Invacare MK5 NX w/ACC User manual

Service Manual
DEALER: Keep this manual. The
procedures in this manual MUST be
performed by a qualified technician.
For more information regarding
Invacare products, parts, and services,
please visit www.invacare.com
MK5™NX™Electronics
NX
NX-B
NX-LP
NX-50
NX-75
NX w/ACC

USEFUL TERMS
MK5™NX™Electronics 2Part No 1110532
 WARNING
A QUALIFIED TECHNICIAN MUST PERFORM THE INITIAL SET UP
OF THIS WHEELCHAIR. ALSO, A QUALIFIED TECHNICIAN MUST
PERFORM ALL PROCEDURES IN THE SERVICE MANUAL.
WHEELCHAIR USERS: DO NOT SERVICE OR OPERATE THIS
EQUIPMENT WITHOUT FIRST READING AND UNDERSTANDING
(1) THE OWNER’S OPERATOR AND MAINTENANCE MANUAL
AND (2) THE SEATING SYSTEM MANUAL (IF APPLICABLE). IF
YOU ARE UNABLE TO UNDERSTAND THE WARNINGS,
CAUTIONS, AND INSTRUCTIONS, CONTACT INVACARE
TECHNICAL SUPPORT BEFORE ATTEMPTING TO SERVICE OR
OPERATE THIS EQUIPMENT - OTHERWISE INJURY OR DAMAGE
MAY RESULT.
DEALERS AND QUALIFIED TECHNICIANS: DO NOT SERVICE OR
OPERATE THIS EQUIPMENT WITHOUT FIRST READING AND
UNDERSTANDING (1) THE OWNER’S OPERATOR AND
MAINTENANCE MANUAL, (2) THE SERVICE MANUAL (IF
APPLICABLE) AND (3) THE SEATING SYSTEM MANUAL (IF
APPLICABLE). IF YOU ARE UNABLE TO UNDERSTAND THE
WARNINGS, CAUTIONS AND INSTRUCTIONS, CONTACT
INVACARE TECHNICAL SUPPORT BEFORE ATTEMPTING TO
SERVICE OR OPERATE THIS EQUIPMENT - OTHERWISE, INJURY
OR DAMAGE MAY RESULT.
USEFUL TERMS
The following acronyms are used throughout this manual:
ACRONYM DEFINITION
SPJ Single Purpose Joystick
CSPJ Composite Single Purpose Joystick
ACC Accessory
NX AND NX-50 Non-Expandable
NX-LP Non-Expandable Limited Programming
NX-B Non-Expandable with Alternate Standard Program
NX-75 Non-Expandable with 75 Amps
RWD Rear Wheel Drive
CWD Center Wheel Drive
DCI Drive Control Input
NOTE: Updated versions of this manual are available on www.invacare.com.

TABLE OF CONTENTS
Part No 1110532 3MK5™NX™Electronics
TABLE OF CONTENTS
USEFUL TERMS ................................................................................. 2
SPECIAL NOTES ................................................................................ 5
SECTION 1—GENERAL GUIDELINES ................................................... 6
Accessories ..................................................................................................................................................6
Operation Information..............................................................................................................................6
Repair or Service ........................................................................................................................................7
Sip n’ Puff (Pneumatic) Controls.............................................................................................................8
SECTION 2—EMI INFORMATION ....................................................... 9
SECTION 3—TROUBLESHOOTING .................................................... 11
All Power Wheelchairs ...........................................................................................................................11
Wheelchairs With Elevate Systems......................................................................................................12
SECTION 4—JOYSTICK DESCRIPTIONS ............................................. 13
SPJ™and CSPJ™Joystick Switches and Indicators............................................................................13
On/Off Switch.......................................................................................................................................13
SPJ Joysticks .....................................................................................................................................13
CSPJ Joysticks ..................................................................................................................................13
Speed Control Knob ...........................................................................................................................14
Joystick....................................................................................................................................................14
Charger/Programming Input..............................................................................................................14
Information Gauge Display ................................................................................................................14
SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators .................................................................17
On/Off Button ......................................................................................................................................18
Speedometer.........................................................................................................................................18
Speed Control Buttons.......................................................................................................................18
Mode Button .........................................................................................................................................18
Joystick....................................................................................................................................................19
Charger/Programming Input..............................................................................................................19
Service Indicator...................................................................................................................................19
Information Gauge Display ................................................................................................................19

TABLE OF CONTENTS
MK5™NX™Electronics 4Part No 1110532
TABLE OF CONTENTS
SECTION 5—PERFORMANCE ADJUSTMENTS .................................... 21
Main Menu..................................................................................................................................................21
Performance Adjust Menu......................................................................................................................21
NX, NX-50, NX-75, NX w/ACC, and NX-B ...............................................................................21
NX-LP.....................................................................................................................................................22
Making Performance Adjustments........................................................................................................22
NX, NX-50, NX-75, NX w/ACC, and NX-B Controller ..........................................................24
Flowchart .........................................................................................................................................24
Performance Menu Description .................................................................................................25
NX-LP Controller................................................................................................................................26
Flowchart .........................................................................................................................................26
Performance Menu Description .................................................................................................27
SECTION 6—REMOTE PROGRAMMER .............................................. 28
Overview....................................................................................................................................................28
Remote Programmer Terminology ......................................................................................................29
Function..................................................................................................................................................29
Value .......................................................................................................................................................29
Program (Preset Programs with Standard Value Settings).........................................................29
Temporary Memory............................................................................................................................29
User Memory Values...........................................................................................................................29
Description Of Remote Programmer Keys .......................................................................................30
SECTION 7—PROGRAMS ................................................................. 31
Program Settings.......................................................................................................................................31
SECTION 8—OTHER FUNCTIONS ..................................................... 35
Description of Other Functions............................................................................................................35
SECTION 9—DIAGNOSTIC CODES .................................................... 36
What Are Diagnostics Codes? ..............................................................................................................36
SECTION 10—CONNECTOR DESCRIPTIONS ...................................... 39
Controller Connector Descriptions....................................................................................................39
NX, NX-50, NX-75, NX-B and NX-LP..........................................................................................39
NX w/ACC............................................................................................................................................39
Battery Connector Pinout .................................................................................................................40
Motor Connector Pinout...................................................................................................................40
Joystick Connector Pinout.................................................................................................................40
Drive Control Input (DCI) ................................................................................................................40
NX, NX-50, NX-75, NX-B, and NX-LP ...................................................................................41
NX w/ACC ......................................................................................................................................41
Battery Charger Port ..........................................................................................................................41
LIMITED WARRANTY ..................................................................... 44

SPECIAL NOTES
Part No 1110532 5MK5™NX™Electronics
SPECIAL NOTES
Signal words are used in this manual and apply to hazards or unsafe practices which
could result in personal injury or property damage. Refer to the table below for
definitions of the signal words.
NOTICE
THE INFORMATION CONTAINED IN THIS DOCUMENT IS SUBJECT TO
CHANGE WITHOUT NOTICE.
THIS MANUAL PERTAINS TO ONLY MK5 ELECTRONICS.
 DANGER
Risk of Death, Serious Injury, or Damage
Continued use of the wheelchair that is not set to the correct specifications may
cause erratic behavior of the wheelchair resulting in death, serious injury, or
damage.
Performance adjustments should only be made by professionals of the healthcare
field or persons fully conversant with this process and the driver's capabilities.
After the wheelchair has been set up/adjusted, check to make sure that the
wheelchair performs to the specifications entered during the set up procedure. If
the wheelchair does not perform to specifications, turn the wheelchair Off
immediately and reenter set up specifications. Contact Invacare, if wheelchair still
does not perform to correct specifications.
 DANGER
Risk of Death, Serious Injury, or Damage
Corroded electrical components due to water, liquid exposure, or incontinent users
can result in death, serious injury, or damage.
Minimize exposure of electrical components to water and/or liquids. Electrical
components damaged by corrosion MUST be replaced immediately.
Wheelchairs that are used by incontinent users and/or are frequently exposed to
water/liquids may require replacement of electrical components more frequently.
SIGNAL WORD MEANING
DANGER
Danger indicates an imminently hazardous situation which, if not avoided
will result in death or serious injury.
WARNING
Warning indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
Caution indicates a potentially hazardous situation which, if not avoided,
may result in property damage.

SECTION 1—GENERAL GUIDELINES
MK5™NX™Electronics 6Part No 1110532
SECTION 1—GENERAL GUIDELINES
 DANGER
Risk of Death, Serious Injury or Damage
Improper use of this product may cause injury or damage
If you are unable to understand the warnings, cautions or instructions, contact a
health care professional or dealer before attempting to use this equipment.
DO NOT use this product or any available optional equipment without first com-
pletely reading and understanding these instructions and any additional instruc-
tional material such as user manual, service manuals or instruction sheets supplied
with this product or optional equipment.
Accessories
 WARNING
Risk of Serious Injury or Damage
Use of non-Invacare accessories may result in serious injury or damage.
Invacare products are specifically designed and manufactured for use in conjunction
with Invacare accessories. Accessories designed by other manufacturers have not
been tested by Invacare and are not recommended for use with Invacare products.
DO NOT use non-Invacare accessories.
To obtain Invacare accessories, contact Invacare by phone or at www.invacare.com.
Operation Information
 WARNING
DO NOT use the wheelchair if the joystick boot is torn or cracked. If the joystick
boot becomes torn or cracked, replace IMMEDIATELY.
If the joystick knob is missing, DO NOT use the wheelchair. In case of a fall, the
exposed stem could cause serious personal injury.
Periodically inspect the joystick and joystick cable for damage. Joystick cable MUST
be routed and secured properly to ensure that cable does not become entangled
and damaged/pinched during normal operation of wheelchair. If the joystick and/or
cable is damaged, DO NOT use the wheelchair.
If the joystick knob does not return back to the neutral position, DO NOT use the
wheelchair.

SECTION 1—GENERAL GUIDELINES
Part No 1110532 7MK5™NX™Electronics
 DANGER
Risk of Death or Serious Injury
Electric shock can cause death or serious injury
To avoid electric shock, inspect plug and cord for cuts and/or frayed wires. Replace
cut cords or frayed wires immediately.
 WARNING
Risk of Serious Injury or Damage
Moving the seating system from the factory setting may reduce driver control,
wheelchair stability, traction and increase caster wear resulting in serious injury or
damage.
Move the seating system ONLY when necessary to fit the wheelchair to the user.
If the seating system must be moved, ALWAYS inspect the wheelchair to ensure
the front rigging DOES NOT interfere with the front casters.
If the seating system must be moved, ALWAYS inspect to ensure the wheelchair
DOES NOT easily tip forward or backward.
Repair or Service
 WARNING
Setup of the Electronics Control Unit is to be performed only by a qualified
technician. The adjustments of the controller may affect other activities of the
wheelchair. Damage to the equipment could occur if improperly set-up or adjusted.
 WARNING
Risk of Serious Injury or Damage
Improperly connecting the motor leads to the controller may cause injury or
damage.
WHEELCHAIRS WITH G-TRAC: Crossing the motor leads (for example:
connecting the left motor lead into the right motor connector on the controller)
may result in unintended movement.
DO NOT cross the motor leads when connecting the motors to the controller -
otherwise injury or damage may occur.
 WARNING
Risk of Death, Serious Injury, or Damage
Improperly connected joystick could cause loss of power resulting in death, serious
injury, or damage.
Ensure the joystick is securely connected to controller.

SECTION 1—GENERAL GUIDELINES
MK5™NX™Electronics 8Part No 1110532
 DANGER
Risk of Death, Serious Injury or Damage
Use of incorrect or improper replacement (service) parts may cause death, serious
injury, or damage.
Replacement parts MUST match original Invacare parts.
ALWAYS provide the wheelchair serial number to assist in ordering the correct
replacement parts.
Sip n’ Puff (Pneumatic) Controls
 WARNING
Risk of injury or damage
Improper mounting or maintenance of the Sip n’ Puff control including the
mouthpiece and breath tube may cause injury or damage.
Water inside the Sip n’ Puff interface module may cause damage to the unit.
Excessive saliva residue in the mouthpiece/straw can reduce performance.
Blockages, a clogged saliva trap or air leaks in the system may cause Sip n’ Puff not
to function properly.
Ensure moving parts of the wheelchair, including the operation of powered seating,
DO NOT pinch or damage the Sip n’ Puff tubing.
Saliva trap MUST be installed to reduce risk of water or saliva entering the Sip n’
Puff interface module.
Occasionally flush the mouthpiece to remove saliva residue.
The mouthpiece/straw MUST be completely dry before installation.
If Sip n’ Puff does not to function properly, inspect system for blockages, clogged
saliva trap or air leaks. As necessary, replace mouthpiece, breath tube and saliva
trap.

SECTION 2—EMI INFORMATION
Part No 1110532 9MK5™NX™Electronics
SECTION 2—EMI INFORMATION
 WARNING
CAUTION: IT IS VERY IMPORTANT THAT YOU READ THIS INFORMATION
REGARDING THE POSSIBLE EFFECTS OF ELECTROMAGNETIC
INTERFERENCE ON YOUR POWERED WHEELCHAIR.
Electromagnetic Interference (EMI) From Radio Wave Sources
Powered wheelchairs and motorized scooters (in this text, both will be referred to
as powered wheelchairs) may be susceptible to electromagnetic interference (EMI),
which is interfering electromagnetic energy (EM) emitted from sources such as
radio stations, TV stations, amateur radio (HAM) transmitters, two way radios, and
cellular phones. The interference (from radio wave sources) can cause the powered
wheelchair to release its brakes, move by itself, or move in unintended directions. It
can also permanently damage the powered wheelchair's control system. The
intensity of the interfering EM energy can be measured in volts per meter (V/m).
Each powered wheelchair can resist EMI up to a certain intensity. This is called its
"immunity level." The higher the immunity level, the greater the protection. At this
time, current technology is capable of achieving at least a 20 V/m immunity level,
which would provide useful protection from the more common sources of radiated
EMI.
There are a number of sources of relatively intense electromagnetic fields in the
everyday environment. Some of these sources are obvious and easy to avoid.
Others are not apparent and exposure is unavoidable. However, we believe that by
following the warnings listed below, your risk to EMI will be minimized.
The sources of radiated EMI can be broadly classified into three types:
1) Hand-held Portable transceivers (transmitters-receivers with the antenna
mounted directly on the transmitting unit. Examples include: citizens band (CB)
radios, "walkie talkie", security, fire and police transceivers, cellular telephones,
and other personal communication devices).
NOTE: Some cellular telephones and similar devices transmit signals while they are ON,
even when not being used.
2) Medium-range mobile transceivers, such as those used in police cars, fire trucks,
ambulances and taxis. These usually have the antenna mounted on the outside of
the vehicle; and
3) Long-range transmitters and transceivers, such as commercial broadcast
transmitters (radio and TV broadcast antenna towers) and amateur (HAM)
radios.
NOTE: Other types of hand-held devices, such as cordless phones, laptop computers,
AM/FM radios, TV sets, CD players, cassette players, and small appliances, such as elec-
tric shavers and hair dryers, so far as we know, are not likely to cause EMI problems to
your powered wheelchair.

SECTION 2—EMI INFORMATION
MK5™NX™Electronics 10 Part No 1110532
 WARNING
Powered Wheelchair Electromagnetic Interference (EMI)
Because EM energy rapidly becomes more intense as one moves closer to the
transmitting antenna (source), the EM fields from hand-held radio wave sources
(transceivers) are of special concern. It is possible to unintentionally bring high
levels of EM energy very close to the powered wheelchair's control system while
using these devices. This can affect powered wheelchair movement and braking.
Therefore, the warnings listed below are recommended to prevent possible
interference with the control system of the powered wheelchair.
Electromagnetic interference (EMI) from sources such as radio and TV stations,
amateur radio (HAM) transmitters, two-way radios, and cellular phones can affect
powered wheelchairs and motorized scooters.
FOLLOWING THE WARNINGS LISTED BELOW SHOULD REDUCE THE
CHANCE OF UNINTENDED BRAKE RELEASE OR POWERED WHEELCHAIR
MOVEMENT WHICH COULD RESULT IN SERIOUS INJURY.
1) Do not operate hand-held transceivers (transmitters receivers), such as citizens
band (CB) radios, or turn ON personal communication devices, such as cellular
phones, while the powered wheelchair is turned ON;
2) Be aware of nearby transmitters, such as radio or TV stations, and try to avoid
coming close to them;
3) If unintended movement or brake release occurs, turn the powered wheelchair
OFF as soon as it is safe;
4) Be aware that adding accessories or components, or modifying the powered
wheelchair, may make it more susceptible to EMI (NOTE: There is no easy way
to evaluate their effect on the overall immunity of the powered wheelchair); and
5) Report all incidents of unintended movement or brake release to the powered
wheelchair manufacturer, and note whether there is a source of EMI nearby.
Important Information
1) 20 volts per meter (V/m) is a generally achievable and useful immunity level
against EMI (as of May 1994) (the higher the level, the greater the protection).
2) This device has been tested to a radiated immunity level of 20 volts per meter.
3) The immunity level of the product is unknown.
Modification of any kind to the electronics of this wheelchair as manufactured by
Invacare may adversely affect the EMI immunity levels.

SECTION 3—TROUBLESHOOTING
Part No 1110532 11 MK5™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 35 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.

SECTION 3—TROUBLESHOOTING
MK5™NX™Electronics 12 Part No 1110532
Wheelchairs With Elevate Systems
SYMPTOM PROBABLE CAUSE SOLUTIONS
Seating system not functioning
or working intermittently.
Low batteries. Charge batteries. Refer to the seating system
Owner’s Manual.
Faulty electrical
connection.
Check all connections.
Blown fuse. Replace wiring harness. Refer to the seating system
Owner’s Manual.
Seat has been driven
under a heavy load for an
extended period of time.
Allow time for the electronics to cool down (Light
Duty Use). Leave power on, and do not activate
powered seating functions for at least 3 minutes.
Open Motor connection/
Motor locks disengaged.
Check all motor connectors.
Make sure motor locks are engaged.
Wheelchair slows while driving. Elevating seat is elevated.
The elevating seat is
equipped with a speed
reduction safety
mechanism. While the
seat is in an elevated
position, the safety
feature slows the speed
of the wheelchair by 80%.
Return the seat to its lowest position. Refer to the
seating system Owner’s Manual.
Wheelchair drives at full speed
when seat is elevated.
Faulty electrical
connection.
Check all connectors.
Malfunctioning seating
system controller.
Check for error codes. Refer to Performance
Adjustments on page 21 for the correct perfor-
mance adjustment menu descriptions. Replace seat-
ing system controller, if necessary. Contact
Invacare.

SECTION 4—JOYSTICK DESCRIPTIONS
Part No 1110532 13 MK5™NX™Electronics
SECTION 4—JOYSTICK
DESCRIPTIONS
SPJ™and CSPJ™Joystick Switches and Indicators
NOTE: For the following information, refer to FIGURE 4.1.
FIGURE 4.1 SPJ™and CSPJ™Joystick Switches and Indicators
On/Off Switch
SPJ Joysticks
This toggle switch is located at the rear of the joystick housing.
CSPJ Joysticks
This button is located on top of the joystick housing at the rear of the joystick.
Joystick
Speed Control Knob
On/Off
Toggle Switch
Charger/
Programming Input
To Controller
Joystick
Information
Gauge On/Off
Button
To Controller
Multi-Function
Charger Port
Horn
Speed
Control Knob
CSPJ Joystick
SPJ Joystick

SECTION 4—JOYSTICK DESCRIPTIONS
MK5™NX™Electronics 14 Part No 1110532
Speed Control Knob
The speed control knob is located on the back of the joystick housing. This rotary switch
is used for controlling the speed and acceleration of the wheelchair.
1. Turn the switch clockwise to increase the speed of the wheelchair.
2. Turn the switch counterclockwise to decrease the speed of the wheelchair.
Joystick
The joystick has proportional drive control, meaning that further the joystick is pushed
from the upright (neutral) position, the faster the wheelchair moves. Your top speed,
however, is limited by the setting of the speed-control knob and programmed settings.
To slow the wheelchair to a stop, simply release the joystick. The wheelchair has
automatic speed and direction compensation to minimize corrections.
Charger/Programming Input
Located at the front of the joystick housing. This provides easy access for charging the
wheelchair batteries. This port also serves as the Remote Programmer Communication
connection.
Information Gauge Display
The Information Gauge Display is located on the front of the joystick housing. It provides
the following information to the user on the status of the wheelchair -
1. Power is on.
2. True state-of-battery-charge, including notification of when the battery requires
charging:
A. GREEN LED is lit, indicating well charged batteries.
B. Only AMBER LEDs are lit, indicating batteries are moderately charged. Recharge
batteries before taking a long trip.
C. Only RED LED is lit, indicating batteries are running out of charge. Recharge
batteries as soon as possible.
3. Program, inhibit or charge modes.
4. Fault indication (Flash Codes).
The Information Gauge display also serves as a system diagnostic device when a fault is
detected by the control module. A specific number of flashes of the LEDs indicate the
type of fault detected. Refer to the following table of the diagnostic indications of the
wheelchair status.

SECTION 4—JOYSTICK DESCRIPTIONS
Part No 1110532 15 MK5™NX™Electronics
SPJ Diagnostic Indications of Wheelchair Status
DISPLAY DESCRIPTION DEFINITION COMMENTS
All three LEDs are off. Power is Off.
All three LEDs are on. Power is On. Fewer than three LEDs on
implies reduced battery
charge.
RED LED is flashing. Battery charge is low. The batteries should be
charged as soon as possi-
ble.
Left to Right “chase” alter-
nating with steady display.
Joystick is in program-
ming, inhibit and/or charg-
ing mode.
The steady LEDs indicate
the current state of the
battery charge.
GREEN LED is flashing. Joystick is in Speed Limit
mode.
The current state of bat-
tery charge will be dis-
played at the same time.
All LEDs are flashing slowly. Joystick has detected Out-
of-Neutral-at-Power-Up
mode.
Release the joystick back
to Neutral.
All LEDs are flashing
quickly.
Joystick has detected a
fault.
Joystick uses Flash codes
to indicate faults.
INVACARE
INVACARE
INVACARE
INVACARE
INVACARE
INVACARE
INVACARE

SECTION 4—JOYSTICK DESCRIPTIONS
MK5™NX™Electronics 16 Part No 1110532
CSPJ Diagnostic Indications of Wheelchair Status
DISPLAY DESCRIPTION DEFINITION COMMENTS
All LEDs are off. Power is Off.
All LEDs are on. Power is On. Fewer than three LEDs on
implies reduced battery
charge.
Left RED LED is flashing. Battery charge is low. The batteries should be
charged as soon as possi-
ble.
Left to Right “chase” alter-
nating with steady display.
Joystick is in program-
ming, inhibit and/or charg-
ing mode.
The steady LEDs indicate
the current state of the
battery charge.
Right GREEN LED is flash-
ing.
Joystick is in Speed Limit
mode.
The current state of bat-
tery charge will be dis-
played at the same time.
All LEDs are flashing slowly. Joystick has detected Out-
of-Neutral-at-Power-Up
mode.
Release the joystick back
to Neutral.
All LEDs are flashing
quickly.
Joystick has detected a
fault.
Joystick uses Flash codes
to indicate faults. Refer to
the electronics manual
(Part Number 1110532).

SECTION 4—JOYSTICK DESCRIPTIONS
Part No 1110532 17 MK5™NX™Electronics
SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators
NOTE: For this procedure, refer to FIGURE 4.2.
FIGURE 4.2 SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators
On/Off
Button
DETAIL “A” -
FRONT VIEW
Charger/
Programming
Input
Speedometer
Joystick
GREEN
LED
Information
Gauge
Display
Service Indicator
Decrease
Speed Button
(Tortoise) Increase
Speed Button
(Hare)
Mode Button
SPJ+ w/ACC Joystick
On/Off
Button
DETAIL “A” -
FRONT VIEW
Charger/
Programming
Input
Speedometer
Joystick
GREEN
LED
Information
Gauge
Display
Service Indicator
Decrease
Speed Button
(Tortoise) Increase
Speed Button
(Hare)
SPJ+ Joystick

SECTION 4—JOYSTICK DESCRIPTIONS
MK5™NX™Electronics 18 Part No 1110532
On/Off Button
This button is located at the front of the joystick housing. It is used to turn the wheelchair
on and off, to remove the joystick from sleep mode (if programmed) and to lock or unlock
the joystick (if programmed).
Speedometer
The speedometer is used to show the maximum speed. The right-most LED indicates
current maximum speed setting. The bottom left GREEN LED flashes to indicate that the
joystick is in speed limit mode. Speed limit mode limits the drive speed to a pre-
programmed value, typically when the seat has been elevated and the wheelchair is
required to drive at 20% speed.
Speed Control Buttons
The speed control buttons (tortoise button ( ) and hare button ( )) are used to set and
adjust the maximum speed.
1. To adjust the speed, perform one of the following:
• Adjust Speed in 20% Increments (5 Speed Mode) - Press the tortoise button ( )
or hare button ( ) to decrease/increase the speed in 20% increments. The larger
bars in the speedometer will light.
• Adjust Speed in Smaller Increments (VSP Mode) - Perform the following steps:
i. Press and hold both the tortoise button ( ) and hare button ( ) until the
joystick beeps.
ii. Perform one of the following:
• Press the tortoise button ( ) or hare button ( ) to decrease/increase the
speed in 20% increments. The larger bars in the speedometer will light.
• Press and hold the tortoise button ( ) or hare button ( ) to decrease/
increase the speed in smaller increments. The smaller bars in the
speedometer will light.
Mode Button
NOTE: The mode button is present on the SPJ+ w/ACC joystick only.
Press the mode button to switch from driving mode to elevate mode. Refer to the
wheelchair owner’s manual for elevating seat operating instructions.

SECTION 4—JOYSTICK DESCRIPTIONS
Part No 1110532 19 MK5™NX™Electronics
Joystick
The joystick has proportional drive control, meaning that further the joystick is pushed
from the upright (neutral) position, the faster the wheelchair or seat moves. Your top
speed, however, is limited by the programmed settings.
To slow the wheelchair to a stop, simply release the joystick. The wheelchair has
automatic speed and direction compensation to minimize corrections.
Charger/Programming Input
The charger/programming input is located at the front of the joystick housing. This
provides easy access for charging the wheelchair batteries. This port also serves as the
Remote Programmer Communication connection. Driving is prevented while the system
is charging.
Service Indicator
The AMBER service indicator will light when an error or fault occurs. Refer to Diagnostic
Codes on page 36 for a listing of the flash codes and what they indicate.
Information Gauge Display
Located on the front of the joystick housing, it provides the following information to the
user on the status of the wheelchair -
1. Power is on.
2. True state-of-battery-charge, including notification of when the battery requires
charging:
A. GREEN LEDs are lit, indicating well charged batteries.
B. AMBER LEDs are lit, indicating batteries are moderately charged. Recharge
batteries before taking a long trip.
C. RED LEDs are lit, indicating batteries are running out of charge. Recharge batteries
as soon as possible.
The Information Gauge display also serves as a system diagnostic device when a fault is
detected by the control module. A specific number of flashes of the LEDs indicate the type
of fault detected. Refer to the table for the diagnostic indications of the wheelchair status.

SECTION 4—JOYSTICK DESCRIPTIONS
MK5™NX™Electronics 20 Part No 1110532
INFORMATION
GAUGE
DISPLAY
DESCRIPTION DEFINITION COMMENTS
All LEDs are off. Power is off.
All LEDs are on. Power is on. Fewer than three LEDs on
implies reduced battery charge.
Left RED LED is flashing. Battery charge is low. The batteries should be
charged as soon as possible.
Left to Right “chase”
alternating with steady
display.
Joystick is in
programming, inhibit and/
or charging mode.
The steady LEDs indicate the
current state of the battery
charge.
All LEDs are flashing slowly. Joystick has detected Out-
of-Neutral-at-Power-Up
mode.
Release the joystick back to
Neutral.