Invacare MK5 EX 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™EX™and
MK5™TT-EX™
Electronics

MK5™EX™and MK5™TT-EX™ Electronics 2Part No 1114808
 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’S 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’S 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.
NOTE: This manual is also available in French Canadian (Part Number 1123834).
NOTE: Updated versions of this manual are available on www.invacare.com.

TABLE OF CONTENTS
Part No 3Manual Title
TABLE OF CONTENTS
SPECIAL NOTES ................................................................................ 7
SECTION 1—EMI INFORMATION ....................................................... 8
SECTION 2—TROUBLESHOOTING .................................................... 10
All Power Wheelchairs ...........................................................................................................................10
Wheelchairs With Powered Seating Systems....................................................................................11
Formula™TRE only.............................................................................................................................12
SECTION 3—JOYSTICK DESCRIPTIONS ............................................. 14
Joystick Overview.....................................................................................................................................14
DPJ Joystick Switches and Indicators ...................................................................................................14
Power/Drive Select Toggle Switch ..................................................................................................14
Selecting the Drive Mode .............................................................................................................14
Turning the Wheelchair Off ........................................................................................................14
Speed Control Knob ...........................................................................................................................15
Mode (On/Off) Switch........................................................................................................................15
Battery Gauge Display (BGD)...........................................................................................................15
MPJ Joystick Switches and Indicators...................................................................................................15
Power/Drive Select Toggle Switch ..................................................................................................16
Selecting the Drive Mode .............................................................................................................16
Turning the Wheelchair Off ........................................................................................................16
Speed Control Knob ...........................................................................................................................16
LCD Display ..........................................................................................................................................16
Remote On/Off Input..........................................................................................................................17
SECTION 4—REMOTE PROGRAMMER .............................................. 18
Overview....................................................................................................................................................18
Remote Programmer Terminology ......................................................................................................18
Function..................................................................................................................................................18
Value .......................................................................................................................................................19
Standard Program (Preset Programs) .............................................................................................19
User Memory Values...........................................................................................................................19
Description Of Remote Programmer Keys .......................................................................................19
SECTION 5—PERFORMANCE ADJUSTMENTS .................................... 20
Speed and Response Screen ..................................................................................................................20
Advanced Menu.........................................................................................................................................20
Performance Menu...................................................................................................................................20
Making Performance Adjustments........................................................................................................21
Performance Menu Description............................................................................................................24
SECTION 6—STANDARD VALUE SETTINGS ...................................... 32
Standard Value Settings...........................................................................................................................32

TABLE OF CONTENTS
Manual Title 4Part No
TABLE OF CONTENTS
SECTION 7—CALIBRATION OF THE CONTROL MODULE ................... 33
When to Calibrate the Control Module.............................................................................................33
What Functions Can Be Calibrated .....................................................................................................33
Calibrating the Control Module............................................................................................................33
SECTION 8—CURRENT STATUS DISPLAY ......................................... 37
SECTION 9—DIAGNOSTIC CODES .................................................... 38
What Are Diagnostics Codes? ..............................................................................................................38
MK5 EX Controller Diagnostic Codes ...............................................................................................38
MK5 TT-EX Controller Diagnostic Codes ........................................................................................39
SECTION 10—OPTIONS ................................................................... 42
Display Unit................................................................................................................................................42
Drive Select and On/Off Switch .......................................................................................................42
Selecting the Drive Mode .............................................................................................................42
LCD Display ..........................................................................................................................................43
Remote On/Off ....................................................................................................................................43
Special Purpose Indicators .................................................................................................................43
MK5 PSR/PSF Joysticks............................................................................................................................44
Joystick Overview................................................................................................................................44
Power/Drive Select Toggle Switch ..................................................................................................45
Selecting the Drive Mode .............................................................................................................46
Turning the Wheelchair Off ........................................................................................................46
Speed Control Knob ...........................................................................................................................46
Battery Gauge Display (BGD)...........................................................................................................46
Mode and Level Indicators.................................................................................................................46
1558M4 Compact Joystick......................................................................................................................47
1500M4 Rim Head Control ...................................................................................................................48
1812M4 Dual Proportional Joystick .....................................................................................................48
1554M5 or 1554M4 Sip & Puff Switch Input ......................................................................................49
Driver Control Input Connector.....................................................................................................49
Proportional Attendant Connector.................................................................................................50
Sip and Puff (Pneumatic Switch) Input.............................................................................................50
Mounting Precautions and Maintenance.........................................................................................50
Selecting the Driver Input Type .......................................................................................................50
Calibrating the Sip & Puff Pressures ................................................................................................51
PACM5 Proportional Attendant Control...........................................................................................52
Override and Speed Control Knob.................................................................................................52
1552M Attendant Control .....................................................................................................................53
On/Off Toggle Switch .........................................................................................................................53
Four Directional Switch......................................................................................................................53

TABLE OF CONTENTS
Part No 5Manual Title
TABLE OF CONTENTS
1556m Heavy Duty Joystick...................................................................................................................53
Using the Heavy Duty Joystick..........................................................................................................54
AUX12 Eight Output Electronic Communications Module ...........................................................54
AUX34 Ten Output Electronic Communications Module.............................................................55
ECU1 and ECU2 .......................................................................................................................................55
ECU3 and ECU4 .......................................................................................................................................55
Connector Description...........................................................................................................................55
MK5 Tilt, Recline and Elevate Control Module (TRECM)..............................................................56
Programming the TRECM..................................................................................................................57
TRECM Performance Adjust Menu Description ....................................................................57
TRECM Standard Programs Menu Description ......................................................................58
TRECM Actuator Selection Menu Description .......................................................................58
TRECM Current Status Menu Description ..............................................................................59
MK5 Tilt and Recline Control Module (TRCM) ...............................................................................60
Programming the TRCM ....................................................................................................................60
TRCM Performance Adjust Menu Description .......................................................................61
TRCM Standard Programs Menu Description ........................................................................62
TRCM Actuator Selection Menu Description .........................................................................63
TRCM Current Status Menu Description ................................................................................63
MK5 Two Actuator Controller (TAC) ...............................................................................................64
Programming the TAC .......................................................................................................................65
TAC System Type Menu Description .......................................................................................66
TAC Performance Adjust Menu Description ..........................................................................66
TAC Actuator Selection Menu Description ............................................................................67
TAC Current Status Menu Description ...................................................................................67
MK5 Single Actuator Control (SAC)...................................................................................................67
Lockout ..................................................................................................................................................68
Slow.........................................................................................................................................................68
SECTION 11—CALIBRATING POTENTIOMETERS .............................. 69
Preparing to Calibrate Potentiometers...............................................................................................69
Potentiometer Calibration for 2GTR Systems..................................................................................69
Tilt Angle Potentiometer Calibration .............................................................................................69
Recline Angle Potentiometer Calibration ......................................................................................70
Potentiometer Calibration for 2GT Systems.....................................................................................71
Tilt Angle Potentiometer Calibration .............................................................................................71
Potentiometer Calibration for 2GR Systems.....................................................................................72
Recline Angle Potentiometer Calibration ......................................................................................72
SECTION 12—CONNECTOR DESCRIPTIONS ...................................... 73
Driver Control Input Connector (1554M4 or 1554M5) ................................................................73

Manual Title 6Part No
Environmental Control Outputs - ECU 1, 2, 3 and 4......................................................................73
Emergency Stop/Reset Switch ...............................................................................................................74
Emergency Stop/Reset Input..................................................................................................................74
15-pin D-Subminiature on Control Module.......................................................................................75
5-Pin Connector on Control Module..................................................................................................75
Battery Connector - Anderson SB50 ..................................................................................................75
MI and M2 Motor Connectors..............................................................................................................75
4-Pin (MK5 EX) ....................................................................................................................................75
13-Pin D-Sub (MK5 TT EX)...............................................................................................................76
5-Pin Connector on Control Module..................................................................................................76
PTO/Charge Input (MK5 EX)................................................................................................................76
Remote On/Off Input On MPJ or Display unit..................................................................................76
SECTION 13—CURRENT ROLLBACK ................................................ 77
What Is Current Rollback?.....................................................................................................................77
What Increases the Likelihood of Current Rollback?......................................................................77
Weight....................................................................................................................................................77
Rolling Resistance ................................................................................................................................77
Terrain Angle ........................................................................................................................................77
Speed.......................................................................................................................................................77
How to Solve It? .......................................................................................................................................78
Electronic Adjustments.......................................................................................................................78
Drive Motors ........................................................................................................................................78
Common Mistakes ...................................................................................................................................78
SECTION 14—APPENDIX ................................................................ 79
Special Purpose Indicator Description for LCD Display.................................................................79
LIMITED WARRANTY ..................................................................... 80

SPECIAL NOTES
Part No 1114808 7MK5™EX™and MK5™TT-EX™ Electronics
SPECIAL NOTES
WARNING/CAUTION notices as used in this manual apply to hazards or unsafe
practices which could result in personal injury or property damage.
NOTICE
THE INFORMATION CONTAINED IN THIS DOCUMENT IS SUBJECT TO
CHANGE WITHOUT NOTICE.
 REPAIR OR SERVICE WARNING
Setup of the Electronic Controller is to be performed ONLY by individuals certified
by Invacare. The adjustments of the controller may affect other activities of the
wheelchair. Damage to the equipment could occur under these circumstances. If
uncertified individuals perform any work on these units, the warranty is void.
 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. Incor-
rect settings could cause injury to the driver, bystanders, damage to the chair 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 immedi-
ately and re-enter setup specifications. Repeat this procedure until the wheelchair
performs to specifications.

SECTION 1—EMI INFORMATION
MK5™EX™and MK5™TT-EX™ Electronics 8Part No 1114808
SECTION 1—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 1—EMI INFORMATION
Part No 1114808 9MK5™EX™and MK5™TT-EX™ Electronics
 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) 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 RFI immunity levels.

SECTION 2—TROUBLESHOOTING
MK5™EX™and MK5™TT-EX™ Electronics 10 Part No 1114808
SECTION 2—TROUBLESHOOTING
All Power Wheelchairs
SYMPTOM PROBABLE CAUSE SOLUTIONS
Error Code:
E9 or E10 - MPJ joystick
3 flashes - DPJ joystick
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.
Bad brake coil. Ohm out motors. Check brushes and replace if
necessary. Replace motors if high reading is present.
Normal reading is 0-5 Ohms (4 Pole only). Calibrate
GB motors. Refer to wheelchair Service Manual.
Error Code:
E28 - MPJ joystick
5 flashes - DPJ joystick
Battery charger connected. Unplug battery charger from the wheelchair. Refer
to the wheelchair Owner’s Manual for information
about the battery charger.
Error Code:
E14 - MPJ joystick
5 flashes - DPJ joystick
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 25 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.
Power indicator off - even
after recharging.
Electrical malfunction. Contact Dealer/Invacare for Service.
Wheelchair slows or
stops while driving AND
one (1) of the following
occurs:
DPJ Joystick - ORANGE
LED flashes
MPJ Joystick -
“HOT” or “SLOW” is
displayed
Current rollback. Wheelchair
has been driving under a heavy
load for an extended period of
time.
Adjust driving parameters to match driving
environment.
Allow time for the electronics to cool down (Light
Duty Use).

SECTION 2—TROUBLESHOOTING
Part No 1114808 11 MK5™EX™and MK5™TT-EX™ Electronics
Wheelchairs With Powered Seating Systems
SYMPTOM PROBABLE CAUSE SOLUTIONS
Wheelchair Power ON but does
not drive.
System tilted, reclined or
elevated beyond drive
lock-out angle (20°).
Return to neutral position (upright and completely
lowered). Refer to the seating system Owner’s
Manual for seating system operating instructions.
Use the programmer to check the Current Status
Menu, particularly the drive lock-out setting. Refer
to TRECM Current Status Menu Description on
page 59.
To adjust drive lock-out angle, Refer to the Formula
TRE setup instructions, part number 1125061 for
drive lock-out adjustment instructions.
To turn drive lock-out on or off, refer to TRECM
Performance Adjust Menu Description on page 57.
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.
Malfunctioning seating
system controller
(TRECM, SAC-E, or ESC).
Replace seating system controller. Contact Invacare.
Bad user switch. Use the programmer to check the TRECM Current
Status Menu for switch status. Refer to TRECM
Current Status Menu Description on page 59.
Error Code:
E28 - MPJ joystick
or
5 flashes - DPJ joystick
System tilted, reclined or
elevated beyond drive
lock-out angle (20°).
Return to neutral position (upright and completely
lowered). Refer to seating system Owner’s Manual.
Use the programmer to check the Current Status
Menu, particularly the drive lock-out setting. Refer
to TRECM Current Status Menu Description on
page 59.
To adjust drive lock-out angle, Refer to the Formula
TRE setup instructions, part number 1125061 for
drive lock-out adjustment instructions.
To turn drive lock-out on or off, refer to TRECM
Performance Adjust Menu Description on page 57.
Bad limit switch, limit
switch out of position or
limit switch missing.
Check limit switch setting. Refer to TRECM Current
Status Menu Description on page 59.
Refer to the Formula TRE setup instructions, part
number 1125061 for limit switch adjustment
instructions.

SECTION 2—TROUBLESHOOTING
MK5™EX™and MK5™TT-EX™ Electronics 12 Part No 1114808
Formula™TRE only
Wheelchair slows or stops while
driving AND one (1) of the
following occurs:
DPJ Joystick - ORANGE LED
flashes
MPJ Joystick -
“SLOW” is displayed
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
(TRECM, SAC-E, or ESC).
Check for error codes. Refer to Options on page 42
for the correct performance adjustment menu
descriptions. Replace seating system controller, if
necessary. Contact Invacare.
Wheelchair will not drive when
seat is elevated.
If not an Elevate Only
system, the seat may be
tilted or reclined beyond
the drive lock-out angle
(20°).
Return to neutral position (upright and completely
lowered). Refer to seating system Owner’s Manual.
Use the programmer to check the Current Status
Menu, particularly the drive lock-out setting. Refer
to TRECM Current Status Menu Description on
page 59.
To adjust drive lock-out angle, Refer to the Formula
TRE setup instructions, part number 1125061 for
drive lock-out adjustment instructions.
To turn drive lock-out on or off, refer to TRECM
Performance Adjust Menu Description on page 57.
Programmer does not work or
gives “communication error”
System tilted, reclined or
elevated beyond drive
lock-out angle (20°).
Return to neutral position (upright and completely
lowered). Refer to seating system Owner’s Manual.
Use the programmer to check the Current Status
Menu, particularly the drive lock-out setting. Refer
to TRECM Current Status Menu Description on
page 59.
To adjust drive lock-out angle, Refer to the Formula
TRE setup instructions, part number 1125061 for
drive lock-out adjustment instructions.
To turn drive lock-out on or off, refer to TRECM
Performance Adjust Menu Description on page 57.
SYMPTOM PROBABLE CAUSE SOLUTIONS
One or more functions do
not stop at the desired
position.
Limit switch not adjusted
properly.
Check limit switch setting. Refer to TRECM Current
Status Menu Description on page 59.
Refer to the Formula TRE setup instructions, part number
1125061 for limit switch adjustment instructions.
Incorrect switch response. Programming error or bad
switch.
Use the programmer to verify TRECM programming. Save
the proper standard program to reset switch functions.
Refer to TRECM Standard Programs Menu Description on
page 58.
SYMPTOM PROBABLE CAUSE SOLUTIONS

SECTION 2—TROUBLESHOOTING
Part No 1114808 13 MK5™EX™and MK5™TT-EX™ Electronics
Drive lock-out will not
engage.
Programming error. Use the programmer to verify the drive lock-out setting in
the Current Status Menu. Refer to TRECM Current Status
Menu Description on page 59.
To adjust drive lock-out angle, Refer to the Formula TRE
setup instructions, part number 1125061 for drive
lock-out adjustment instructions.
To turn drive lock-out on or off, refer to TRECM
Performance Adjust Menu Description on page 57.
TRECM failure. Check all connections to TRECM.
Check limit switch setting. Refer to the Formula TRE
setup instructions, part number 1125061 for limit switch
adjustment instructions.
MK5 controller failure. Replace MK5 controller. Refer to the Service Manual for
the wheelchair.
Drive lock-out turned off
for that particular drive.
Turn on drive lock-out for the desired drive using your
programmer. Refer to TRECM Performance Adjust Menu
Description on page 57.
Limit switch not adjusted
properly.
Check limit switch setting. Refer to TRECM Current
Status Menu Description on page 59.
Refer to the Formula TRE setup instructions, part number
1125061 for limit switch adjustment instructions.
Actuator speed too slow. Low battery voltage. Recharge batteries. Refer to the seating system Owner’s
Manual.
Programming speed set
too low.
Check TRECM programming to confirm the speed setting
for the desired actuator. Refer to TRECM Performance
Adjust Menu Description on page 57.
Actuator speed too fast. Programming error. Check TRECM programming to confirm the speed setting
for the desired actuator. Refer to TRECM Performance
Adjust Menu Description on page 57.
Functions respond to
switch command, but do
not operate through the
driver control.
Programming error Check the Tilt/Recline setting and make sure it is adjusted
to the correct operating mode in the appropriate drive.
Refer to TILT/RECLINE on page 30.
Incorrect or
malfunctioning driver
control
Replace driver control. Refer to wheelchair Service
Manual.
Functions will only operate
in one direction
Improperly wired actuator
motor leads.
Check actuator wiring.
Limit switches not
adjusted properly.
Check limit switches for damage. If damaged replace them.
Contact Invacare.
Check limit switch setting. Refer to TRECM Current
Status Menu Description on page 59.
Refer to the Formula TRE setup instructions, part number
1125061 for limit switch adjustment instructions.
SYMPTOM PROBABLE CAUSE SOLUTIONS

SECTION 3—JOYSTICK DESCRIPTIONS
MK5™EX™and MK5™TT-EX™ Electronics 14 Part No 1114808
SECTION 3—JOYSTICK
DESCRIPTIONS
Joystick Overview
There are two (2) standard joysticks which make up the MK5 system. The two (2) joystick
types are the DPJ™and MPJ™. The joysticks differ in user controls, switches, number of
programmable drives and performance adjustments. The joysticks provide proportional
drive control of speed and direction.
DPJ Joystick Switches and Indicators
NOTE: For this procedure, refer to FIGURE 3.1.
FIGURE 3.1 DPJ Joystick Switches and Indicators
Power/Drive Select Toggle Switch
The three (3) position power/drive select toggle switch is located at the back of the joystick
housing. This switch allows the operator to select the type of operation or performance
which best suits a particular control need or situation and turn the wheelchair off. The
DRIVE 1 program uses performance values which are independent of those used for the
DRIVE 2 program. For example, an operator may have a control need for spasticity in the
morning and a very different need in the afternoon. DRIVE 1 can be programmed for
higher speeds and quicker response while DRIVE 2 can be programmed for slower
speeds and less responsiveness or vise versa.
Selecting the Drive Mode
1. To select DRIVE 1 mode, move the toggle UP.
2. To select DRIVE 2 mode, move the toggle to the MIDDLE position.
Turning the Wheelchair Off
1. To turn the wheelchair off, move the toggle DOWN.
Mode Switch
Battery Gauge Display
Power/Drive Select Toggle
Switch
Speed Control Knob
To Controller
Joystick
Charger/Programming Port

SECTION 3—JOYSTICK DESCRIPTIONS
Part No 1114808 15 MK5™EX™and MK5™TT-EX™ Electronics
Speed Control Knob
The speed control knob is located at the back of the joystick housing.
1. Turn the knob clockwise to increase the maximum speed of the wheelchair.
2. Turn the knob counterclockwise to decrease the maximum speed of the wheelchair.
Mode (On/Off) Switch
The mode (on/off) switch is a push button switch located at the front of the joystick. When
an optional actuator control [Single Actuator control, (SAC), Two Actuator Control (TAC)
or Tilt and Recline Control Module (TRCM)] is present, pushing the switch will change
the controller mode to control the optional actuators through the joystick. The mode
switch LED indicator will be ON. Push the switch again to return to normal joystick
driving. The mode switch LED indicator will be off.
Battery Gauge Display (BGD)
Located at the rear of the joystick housing, the BGD provides information on the
remaining charge in the batteries. At full charge, all six (6) segments of the bar graph are
lit. As the battery discharges, the farthest right (GREEN) segment will go out until only
the red bar is lit. At this level, the last red bar will start to flash on and off to indicate that
the user should charge the batteries as soon as possible.
The BGD also serves as a system diagnostic device when a fault is detected by the control
module. A specific number of flashes (up to eight (8) flashes) of the two (2) RED bars
separated by a pause will indicate the type of fault detected. A chart of the diagnostic
indications is given in Diagnostic Codes on page 38.
MPJ Joystick Switches and Indicators
NOTE: For this procedure, refer to FIGURE 3.2, unless otherwise indicated.
FIGURE 3.2 MPJ Joystick Switches and Indicators
Joystick
Remote On/Off
Input
To Controller
Power/Drive Select Toggle Switch
LCD
Speed Control Knob
Charger/Programming Input

SECTION 3—JOYSTICK DESCRIPTIONS
MK5™EX™and MK5™TT-EX™ Electronics 16 Part No 1114808
Power/Drive Select Toggle Switch
A three (3) position power/drive select toggle switch is located on the side of the joystick
housing. The DRIVE SELECT position is momentary.
This switch allows the operator to select the type of operation or performance which best
suits a particular control need or situation. The DRIVE 1 program uses performance
values which are independent of those used for the DRIVE 2 or 3 or 4 program. As an
example, an operator may have a control need for spasticity in the morning and a very
different need in the afternoon. DRIVE 1 can be programmed for higher speeds and
quicker response while DRIVE 2 can be programmed for slower speeds and less
responsiveness. The remaining drive programs could also be used for indoor and outdoor
versions of DRIVE 1 and DRIVE 2. Finally, when a powered seating system is installed,
one of the remaining drives may be used to control the tilt, recline and/or elevate
functions.
Selecting the Drive Mode
1. Move the toggle UP and release. DRIVE 1 will appear on LCD.
2. Move the toggle UP and release again. DRIVE 2 will appear on LCD.
3. Move the toggle UP and release again. DRIVE 3 will appear on LCD.
4. Move the toggle UP and release again. DRIVE 4 will appear on LCD.
5. Move the toggle UP and release one more time to select DRIVE 1.
Turning the Wheelchair Off
1. Move the toggle BACK to turn the wheelchair off.
Speed Control Knob
The speed control knob is located on the side of the joystick housing.
1. Rotate the knob forward to increase the speed of the wheelchair to the programmed
max speed (FIGURE 3.2).
LCD Display
NOTE: For this procedure, refer to FIGURE 3.2 and FIGURE 3.3.
The LCD Display is located in front of the joystick and provides information on the status
of the wheelchair through a 2 line by 12 character length back lighted display. The LCD
display is readable in both bright sunlight and complete darkness (FIGURE 3.2).
During normal operation the active drive is displayed on the left half of the first line. The
left half of the second line displays the Battery Gauge Display (BGD). It provides
information on the remaining charge in the batteries. At full charge solid blocks fill in all
five segments between E (Empty) and F (Full). As the battery becomes discharged, the
furthest right segments will progressively disappear a half bar at a time until no segments
appear between E and F. At this level the word RECHARGE will appear on the second
line to indicate that the user should charge the batteries as soon as possible.

SECTION 3—JOYSTICK DESCRIPTIONS
Part No 1114808 17 MK5™EX™and MK5™TT-EX™ Electronics
The right half of the display is the Information Center. The Information Center displays
current data on the wheelchair. FIGURE 3.3 shows the factory default odometer display.
The top line shows the unit of measured MI (miles). The second line is the value, 0000
(total miles driven).
The Information Center can display:
If a fault is detected, the cause of the fault will be scrolled across the second line of the
display.
FIGURE 3.3 MPJ Joystick Switches and Indicators - LCD Display
Remote On/Off Input
The remote on/off input allows the power switch to be operated by an ability switch
(normally open momentary switch with mono plug). To use the remote on/off feature, the
Drive Select/On/Off switch must be in the ON position. Each activation of the ability
switch will alternately turn the joystick ON or OFF.
ITEM DESCRIPTION
Speedometer Current Wheelchair Speed - MPH/KMH
Trip Odometer Distance traveled since the wheelchair was last powered ON
Odometer Total Distance Traveled (Factory Default) - MI/KM
Trip Amp-Hour meter Battery Capacity consumed since the wheelchair was last powered ON -
AH
Battery Volts Current Battery Voltage - VOLT
Battery Current Battery current being used - AMP
Load Test Results Current battery condition based on a load test - BATT
DRIVE I MI
EF 0000

SECTION 4—REMOTE PROGRAMMER
MK5™EX™and MK5™TT-EX™ Electronics 18 Part No 1114808
SECTION 4—REMOTE
PROGRAMMER
Overview
NOTE: For this procedure, refer to FIGURE 4.1.
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 trouble shooting and permits calibration
of the control module.
FIGURE 4.1 Overview
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 (2) 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.
SAVE Key
SELECT Key
POWER Key
MENU Key
To Controller
DOWN Key
UP Key
LCD Display
Remote Programmer

SECTION 4—REMOTE PROGRAMMER
Part No 1114808 19 MK5™EX™and MK5™TT-EX™ Electronics
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.
Standard Program (Preset Programs)
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.
User Memory Values
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.
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 func-
tion 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.
UP 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.

SECTION 5—PERFORMANCE ADJUSTMENTS
MK5™EX™and MK5™TT-EX™ Electronics 20 Part No 1114808
SECTION 5—PERFORMANCE
ADJUSTMENTS
Speed and Response Screen
The first display screen shown after powering on the Remote Programmer is the Speed
and Response screen.
The first line shows the current drive. The second line shows the forward speed. The third
line shows the responsiveness of the wheelchair to changes in drive commands. The
fourth line is the entry point to the Main Menu.
Advanced Menu
Allows entry into the Main Menu where the Performance Adjust menu, Standard
Programs menu, Calibrations menu and Current Status menu are displayed. Press the
SELECT key to display the Main Menu.
Performance Menu
NOTE: For this procedure, refer to FIGURE 5.1.
Each of the standard joysticks and optional joysticks/devices has its own performance
menu. Only the menu for the particular configuration of the joystick and options
connected to the control module appear on the performance menu. Common to all of the
MK5 control systems are the following:
MENU ITEM DESCRIPTION
SPEED Adjusts the speed of the wheelchair. It affects forward speed, turning speed
and reverse speed simultaneously and uniformly. The fastest speed setting is
100%. Use the and to increase or decrease the speed of the wheel-
chair.
RESPONSE Adjusts the responsiveness or quickness of the wheelchair to changes in
drive commands. It affects acceleration, turn acceleration, turn decelera-
tion, braking, torque and turning speed. The value of the Response parame-
ter is set to 50% whenever a Standard Program is selected. It is good
practice to first select a standard program that is close to the desired per-
formance and then use Response to individualize the driving performance
to the user. The Response parameter will be ineffective in making large
changes in wheelchair responsiveness, e.g. changing a fast/responsive drive
into one suitable for users needing tremor dampening. Use the and
to increase or decrease the responsiveness of the wheelchair.
DRIVE 1
➜SPEED 95%
RESPONSE 50%
ADVANCED MENU