Dealer/Invacare for
recalibration of the joystick (joystick
throw procedure).
SPM NOT CONNECTED
The MPJ or Display module is
not communicating with the
control module (Error code
E200).
Check the connections between the
joystick or display and the controller.
Turn the power off and then back on.
Replace the controller if necessary.
SPM Communications Fault
displays and the wheelchair drives
slowly.
The controller has determined a
fault during a previous turn-off
process (Error code E41).
Turn the wheelchair off and back on.
ATTENDANT ACTIVE and
displays.
The Proportional or Digital
Attendant control is active and
can be used to drive the chair
(Error code W05).
This is normal behavior.
Batteries draw excessive current
when charging.
Battery failure.
Electrical malfunction.
Have batteries checked for shorted cell.
Replace if necessary.
Contact Dealer/Invacare for service.
Battery indicator flashes the charge
level is low - immediately after
recharge.
Battery failure.
Malfunctioning battery charger.
Electrical malfunction.
Check batteries for shorted cell.
Replace if necessary.
Contact Dealer/Invacare for Service.
Contact Dealer/Invacare for Service.
Battery indicator flashes the charge
level is low - too soon after being
recharged.
Batteries not charged.
Weak batteries.
Have charger checked.
Replace batteries if necessary. Refer to
Replacing Batteries on page 63.
Motor “chatters” or runs irregular.
Electrical malfunction.
Contact Dealer/Invacare for Service.
SYMPTOM
PROBABLE CAUSE
SOLUTIONS
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