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Service Manual

MK5™NX™Electronics
NX
NX-B
NX-LP
NX-50
NX-75
NX w/ACC

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

USEFUL TERMS

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
SPJ
CSPJ
ACC
NX AND NX-50

DEFINITION
Single Purpose Joystick
Composite Single Purpose Joystick
Accessory
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.
MK5™NX™Electronics

Part No 1110532

TABLE OF CONTENTS

TABLE OF CONTENTS
USEFUL TERMS ................................................................................. 2
SPECIAL NOTES ................................................................................ 5
SECTION 1—GENERAL GUIDELINES ................................................... 6
Controller Settings/Repair or Service ...................................................................................................6
Operation Information ..............................................................................................................................6
SECTION 2—EMI INFORMATION ....................................................... 7
SECTION 3—TROUBLESHOOTING ...................................................... 9
All Power Wheelchairs .............................................................................................................................9
Wheelchairs With Elevate Systems......................................................................................................10
SECTION 4—JOYSTICK DESCRIPTIONS ............................................. 11
SPJ™and CSPJ™Joystick Switches and Indicators ............................................................................11
On/Off Switch.......................................................................................................................................11
SPJ Joysticks .....................................................................................................................................11
CSPJ Joysticks ..................................................................................................................................11
Speed Control Knob ...........................................................................................................................12
Joystick....................................................................................................................................................12
Charger/Programming Input..............................................................................................................12
Information Gauge Display ................................................................................................................12
SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators .................................................................15
On/Off Button ......................................................................................................................................16
Speedometer.........................................................................................................................................16
Speed Control Buttons.......................................................................................................................16
Mode Button .........................................................................................................................................16
Joystick....................................................................................................................................................17
Charger/Programming Input..............................................................................................................17
Service Indicator...................................................................................................................................17
Information Gauge Display ................................................................................................................17
SECTION 5—PERFORMANCE ADJUSTMENTS .................................... 19
Main Menu..................................................................................................................................................19
Performance Adjust Menu......................................................................................................................19
NX, NX-50, NX-75, NX w/ACC, and NX-B ...............................................................................19
NX-LP.....................................................................................................................................................20
Making Performance Adjustments........................................................................................................20
NX, NX-50, NX-75, NX w/ACC, and NX-B Controller ..........................................................22
Flowchart .........................................................................................................................................22
Performance Menu Description .................................................................................................23
NX-LP Controller................................................................................................................................24
Flowchart .........................................................................................................................................24
Performance Menu Description .................................................................................................25
Part No 1110532

MK5™NX™Electronics

TABLE OF CONTENTS

TABLE OF CONTENTS
SECTION 6—REMOTE PROGRAMMER .............................................. 26
Overview ....................................................................................................................................................26
Remote Programmer Terminology ......................................................................................................27
Function..................................................................................................................................................27
Value .......................................................................................................................................................27
Program (Preset Programs with Standard Value Settings).........................................................27
Temporary Memory ............................................................................................................................27
User Memory Values...........................................................................................................................27
Description Of Remote Programmer Keys .......................................................................................28
SECTION 7—PROGRAMS ................................................................. 29
Program Settings.......................................................................................................................................29
SECTION 8—OTHER FUNCTIONS ..................................................... 33
Description of Other Functions............................................................................................................33
SECTION 9—DIAGNOSTIC CODES .................................................... 34
What Are Diagnostics Codes? ..............................................................................................................34
SECTION 10—CONNECTOR DESCRIPTIONS ...................................... 37
Controller Connector Descriptions....................................................................................................37
NX, NX-50, NX-75, NX-B and NX-LP..........................................................................................37
NX w/ACC............................................................................................................................................37
Battery Connector Pinout .................................................................................................................38
Motor Connector Pinout...................................................................................................................38
Joystick Connector Pinout.................................................................................................................38
Drive Control Input (DCI) ................................................................................................................38
NX, NX-50, NX-75, NX-B, and NX-LP ...................................................................................39
NX w/ACC ......................................................................................................................................39
Battery Charger Port ..........................................................................................................................39
LIMITED WARRANTY ..................................................................... 40

MK5™NX™Electronics

Part No 1110532

SPECIAL NOTES

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.
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.

NOTICE
THE INFORMATION CONTAINED IN THIS DOCUMENT IS SUBJECT TO
CHANGE WITHOUT NOTICE.
THIS MANUAL PERTAINS TO ONLY MK5 ELECTRONICS.

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.

OPERATION WARNING
Performance adjustments should only be made by professionals of the health care
field or persons fully conversant with this process and the driver's capabilities.
Incorrect settings could cause injury to the driver, bystanders, damage to the
wheelchair and surrounding property. After the wheelchair has been setup, check to
make sure that the wheelchair performs to the specifications entered in the setup
procedure. If the wheelchair does not perform to specifications, turn the wheelchair
off immediately and re-enter setup specifications. Repeat this procedure until the
wheelchair performs to specifications.

WARNING
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.
Wheelchairs should be examined during maintenance for signs of corrosion (water
exposure, incontinence, etc.). Electrical components damaged by corrosion should
be replaced IMMEDIATELY.
Wheelchairs that are used by incontinent users and/or are frequently exposed to
water may require replacement of electrical components more frequently.
Part No 1110532

MK5™NX™Electronics

SECTION 1—GENERAL GUIDELINES

SECTION 1—GENERAL GUIDELINES
WARNING
SECTION 1 - GENERAL GUIDELINES contains important information for the safe
operation and use of this product. DO NOT use this product or any available
optional equipment without first completely reading and understanding these
instructions and any additional instructional material such as Owner’s Manuals,
Service Manuals or Instruction Sheets supplied with this product or optional
equipment. If you are unable to understand the Warnings, Cautions or Instructions,
contact a healthcare professional, dealer or technical personnel before attempting
to use this equipment - otherwise, injury or damage may occur.

Controller Settings/Repair or Service
Set-up of the Electronics Control Unit is to be performed only by a qualified technician.
The final adjustments of the controller may affect other activities of the wheelchair.
Damage to the equipment could occur if improperly set-up or adjusted.

Operation Information
After the wheelchair has been set-up, 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. Repeat this procedure until the wheelchair performs to specifications.
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 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.

MK5™NX™Electronics

Part No 1110532

SECTION 2—EMI INFORMATION

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 electric shavers and hair dryers, so far as we know, are not likely to cause EMI problems to
your powered wheelchair.

Part No 1110532

MK5™NX™Electronics

SECTION 2—EMI INFORMATION

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.

MK5™NX™Electronics

Part No 1110532

SECTION 3—TROUBLESHOOTING

SECTION 3—TROUBLESHOOTING
All Power Wheelchairs
SYMPTOM
Error Code E03 or E04,
3 or 4 flashes of joystick
LEDs.

PROBABLE CAUSE

SOLUTIONS

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 4080 Ohms.

Error Code E02, 2 flashes Batteries need to be charged.
of joystick LEDs.

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 Electrical malfunction.
after recharging.

Part No 1110532

Contact Invacare.

MK5™NX™Electronics

SECTION 3—TROUBLESHOOTING

Wheelchairs With Elevate Systems
SYMPTOM
Seating system not functioning
or working intermittently.

PROBABLE CAUSE

SOLUTIONS

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/ Check all motor connectors.
Motor locks disengaged.
Make sure motor locks are engaged.
Wheelchair slows while driving.

Elevating seat is elevated. Return the seat to its lowest position. Refer to the
seating system Owner’s Manual.
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%.

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 19 for the correct performance adjustment menu descriptions. Replace seating system controller, if necessary. Contact
Invacare.

MK5™NX™Electronics

Part No 1110532

SECTION 4—JOYSTICK DESCRIPTIONS

SECTION 4—JOYSTICK
DESCRIPTIONS
SPJ™and CSPJ™Joystick Switches and Indicators
NOTE: For the following information, refer to FIGURE 4.1.
SPJ Joystick

Joystick

Charger/
Programming Input

Speed Control Knob
On/Off
Toggle Switch
To Controller
CSPJ Joystick

Information
Gauge

On/Off
Button

Joystick

Horn
Multi-Function
Charger Port

Speed
Control Knob

To Controller

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.
Part No 1110532

MK5™NX™Electronics

SECTION 4—JOYSTICK DESCRIPTIONS

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.

MK5™NX™Electronics

Part No 1110532

SECTION 4—JOYSTICK DESCRIPTIONS
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 possible.

Left to Right “chase” alternating with steady display.

Joystick is in programThe steady LEDs indicate
ming, inhibit and/or charg- the current state of the
battery charge.
ing mode.

GREEN LED is flashing.

Joystick is in Speed Limit
mode.

INVACARE

The current state of battery charge will be displayed at the same time.

INVACARE

All LEDs are flashing slowly. Joystick has detected Out- Release the joystick back
of-Neutral-at-Power-Up
to Neutral.
mode.
INVACARE

All LEDs are flashing
quickly.

Joystick has detected a
fault.

Joystick uses Flash codes
to indicate faults.

INVACARE

Part No 1110532

MK5™NX™Electronics

SECTION 4—JOYSTICK DESCRIPTIONS
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 possible.

Left to Right “chase” alternating with steady display.

The steady LEDs indicate
Joystick is in programming, inhibit and/or charg- the current state of the
battery charge.
ing mode.

Right GREEN LED is flashing.

Joystick is in Speed Limit
mode.

The current state of battery charge will be displayed at the same time.

All LEDs are flashing slowly. Joystick has detected Out- Release the joystick back
to Neutral.
of-Neutral-at-Power-Up
mode.

All LEDs are flashing
quickly.

MK5™NX™Electronics

Joystick has detected a
fault.

Joystick uses Flash codes
to indicate faults. Refer to
the electronics manual
(Part Number 1110532).

Part No 1110532

SECTION 4—JOYSTICK DESCRIPTIONS

SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators
NOTE: For this procedure, refer to FIGURE 4.2.

SPJ+ Joystick

Joystick
Information
Gauge
Display

On/Off
Button
Decrease
Speed Button
(Tortoise)

Speedometer
Increase
Speed Button
(Hare)

GREEN
LED

DETAIL “A” FRONT VIEW

Charger/
Programming
Input

Service Indicator
SPJ+ w/ACC Joystick

Joystick
Information
Gauge
Display

On/Off
Button

Mode Button

Decrease
Speed Button
(Tortoise)

Speedometer
Increase
Speed Button
(Hare)

GREEN
LED

DETAIL “A” FRONT VIEW

Charger/
Programming
Input

Service Indicator

FIGURE 4.2 SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators

Part No 1110532

MK5™NX™Electronics

SECTION 4—JOYSTICK DESCRIPTIONS

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 preprogrammed 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 (
adjust the maximum speed.

) and hare button (

)) are used to set and

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 (
joystick beeps.

) and hare button (

) until the

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.

MK5™NX™Electronics

Part No 1110532

SECTION 4—JOYSTICK DESCRIPTIONS

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 34 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.

Part No 1110532

MK5™NX™Electronics

SECTION 4—JOYSTICK DESCRIPTIONS
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- Release the joystick back to
of-Neutral-at-Power-Up
Neutral.
mode.

MK5™NX™Electronics

Part No 1110532

SECTION 5—PERFORMANCE ADJUSTMENTS

SECTION 5—PERFORMANCE
ADJUSTMENTS
Main Menu
NOTE: For this procedure, refer to FIGURE 5.1.
The first display screen shown after powering on the Remote Programmer is the Main
Menu.
The main menu consists of the following options: Performance Adjust, Programs, Other.
The arrow to the left is the selection pointer. It can be moved up or down the main menu
by pressing the up or down key.
Remote
Programmer
LCD Display

➜ PERFORMANCE ADJUST
PROGRAMS
OTHER

POWER Key
MENU Key

Selection Arrow

UP Key
SELECT Key
DOWN Key

FIGURE 5.1 Main Menu

Performance Adjust Menu
NX, NX-50, NX-75, NX w/ACC, and NX-B
NOTE: For this procedure, refer to FIGURE 5.2.
The Performance Adjust Menu for NX, NX-75, NX w/ACC and NX-B consists of the
following:
Remote
Programmer

➜ FORWARD SPD
TURNING SPD
ACCELERATION - FWD
ACCELERATION - REV
TURN ACCELERATION
TURN DECELERATION
BRAKING FORWARD
BRAKING REVERSE
REVERSE SPEED
TREMOR DAMPENING
TORQUE

LCD Display

FIGURE 5.2 Performance Adjust Menu - NX, NX-50, NX-75, NX w/ACC, and NX-B

Part No 1110532

MK5™NX™Electronics

SECTION 5—PERFORMANCE ADJUSTMENTS

NX-LP
NOTE: For this procedure, refer to FIGURE 5.3.
The Performance Adjust Menu for NX-LP consists of the following:
Remote
Programmer

➜ FORWARD SPD
TURNING SPD
ACCELERATION - FWD
ACCELERATION - REV
REVERSE SPEED

LCD Display

FIGURE 5.3 Performance Adjust Menu - NX-LP

Making Performance Adjustments
WARNING

DO NOT mismatch a program with the wheelchair type (i.e. selecting a rear wheel
drive program for a center wheel drive wheelchair or vice versa). Adverse joystick
control of the wheelchair will occur, possibly resulting in serious bodily injury.
NOTE: If unsure if correct program is selected, perform the instructions outlined in Programs on
page 29 before making performance adjustments.
The selection arrow points to PERFORMANCE ADJUST. To select this activity press the
SELECT key.
➜ PERFORMANCE ADJUST
PROGRAMS
OTHER

The display screen will change to show the first four performance functions and the
programmed value for the functions. The selection arrow points to the first function Forward Speed. Pressing the
or
key will move the selection arrow up or down.
Continue pressing the
or
key to cycle through all the options listed in the flowchart
in NX, NX-50, NX-75, NX w/ACC, and NX-B Controller on page 22 or NX-LP Controller
on page 24.
➜ FORWARD SPEED
TURNING SPEED
ACCELERATION - FWD
ACCELERATION - REV

MK5™NX™Electronics

Part No 1110532

SECTION 5—PERFORMANCE ADJUSTMENTS
To change the programmed value for an option (i.e. Acceleration - FWD), press the
so the selection arrow points to Acceleration - FWD.

key

FORWARD SPEED
TURNING SPEED
➜ ACCELERATION - FWD
ACCELERATION - REV

Press the SELECT key. The display screen changes to the adjustment screen. The top line
shows the function. The second line shows the value. At the bottom is a bar graph which
shows the relative position of the current value to the total adjustment range. Pressing the
or
key will adjust the value.
ACCELERATION - FWD
35%
[

]

Pressing the
Pressing the

key causes the value to increase and the bar graph to move to the right.
key causes the value to decrease and the bar graph to move to the left.

ACCELERATION - FWD
70%
[

]

To save this change, press the SAVE key.
When saving to the drive program is complete, the screen will change to display:
CHANGES SAVED TO
*RWD - 2 POLE
CONTINUE? PRESS MENU
QUIT? PRESS POWER

*NOTE: The driving program selected is either RWD-2 Pole, RWD - 4 Pole, or CWD 2 - Pole.
Refer to the flow chart in NX, NX-50, NX-75, NX w/ACC, and NX-B Controller on page 22 or
NX-LP Controller on page 24.
Pressing the MENU key allows the adjustment sequence to be repeated for other driving
programs.

Part No 1110532

MK5™NX™Electronics

SECTION 5—PERFORMANCE ADJUSTMENTS

NX, NX-50, NX-75, NX w/ACC, and NX-B Controller
Flowchart
NOTE: For this procedure, refer to FIGURE 5.4.
Below is a flowchart on how to use a hand held programmer to select and modify
functions.

FIGURE 5.4 NX, NX-50, NX-75, NX w/ACC, and NX-B Controller

MK5™NX™Electronics

Part No 1110532

SECTION 5—PERFORMANCE ADJUSTMENTS
Performance Menu Description
The performance adjustment menu items are listed below with a description of each
function.
MENU ITEM

DESCRIPTION

FORWARD SPEED

Sets the maximum forward speed. The fastest speed setting is 100%. Use the
and
keys to change the value.

TURNING SPEED

Sets the TURNING SPEED as a percentage of the maximum forward speed. The
turning speed is independent of the forward speed setting so that the turning
speed can be greater than the forward speed. The fastest turning speed setting
is 60%. Use the
and
keys to change the value.

ACCELERATION - FWD

ACCELERATION - FWD sets how quickly the controller will accelerate when
the joystick is moved forward from neutral.

ACCELERATION - REV

ACCELERATION - REV sets how quickly the controller will accelerate when
the joystick is moved to the rear from neutral.

TURN
ACCELERATION

TURN ACCELERATION sets how quickly the controller will accelerate when
the joystick is moved to the left or right from neutral.

TURN
DECELERATION

TURN DECELERATION sets how quickly the controller will decelerate when
the joystick is moved to the left or right from neutral.

BRAKING FORWARD

BRAKING FORWARD sets how quickly the controller will decelerate when the
joystick is moved toward neutral from a forward position.

BRAKING REVERSE

BRAKING REVERSE sets how quickly the controller will decelerate when the
joystick is moved toward neutral from a reverse position.

REVERSE SPEED

The maximum speed the controller will drive with the joystick full reverse and
the speed pot fully clockwise.

TREMOR DAMPENING

As the wheelchair approaches a required speed (determined by joystick
position) acceleration/deceleration will reduce. A higher value will soften the
transition from acceleration/deceleration to that speed.

TORQUE

This parameter allows the controller to compensate appropriately for adverse
driving conditions, for example when going over curbs and ramps. It is the
parameter that optimizes the driving performance of the controller to the
motors being used by setting a specific motor resistance.
The controller will not control the wheelchair correctly unless this is carefully
set.

Part No 1110532

MK5™NX™Electronics

SECTION 5—PERFORMANCE ADJUSTMENTS

NX-LP Controller
Flowchart
NOTE: For this procedure, refer to FIGURE 5.5.
Below is a flowchart on how to use a hand held programmer to select and modify
functions.

FIGURE 5.5 NX-LP Controller

MK5™NX™Electronics

Part No 1110532

SECTION 5—PERFORMANCE ADJUSTMENTS
Performance Menu Description
The performance adjustment menu items are listed below with a description of each
function.
MENU ITEM

DESCRIPTION

FORWARD SPEED

Sets the maximum forward speed. The fastest speed setting is 100%. Use the
and
keys to change the value.

TURNING SPEED

ACCELERATION - FWD

ACCELERATION - FWD sets how quickly the controller will accelerate when
the joystick is moved forward from neutral.

ACCELERATION - REV

ACCELERATION - REV sets how quickly the controller will accelerate when the
joystick is moved to the rear from neutral.

REVERSE SPEED

The maximum speed the controller will drive with the joystick full reverse and
the speed pot fully clockwise.

Part No 1110532

MK5™NX™Electronics

SECTION 6—REMOTE PROGRAMMER

SECTION 6—REMOTE
PROGRAMMER
Overview
NOTE: For this procedure, refer to FIGURE 6.1.
The Remote Programmer is the information center of the control module. Through simple
key sequences, the Remote Programmer allows modification of the performance
characteristics, gives diagnostics information for troubleshooting and permits calibration
of the control module.
NOTE: The joystick power switch must be on for the programmer to operate. If the programmer
displays “Communication Error”, disconnect the programmer and reconnect it with the joystick
turned on.
SPJ
Joystick

Remote
Programmer

LCD Display
POWER Key

SAVE Key

Multi-Function
Charger Input

UP Key
SELECT
Key

MENU Key

CSPJ
Joystick

DOWN
Key
To Joystick
Multi-Function
Charger Input

SPJ+ w/ACC
Joystick

Remote
Programmer

SPJ+
Joystick

FIGURE 6.1 Overview
MK5™NX™Electronics

Part No 1110532

SECTION 6—REMOTE PROGRAMMER

Remote Programmer Terminology
Function
A function is a performance characteristic which can be adjusted or modified to improve
the operation of the wheelchair for a particular control need. Two examples are:
The forward speed function may be adjusted to a higher or lower speed the same way as
you would adjust a trimpot in other controls.
Stand-by Mode Function may be turned ON or OFF the same as a switch would be used.
All functions are listed in a menu.

Value
Each function has a value. It is the degree or amount of the function which is used to
influence the overall wheelchair performance. Most values are numerical or in
percentages, for instance - high speed may be set to 75% of the wheelchair's maximum.
For others, the value is either ON or OFF, for example - Stand-by Mode. Changing a value
is called Adjustment.

Program (Preset Programs with Standard Value Settings)
The standard programs are fixed function values which are used as an initial set up point
from which individualization of the wheelchair performance can begin. Standard values
are NEVER altered or modified. Refer to Programs on page 29.

Temporary Memory
This is the location where function values may be altered to suit individual needs by using
the remote programmer. Unless saved, changes to the values in the temporary memory
will be erased when the wheelchair power is turned off. Refer to User Memory Values
below.

User Memory Values
User memory is the location where the individualized function values are permanently
stored. Each time the power switch is turned on, these values are copied to the temporary
memory and are used to control the wheelchair performance. The user memory values
can only be changed through the Remote Programmer by first modifying the temporary
memory values and then by saving them in the user memory where they become the user
program. The Remote Programmer is activated by pressing the POWER key when the
wheelchair is in neutral. The wheelchair cannot be driven when the LCD display is
illuminated. The display will automatically turn itself OFF after 45 seconds if no keys are
pressed. It can also be turned OFF by pressing the POWER key.

Part No 1110532

MK5™NX™Electronics

SECTION 6—REMOTE PROGRAMMER

Description Of Remote Programmer Keys
KEY

DESCRIPTION

POWER KEY

The POWER key turns on and off the LCD display. Press the POWER key
once and the display will come ON. Press the POWER key again and the
display will turn OFF.

MENU KEY

The MENU key returns the LCD display to the previous screen. If a function is being adjusted, pressing the MENU key returns the display to the
Performance Menu. Pressing the key again will cause the display to change
to the Main Menu.

AND DOWN

KEYS

These keys are used to move the selection arrow on the LCD up and
down or adjust a value up or down. An adjusted value is not saved unless
the SAVE key is pressed.

SELECT KEY

The SELECT key chooses the item to which the selection arrow on the
LCD is pointing and displays the appropriate next screen.

SAVE KEY

The SAVE key causes the Save screen to appear or causes the values that
have been modified in temporary memory to be permanently stored in the
driving program specified by the selection arrow.

MK5™NX™Electronics

Part No 1110532

SECTION 7—PROGRAMS

SECTION 7—PROGRAMS
Program Settings
WARNING

DO NOT mismatch a program with the wheelchair type (i.e. selecting a rear wheel
drive program for a center wheel drive wheelchair or vice versa). Confirm that the
settings and program match the wheelchair before selecting or saving. Otherwise,
unintended and unsafe joystick control of the wheelchair will occur, possibly resulting in serious bodily injury.
The program settings are available as a reference point for initial set-up of the wheelchair,
for final user setting or whenever major changes have been made in the performance and
a known starting point needs to be reestablished. Confirm that the settings and program
match the wheelchair before selecting or saving.
Three programs are available.
1. Select PROGRAMS from the main menu to display the standard value menu.
2. Press
or
and then the SELECT key to select the standard program to be placed
in the temporary memory.
3. Press the SAVE key to store the program into a selected drive.
4. Make changes to specific functions as needed.
The general capabilities of the standard programs are listed below:
PROGRAMMER READS

DRIVE TYPE

MOTOR TYPE

RWD

Rear Wheel Drive

2-Pole

RWD

Rear Wheel Drive

4-Pole

ATM

Rear Wheel Drive

2-Pole

CWD

Center Wheel Drive

2-Pole

MWD

Center Wheel Drive

2-Pole

NOTE: If the default settings in the following tables are not desired, they will need to be changed
manually. Performance Adjustments on page 19.

Part No 1110532

MK5™NX™Electronics

SECTION 7—PROGRAMS
DEFAULT SETTINGS FOR NX

FUNCTION

PROGRAM 1

PROGRAM 2

PROGRAM 3

RWD 2-POLE

RWD 4-POLE

CWD 2-POLE

FORWARD SPEED

TURNING SPEED

ACCELERATION - FWD

ACCELERATION - REV

TURN ACCELERATION

TURN DECELERATION

BRAKING FORWARD

BRAKING REVERSE

REVERSE SPEED

TREMOR DAMPENING

TORQUE

144

DEFAULT SETTINGS FOR NX-B

FUNCTION

PROGRAM 1

PROGRAM 2

PROGRAM 3

ATM 2-POLE

RWD 2-POLE

CWD 2-POLE

FORWARD SPEED

100

TURNING SPEED

ACCELERATION - FWD

ACCELERATION - REV

TURN ACCELERATION

TURN DECELERATION

BRAKING FORWARD

BRAKING REVERSE

REVERSE SPEED

TREMOR DAMPENING

TORQUE

144

MK5™NX™Electronics

Part No 1110532

SECTION 7—PROGRAMS
DEFAULT SETTINGS FOR NX-50

FUNCTION

PROGRAM 1

PROGRAM 2

PROGRAM 3

M41-1

M41-2

M41-3

FORWARD SPEED

TURNING SPEED

ACCELERATION - FWD

ACCELERATION - REV

TURN ACCELERATION

TURN DECELERATION

BRAKING FORWARD

BRAKING REVERSE

REVERSE SPEED

TREMOR DAMPENING

TORQUE

DEFAULT SETTINGS FOR NX W/ACC

FUNCTION

PROGRAM 1

PROGRAM 2

PROGRAM 3

MWD - M61 (1)

MWD - M61 (2)

MWD - M61 (3)

FORWARD SPEED

TURNING SPEED

ACCELERATION - FWD

ACCELERATION - REV

TURN ACCELERATION

TURN DECELERATION

BRAKING FORWARD

BRAKING REVERSE

REVERSE SPEED

TREMOR DAMPENING

TORQUE

144

Part No 1110532

MK5™NX™Electronics

SECTION 7—PROGRAMS
DEFAULT SETTINGS FOR NX-75

FUNCTION

PROGRAM 1

PROGRAM 2

PROGRAM 3

CWD M91

CWD M91 HD

CWD M91

FORWARD SPEED

TURNING SPEED

ACCELERATION - FWD

ACCELERATION - REV

TURN ACCELERATION

TURN DECELERATION

BRAKING FORWARD

BRAKING REVERSE

REVERSE SPEED

TREMOR DAMPENING

TORQUE

DEFAULT SETTINGS FOR NX-LP

FUNCTION

PROGRAM 1

PROGRAM 2

PROGRAM 3

RWD 2-POLE

RWD 4-POLE

CWD 2-POLE

FORWARD SPEED

100

TURNING SPEED

ACCELERATION - FWD

ACCELERATION - REV

REVERSE SPEED

MK5™NX™Electronics

Part No 1110532

SECTION 8—OTHER FUNCTIONS

SECTION 8—OTHER FUNCTIONS
Description of Other Functions
Select OTHER from the main menu to display Motor Balance, Joystick Throw, Fault Log,
and Usage Statistics. Use the
and
keys to select the function desired. The SELECT
key will display the current value and permit modifications. Always press SAVE after
changes are made.
NOTE: At any point, press the MENU key to return to the previous screen.
MENU ITEM

DESCRIPTION

MOTOR BALANCE

Motor balance corrects for veer when going straight on level ground. To correct
key.
for a veer to the right, move the bar graph indicator to the right using the
To correct for veer to the left, move the bar graph indicator to the left using the
key.

JOYSTICK THROW

Joystick throw calibration is used to calibrate the neutral position and the full speed
travel of the proportional joystick. The control module stores the maximum displacement of the joystick and later, during driving, uses the values to generate a full
speed command whenever that displacement is reached. Exceeding this displacement does not product further increase in speed. The result of this method of calibration is a customized driving template.

FAULT LOG

The Fault Log shows the fault codes that have been detected by the diagnostic system since the control was built in the factory. The fault codes correspond to the
Diagnostics Codes given in the next section. The Fault Log can be used by the service technician to uncover the cause of intermittent faults that are not evident when
the wheelchair is being serviced.
NOTE: It is normal to have some codes in the Fault Log, even in a new wheelchair, because
they are generated during factory testing and calibration.

USAGE STATISTICS

The usage statistics screen displays how long the wheelchair has been on in hours:
minutes, the total number of times the wheelchair has been powered up and how
many times the wheelchair has been driven.

Part No 1110532

MK5™NX™Electronics

SECTION 9—DIAGNOSTIC CODES

SECTION 9—DIAGNOSTIC CODES
What Are Diagnostics Codes?

NUMBER OF FLASHES

DIAGNOSTICS CODE

ERROR CODE
DESCRIPTION

SUB CODE*

DETAILS OF
ERROR CODE

POSSIBLE
SOLUTION

The joystick information gauge and the Remote Programmer give indications of the type
of fault or error detected by the control module. When a fault is detected, the wheelchair
will stop and not drive. All of the lights on the information gauge will begin to flash (SPJ
and CSPJ joysticks) or the service indicator light will flash (SPJ+ and SPJ+ w/ACC
joystick). The number of flashes indicates the nature of an abnormal condition. An error
code and a quick description of the fault will begin to scroll across the Remote
Programmer display. If multiple faults are found, only the first fault encountered by the
control module program will be displayed. Refer to the Power Wheelchair Service
Manual for detailed troubleshooting and repair instructions. A table of the diagnostics
codes and their causes follows.
*NOTE: The fault log displays a four digit number. The first two digits are the diagnostic code and
the remaining two digits are the sub code.

E 01

User Fault

Stall Timeout or user error.

Release joystick to neutral and try again.

E02

Battery Fault

E03

Left Motor Fault

Left Motor Short Circuit

Left Motor Open Circuit

Left Motor Connection Fault
B-

Motor Terminal Connected
to B+

Left Motor Voltage Fault

Left Motor Bridge Fault

Too Many Hardware Current
Limit Events

Current Offset Out of Range

Hardware Current Limit Fault

MK5™NX™Electronics

Recharge batteries or replace. Check the batteries and cable. Try charging the batteries. Batteries may require
replacing.

Check the left motor, connections and
motor cable.

Part No 1110532

DIAGNOSTICS CODE

ERROR CODE
DESCRIPTION

SUB CODE*

DETAILS OF
ERROR CODE

E04

Right Motor Fault

Right Motor Short Circuit

E05

E06

Left Park Brake
Fault

Right Park Brake
Fault

Part No 1110532

Right Motor Open Circuit

Right Motor Connection Fault
B-

Motor Terminal Connected
to B+

Right Motor Voltage Fault

Right Motor Bridge Fault

Too Many Hardware Current Limit Events

Current Offset Out of Range

Hardware Current Limit Fault

Left Park Brake Drive-Time
Test Failed

Left Park Brake Output
Enabled When Wheelchair
Idle

Left Park Brake Output Did
not Enable When Entering
Drive Mode

Left Park Brake fault during
power-up testing

Left park brake feedback low
during drive (park brake
short)

Right Park Brake Drive-Time
Test Failed

Right Park Brake Output
Enabled When Wheelchair
Idle

Right Park Brake Output Did
not Enable When Entering
Drive Mode

Right Park Brake fault during
power-up testing

Right park brake feedback
low during drive (park brake
short)

POSSIBLE
SOLUTION

NUMBER OF FLASHES

SECTION 9—DIAGNOSTIC CODES

Check the right motor, connections and
motor cable.

Check the left park brake connections and
cable.

Check the right park brake connections
and cable.

MK5™NX™Electronics

ERROR CODE
DESCRIPTION

SUB CODE*

E07

Remote Fault

E08

E09

POSSIBLE
SOLUTION

DIAGNOSTICS CODE

DETAILS OF
ERROR CODE

NUMBER OF FLASHES

SECTION 9—DIAGNOSTIC CODES

Local SR Fault (CPU,
EEPROM, etc.)

Check the communications bus, connections and wiring. Replace the remote.

Joystick fault at the remote

Speed pot fault at the remote

Controller fault

RAM fault

ROM fault

CPU fault

EEPROM fault

Watchdog fault

Stack fault

Software fault

Power-up testing fault

Relay fault or precharge fault

Bridge fault or disable all fault

Electronics fault: Thermistor

Calibration setting fault

Communications
Fault

Remote connection lost

Low communication mode

Controller Fault

Check connections and wiring. Replace
power module.

Check connections and wiring. Replace
Bus cable.

E10

General Fault

General fault

Check all connections and wiring. Contact
Invacare Technical Service.

E11

Incompatible/
incorrect Remote

Incompatible/incorrect
Remote

Wrong type of remote connected. Ensure
the branding of the joystick matches that
of controller unit.

MK5™NX™Electronics

Part No 1110532

SECTION 10—CONNECTOR DESCRIPTIONS

SECTION 10—CONNECTOR
DESCRIPTIONS
Controller Connector Descriptions
NX, NX-50, NX-75, NX-B and NX-LP
NOTE: For this procedure, refer to FIGURE 10.1.
Front of
Controller

FIGURE 10.1 NX, NX-50, NX-75, NX-b and NX-LP

NX w/ACC
NOTE: For this procedure, refer to FIGURE 10.2.
Front of
Controller

FIGURE 10.2 NX w/ACC
Part No 1110532

MK5™NX™Electronics

SECTION 10—CONNECTOR DESCRIPTIONS

Battery Connector Pinout
NOTE: For this procedure, refer to FIGURE 10.3.
PIN

FUNCTION

Battery Positive

Battery Negative

FIGURE 10.3 Battery Connector Pinout

Motor Connector Pinout
NOTE: For this procedure, refer to FIGURE 10.4.
2

FUNCTION

Motor Positive

Motor Negative

Park Brake Negative

Park Brake Positive

FIGURE 10.4 Motor Connector Pinout

Joystick Connector Pinout
NOTE: For this procedure, refer to FIGURE 10.5.
PIN

FUNCTION

Battery Positive

Communication Bus High

Communication Bus Low

Battery Negative

FIGURE 10.5 Joystick Connector Pinout

Drive Control Input (DCI)
NOTE: Wheelchairs equipped with DCI have seating options (i.e. elevate and tilt).
The DCI allows the wheelchair mode to depend on the resistance of the DCI “Loop”:
• Inhibit - prevents the wheelchair from driving, typically when the wheelchair is being
charged, or when the seat is tilted.
• Slow - limits the drive speed to a predetermined value, typically when the seat is
raised.
To determine the mode, an appropriate resistance must be placed across the DCI input
pin (I) and the DCI Battery Negative (-) pin. Depending on the resistance value, the
controller will inhibit, slow, and/or swivel driving. Resistors used must be 5% tolerance
resistors.
MODE

RESISTANCE

Inhibit
Slow
Normal

MK5™NX™Electronics

0
120
Open

Part No 1110532

SECTION 10—CONNECTOR DESCRIPTIONS
NX, NX-50, NX-75, NX-B, and NX-LP
NOTE: For this procedure, refer to FIGURE 10.6.
PIN

FUNCTION

Battery Positive

DCI Input (Drive Lockout)

--No Connection--

Battery Negative

FIGURE 10.6 NX, NX-50, NX-75, nx-b,
and NX-LP

NX w/ACC
NOTE: For this procedure, refer to FIGURE 10.7.
PIN

FUNCTION

Actuator 1 Negative

Actuator 1 Positive

n/a

Actuator 2 Negative

Drive Control Input (Drive Lockout)

Battery Positive

n/a

Actuator 2 Positive

Battery Negative

-- No Connection --

FUNCTION

n/a

1
6

FIGURE 10.7 NX w/ACC

Battery Charger Port
NOTE: For this procedure, refer to FIGURE 10.8.
PIN

FUNCTION

Battery Positive

Battery Negative

Serial Data/DCI Input

Front of
Joystick

1
2
3

FIGURE 10.8 Motor Connector Pinout

Part No 1110532

MK5™NX™Electronics

LIMITED WARRANTY
PLEASE NOTE: THE WARRANTY BELOW HAS BEEN DRAFTED TO COMPLY WITH
FEDERAL LAW APPLICABLE TO PRODUCTS MANUFACTURED AFTER JULY 4, 1975.
This warranty is extended only to the original purchaser/user of our products.
This warranty gives you specific legal rights and you may also have other legal rights which vary
from state to state.
Invacare warrants the NX, NX-50, NX-75, NX-LP, NX-B and NX w/ACC Controller to be free
from defects in materials and workmanship for a period of one year from date of purchase. If
within such warranty period any such product shall be proven to be defective, such product shall
be repaired or replaced, at Invacare's option. This warranty does not include any labor or
shipping charges incurred in replacement part installation or repair of any such product.
Invacare's sole obligation and your exclusive remedy under this warranty shall be limited to
such repair and/or replacement.
For warranty service, please contact the dealer from whom you purchased your Invacare
product. In the event you do not receive satisfactory warranty service, please write directly to
Invacare at the address at the bottom of the back cover. Provide dealer’s name, address, date
of purchase, indicate nature of the defect and, if the product is serialized, indicate the serial
number. Do not return products to our factory without our prior consent.
LIMITATIONS AND EXCLUSIONS: THE FOREGOING WARRANTY SHALL NOT APPLY
TO SERIAL NUMBERED PRODUCTS IF THE SERIAL NUMBER HAS BEEN REMOVED OR
DEFACED, PRODUCTS SUBJECTED TO NEGLIGENCE, ACCIDENT, IMPROPER
OPERATION, MAINTENANCE OR STORAGE, COMMERCIAL OR INSTITUTIONAL USE,
PRODUCTS MODIFIED WITHOUT INVACARE'S EXPRESS WRITTEN CONSENT
INCLUDING, BUT NOT LIMITED TO, MODIFICATION THROUGH THE USE OF
UNAUTHORIZED PARTS OR ATTACHMENTS; PRODUCTS DAMAGED BY REASON OF
REPAIRS MADE TO ANY COMPONENT WITHOUT THE SPECIFIC CONSENT OF
INVACARE, OR TO A PRODUCT DAMAGED BY CIRCUMSTANCES BEYOND INVACARE'S
CONTROL, AND SUCH EVALUATION WILL BE SOLELY DETERMINED BY INVACARE.
THE WARRANTY SHALL NOT APPLY TO PROBLEMS ARISING FROM NORMAL WEAR
OR FAILURE TO ADHERE TO THESE INSTRUCTIONS.
THE FOREGOING EXPRESS WARRANTY IS EXCLUSIVE AND IN LIEU OF ANY OTHER
WARRANTIES WHATSOEVER, WHETHER EXPRESS OR IMPLIED, INCLUDING THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, AND THE SOLE REMEDY FOR VIOLATIONS OF ANY WARRANTY
WHATSOEVER, SHALL BE LIMITED TO REPAIR OR REPLACEMENT OF THE DEFECTIVE
PRODUCT PURSUANT TO THE TERMS CONTAINED HEREIN. THE APPLICATION OF
ANY IMPLIED WARRANTY WHATSOEVER SHALL NOT EXTEND BEYOND THE
DURATION OF THE EXPRESS WARRANTY PROVIDED HEREIN. INVACARE SHALL NOT
BE LIABLE FOR ANY CONSEQUENTIAL OR INCIDENTAL DAMAGES WHATSOEVER.
THIS WARRANTY SHALL BE EXTENDED TO COMPLY WITH STATE/PROVINCIAL
LAWS AND REQUIREMENTS.

Invacare Corporation

www.invacare.com

USA
One Invacare Way
Elyria, Ohio USA
44036-2125
800-333-6900

Canada
570 Matheson Blvd E Unit 8
Mississauga Ontario
L4Z 4G4 Canada
800-668-5324

Invacare, Yes, you can. and the
Medallion Design are registered
trademarks of Invacare Corporation.
MK5, NX, SPJ and CSPJ are trademarks
of Invacare Corporation.
© 2006 Invacare Corporation
Part No 1110532
Rev G - 08/16/06

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.3
Linearized                      : Yes
Author                          : csparks
Create Date                     : 2006:08:16 15:31:02Z
Modify Date                     : 2008:10:31 16:06:52-04:00
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Invacare 1110532 1110532G User Manual To The Ddc2505f 5b4f 45d7 B746 32b55915556f

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