Invacare ProntoM41 User manual

Edition: 28.11.2012
Invacare
®
Pronto
®
M41 with SureStep
®
SERVICE MANUAL

SERVICE MANUAL Invacare®- PRONTO M41
2
These instructions contain information about:
Testing work
Repair Instructions
This manual is part of the instructions for use.
Service addresses
Invacare Austria GmbH
Herzog Odilostrasse 101
A-5310 Mondsee
Austria
(: [phone]
Fax: [phone]
@: [e-mail]
WWW: www.invacare.at
Invacare n.v.
Autobaan 22
B-8210 Loppem (Brugge)
Belgium
(: [phone]
Fax: [phone]
@: [e-mail]
WWW: www.invacare.be
Invacare AG
Benkenstraße 260
CH-4108 Witterswil
Switzerland
(: [phone]
Fax: [phone]
@: [e-mail]
WWW: www.invacare.ch
Invacare Aquatec GmbH
Alemannenstraße 10
88316 Isny
Deutschland
([phone]
Fax [phone]
@: [e-mail]
WWW: www.invacare-aquatec.de
Invacare A/S
Sdr. Ringvej 37
DK-2605 Brøndby
Danmark
((Kundeservice): [phone]
Fax (Kundeservice): [phone]
@: [e-mail]
WWW: www.invacare.dk
Invacare® SA
c/ Areny s/n
Polígon Industrial de Celrà
E-17460 Celrà (Girona)
ESPAÑA
(: [phone]
Fax: [phone]
@: [e-mail]
WWW: www.invacare.es
Invacare® Poirier SAS
Route de St Roch
F-37230 Fondettes
France
(: [phone]
Fax: [phone]
@: [e-mail]
WWW: www.invacare.fr
Invacare® Ltd
Pencoed Technology Park
Pencoed
Bridgend CF35 5HZ
United Kingdom
((Customer services): [phone]
Fax (Customer services): [phone]
@: [e-mail]
WWW: www.invacare.co.uk
Invacare Mecc San s.r.l.
Via dei Pini, 62
I - 36016 Thiene (VI)
Italia
(: [phone]
Fax: [phone]
@: [e-mail]
WWW: www.invacare.it

Invacare®- PRONTO M41 SERVICE MANUAL
3
Invacare Ireland Ltd.
Unit 5 Seatown Business Campus
Seatown Rd, Swords
County Dublin
Ireland
(: [phone]
Fax: [phone]
@: [e-mail]
WWW: www.invacare.ie
Invacare® AS
Grensesvingen 9
Postboks 6230
Etterstad
N-0603 Oslo
Norge
((Kundeservice): [phone]
Fax (Kundeservice): [phone]
@: [email protected]
@: [e-mail]
WWW: www.invacare.no
Invacare® B.V.
Celsiusstraat 46
NL-6716 BZ Ede
Nederland
(: [phone]
Fax: [phone]
@: [email protected]om
@: [e-mail]
WWW: www.invacare.nl
Invacare Lda
Rua Estrada Velha, 949
P-4465-784 Leça do Balio
Portugal
(: [phone]
(: [phone]
Fax: [phone]
@: [e-mail]
WWW: www.invacare.pt
Återförsäljare:
Invacare® AB
Fagerstagatan 9
S-163 91 Spånga
Sverige
Tillverkare:
Invacare® Deutschland GmbH
Kleiststraße 49
D-32457 Porta Westfalica
Deutschland
((Kundtjänst): [phone]
Fax (Kundtjänst): [phone]
@: [email protected]
@: [e-mail]
WWW: www.invacare.se
MÖLNDAL
(┐[phone]
Fax: [phone]
@: [e-mail]
LANDSKRONA
(: [phone]
Fax: [phone]
@: [e-mail]
OSKARSHAMN
(: [phone]
Fax: [phone]
@: [e-mail]
Eastern
european
countries
European Distributor
Organisation (EDO)
Kleiststraße 49
D-32457 Porta Westfalica
Deutschland
([phone]
Fax [phone]
@: [email protected]om
WWW: www.invacare.de

SERVICE MANUAL Invacare®- PRONTO M41
4
Contents
Chapter Page
1Introduction 6
1.1 General information ..................................................................................................................6
1.2 Notes on transport ....................................................................................................................6
1.3 Definition and representation of information and safety information in this manual ........7
1.4 Hazard symbols and symbols used.........................................................................................8
1.5 Images in this manual...............................................................................................................9
2Safety and fitting instructions 10
2.1 Controller settings / Repair or service ..................................................................................10
2.2 Operation information.............................................................................................................10
2.3 Before any inspection or repair work....................................................................................11
2.4 Personal safety equipment.....................................................................................................11
2.5 General safety information and information about fitting / removal..................................11
3Recommended tools 13
4Service plan (1x annually) 14
5Operational faults 15
5.1Troubleshooting......................................................................................................................15
5.1.1 Joystick diagnostics......................................................................................................15
5.1.2 Information gauge diagnostics......................................................................................16
5.1.3 Service Indicator Diagnostics........................................................................................17
5.1.4 Motor/Gearbox/Brake ...................................................................................................20
5.1.5 Battery...........................................................................................................................21
5.1.6 Battery Charger.............................................................................................................22
6Test procedures 23
6.1 Testing the motor....................................................................................................................23
6.2 Testing the electro-mechanical parking brake.....................................................................24
6.3 Rain test....................................................................................................................................25
6.4 Field load test...........................................................................................................................25
6.5 Checking battery charge level................................................................................................26
6.6 Checking an actuator..............................................................................................................27
7Repair work 28
7.1 Arms (Van seat) .......................................................................................................................28
7.1.1 Removing/Installing Arms.............................................................................................28
7.1.2 Replacing the Armrest Assembly..................................................................................29
7.2 Van Seat....................................................................................................................................30
7.2.1 Removing/Installing the Seat Assembly........................................................................30
7.2.2 Adjusting Seat Depth....................................................................................................31
7.2.3 Adjusting the seat height...............................................................................................32
7.2.4 Adjusting Seat Position on Seat Base ..........................................................................32
7.3 Standard seat...........................................................................................................................35
7.3.1 Replacing the standard backrest..................................................................................35
7.3.2 Standard seat................................................................................................................36
7.4 Replacing the lap belt .............................................................................................................37
7.4.1 Van seat........................................................................................................................37
7.5 Standard seat...........................................................................................................................38
7.6 Footboard.................................................................................................................................39
7.6.1 Removing/Installing the footboard assembly................................................................39
7.7 Wheels ......................................................................................................................................40
7.7.1 Engaging/Disengaging motor release lever..................................................................40

Invacare®- PRONTO M41 SERVICE MANUAL
5
7.7.2 Removing/Installing the front/rear casters ....................................................................40
7.7.3 Adjusting forks ..............................................................................................................41
7.7.4 Removing/Installing forks and/or caster assemblies ....................................................42
7.7.5 Removing/Installing the drive wheel .............................................................................43
7.8 Covers and frame ....................................................................................................................44
7.8.1 Removing/Installing the top cover.................................................................................44
7.8.2 Removing/Installing the front cover ..............................................................................45
7.8.3 Removing/Installing the controller cover.......................................................................46
7.8.4 Removing/Installing the swingarm assembly................................................................47
7.8.5 Removing/Installing the spring......................................................................................48
7.9 Batteries ...................................................................................................................................49
7.9.1 Warnings for handling and replacing batteries .............................................................49
7.9.2 Using the proper batteries.............................................................................................50
7.9.3 Removing/Installing batteries........................................................................................51
7.9.4 Connecting/Disconnecting battery cables.....................................................................53
7.9.4.1 Connecting battery cables .......................................................................................53
7.9.4.2 Disconnecting battery cables...................................................................................55
7.10 Motors.......................................................................................................................................56
7.10.1 Removing/Installing the motor ......................................................................................56
7.10.2 Engaging/Disengaging motor release lever..................................................................58
7.11 Electronics ...............................................................................................................................59
7.11.1 Removing/Installing the joystick (office style seat) .......................................................59
7.11.2 Repositioning the joystick mounting bracket (office style seat) ....................................60
7.11.3 Disconnecting/Connecting the joystick .........................................................................61
7.11.4 Replacing the controller................................................................................................62
7.11.5 Cable routing.................................................................................................................63
7.12 Updating the driving program................................................................................................64
8Accessoires 65
8.1 Installing/Removing the crutch/cane holder.........................................................................65
8.2 Further accessoires.................................................................................................................65

SERVICE MANUAL Invacare®- PRONTO M41
6
1 Introduction
1.1 General information
●Service and maintenance work must be carried out taking this service manual into account.
●It is imperative that you observe safety information.
●Information about operation or about general maintenance and care work on the mobility aid
should be taken from the operating manual.
●You can find information about ordering spare parts in the spare parts catalogue.
●Only use original Invacare® spare parts. The guarantee will become invalid if other spare parts
are used!
●We reserve the right to make any alterations on the grounds of technical improvements.
●The mobility aid may only be maintained and overhauled by qualified personnel.
●The minimum requirement for service technicians is suitable training, such as in the cycle or
orthopaedic mechanics fields, or sufficiently long-term job experience.
- Experience in the use of electrical measuring equipment (multimeters) is also a requirement.
- Special Invacare® training is recommended.
●Alterations to the mobility aid which occur as a result of incorrectly or improperly executed
maintenance or overhaul work lead to the exclusion of all liability on the side of INVACARE.
●If you have any problems or questions please contact Invacare® Service.
1.2 Notes on transport
●If the mobility aid has to be shipped back to the manufacturer for major repairs, you should
always use the original packaging for transport.
●Please attach a precise description of the fault.

Invacare®- PRONTO M41 SERVICE MANUAL
7
1.3 Definition and representation of information and safety
information in this manual
Different types of information and signal words are used throughout this manual.
HAZARD!
The signal word "HAZARD!" refers to immediate hazards.
●The following lines in italics refer to actions which serve to avoid such hazards.
WARNING!
The signal word "WARNING!" refers to possibly-occurring hazards which can lead to
death or serious injuries if they are not avoided.
●The following lines in italics refer to actions which serve to avoid such hazards.
ATTENTION!
The signal word "ATTENTION!" refers to possibly-occurring hazards which can lead to
minor injuries and/or material damage if they are not avoided.
●The following lines in italics refer to actions which serve to avoid such hazards.
CAUTION!
The signal word "CAUTION!" refers to hazards which could lead to material damage if they
are not avoided.
●The following lines in italics refer to actions which serve to avoid such hazards.
Note
The signal word "Note" is used to denote general information which simplifies the handling of
your product and refers to special functions.

SERVICE MANUAL Invacare®- PRONTO M41
8
1.4 Hazard symbols and symbols used
Different types of hazard symbols and symbols are used throughout this manual.
General hazards
This symbol warns you of general hazards!
●Always follow the instructions to avoid injury to the user or damage to the product!
BURN HAZARD!
This symbol warns you of the danger of chemical burns, for example due to the discharge
of battery acids!
●Always follow the instructions to avoid injury to the user or damage to the product!
DANGER OF CRUSHING!
This symbol warns you of crushing hazards due to inattentive working with heavy
components.
●Always follow the instructions to avoid injury to the user or damage to the product!
EXPLOSION HAZARD!
This symbol warns you of an explosion hazard, which can be caused by excessive tyre
pressure in a pneumatic tyre.
●Always follow the instructions to avoid injury to the user or damage to the product!
Wear safety shoes
The symbol refers to the requirement for wearing safety shoes.
●Wear standardised safety shoes during all work.
Wear eye protection
This symbol refers to the requirement for wearing eye protection, for example when
working with batteries.
●Wear eye protection when this symbol is shown.
Wear safety gloves
This symbol refers to the requirement for wearing safety gloves, for example when
working with batteries.
●Wear safety gloves when this symbol is shown.
Note
This symbol identifies general information which is intended to simplify working with your product
and which refers to special functions.
Always dispose used or damaged batteries correctly
The symbol refers to information for the correct disposal of used or damaged batteries.

Invacare®- PRONTO M41 SERVICE MANUAL
9
1.5 Images in this manual
The detailed images in this manual are given digits to identify various components. Component
numbers in text and operational instructions always relate to the image directly above.

SERVICE MANUAL Invacare®- PRONTO M41
10
2 Safety and fitting instructions
These safety instructions are intended to prevent accidents at work, and it is imperative that they
are observed.
WARNING!
This section 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.
2.1 Controller settings / Repair or service
●Set-up of the Electronic 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.
●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.
2.2 Operation information
●Performance adjustments should only be made by professionals of the healthcare field or
persons fully conversant with this process and the driverʹs capabilities. Incorrect settings could
cause injury to the driver, bystanders, damage to the chair and to surrounding property.
●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.
●DO NOT engage or disengage the motor release levers until the power is in the OFF position.
●Before performing any maintenance, adjustment or service verify that On/Off switch on the
joystick is in the off position.
●Avoid storing or using the wheelchair near open flame or combustible products. Serious injury
or damage to property may result.
●ALWAYS keep hands and fingers clear of moving parts to avoid injury.
●NEVER leave an unoccupied wheelchair on an incline.
●DO NOT attempt to lift the wheelchair by any removable (detachable) parts. Lifting by means of
any removable (detachable) parts of the wheelchair may result in injury to the user or damage
to the wheelchair.
●Make sure the detent balls of the quick-release pin are fully released beyond the outer edge of
the tube before returning the wheelchair to the user. Otherwise, injury and/or damage may
result.
●Keep detent balls clean.

Invacare®- PRONTO M41 SERVICE MANUAL
11
2.3 Before any inspection or repair work
●Read and observe this repair manual and the associated operating manual!
●Observe the minimum requirements for carrying out the work (see chapter entitled „General
information)!
2.4 Personal safety equipment
Safety shoes
The mobility device, and some of its components, are very heavy. These parts can result
in injuries to the feet if they are allowed to drop.
●Wear standardised safety shoes during all work.
Eye protection
It is possible that battery acid can be discharged when working on defective batteries or
when handling batteries improperly.
●Always wear eye protection when working on any defective or possibly defective batteries.
Safety gloves
It is possible that battery acid can be discharged when working on defective batteries or
when handling batteries improperly.
●Always wear acid-proof safety gloves when working on any defective or possibly defective
batteries.
2.5 General safety information and information about fitting / removal
WARNING: Danger of crushing!
Various components such as the drive unit, batteries, seat etc are very heavy. This results
in injury hazards to your hands!
●Please note the high weight of some components! This applies especially to the removal of
drive units, batteries and the seat.
WARNING!
Injury hazard if the vehicle starts moving unintentionally during repair work!
●Switch the power supply off (ON/OFF key)!
●Engage the drive!
●Before raising the vehicle, secure the wheels by blocking them with wedges!
ATTENTION!
Fire and burn hazard due to electrical short-circuit!
●The mobility device must be completely switched off before removal of voltage-carrying
components! To do this, remove the batteries.
●Avoid short-circuiting the contacts when carrying out measurements on voltage-carrying
components!
CAUTION!
Danger of burns from hot surfaces on the motor!
●Allow the motors to cool down before commencing work on them.

SERVICE MANUAL Invacare®- PRONTO M41
12
ATTENTION!
Injury hazard and danger of damage to vehicle due to improper or incomplete
maintenance work!
●Use only undamaged tools in good condition.
●Some moving parts are mounted in sockets with PTFE coating (Teflon™). Never grease these
sockets!
●Never use "normal" nuts instead of self-locking nuts.
●Always use correctly-dimensioned washers and spacers
●When reassembling, always replace any cable ties which were cut during dismantling.
●After completing your work / before renewed start-up of the mobility device, check all
connections for tight fitting.
●After completing your work / before renewed start-up of the mobility device, check all parts for
correct locking.
●Only operate the vehicle with the approved tyre pressures (see technical data).
●Check all electrical components for correct function. Please note that incorrect polarity can
result in damage to the electronics.
●Always carry out a trial run at the end of your work.
CAUTION!
Danger of injury and damage to property, if the maximum speed reduction on a
wheelchair with a lifter does not function correctly!
The wheelchair’s control unit must reduce the maximum possible speed as soon as the
lifter is raised.
●Test the maximum speed reduction for correct function after any maintenance work or
modifications to the wheelchair.
Note
Mark all current settings for the mobility aid (seat, armrests, backrest etc.), and the associated
cable connecting plugs, before dismantling. This makes reassembly easier.
All plugs are fitted with mechanical safety devices which prevent release of the connecting plugs
during operation. To release the connecting plugs the safety devices must be pressed in. When
reassembling ensure that these safety devices are correctly engaged.
WARNING!
Any changes to the drive program can affect the driving characteristics and the tipping
stability of the vehicle!
●Changes to the drive program may only be carried out by trained Invacare® specialist
dealers!
●Invacare® supplies all mobility aids with a standard drive program ex-works. Invacare® can
only give a warranty for safe vehicle driving behaviour - especially tipping stability - for this
standard drive program!

Invacare®- PRONTO M41 SERVICE MANUAL
13
3 Recommended tools
The following tools are recommended for servicing this wheelchair:
●5 mm ball head 10-inch t-handle allen wrench
●Flat tip screwdriver
●½-inch deep socket and 3/8-inch ratchet
●Small and medium Phillips® screwdriver
●Needle nose pliers
●Wire cutters
●Tie-wrap assortment
●Dead blow hammer
●¼-inch to ½-inch wrenches
●digital multimeter with resistance measurement

SERVICE MANUAL Invacare®- PRONTO M41
14
4 Service plan (1x annually)
These adjustments should be made whenever this product is serviced, especially as part of the
initial unit setup. Follow these procedures:
CAUTION!
Danger of injury and damage to property, if the maximum speed reduction on a
wheelchair with a lifter does not function correctly!
The wheelchair’s control unit must reduce the maximum possible speed as soon as the
lifter is raised.
•Test the maximum speed reduction for correct function after any maintenance work or
modifications to the wheelchair.
üEnsure that the wheelchair rolls straight (no excessive drag or pull to one side).
üEnsure that the arms are secure but easy to release and adjustment levers engage properly.
üEnsure that adjustable height arms operate and lock securely.
üEnsure armrest pads sit flush against arm.
üEnsure seat is secured to wheelchair frame.
üEnsure seat release latch is not worn and is functional. Replace if necessary.
üClean upholstery and armrests.
üEnsure no excessive side movement or binding occurs when drive wheels are lifted and spun
when disengaged (freewheeling).
üInspect caster assembly has proper tension when caster is spun. Caster should come to a
gradual stop.
üLoosen/tighten caster locknut if wheel wobbles noticeably or binds to a stop.
üEnsure casters are free of debris.
üEnsure all caster/wheel/fork/headtube fasteners are secure.
üInspect tires for flat spots and wear.
üEnsure all fasteners on clothing guards are secure.
üEnsure seat and/or back upholstery have no rips and do not sag. Replace if necessary.
üInspect seat positioning strap for any signs of wear. Ensure buckle latches. Verify hardware
that attaches strap to frame is secure and undamaged. Replace if necessary.
üEnsure wheel mounting nuts are secure on drive wheels.
üCheck pneumatic tires for proper inflation.
üInspect motor brushes and gearbox coupling.
üEnsure arm pivot points are not worn and/or loose. Replace if necessary.
üInspect for any loose hardware on the wheelchair.
üInspect charger AC power cord for damage. Replace if necessary.
üCheck that all labels are present and legible. Replace if necessary.
üInspect electrical components for signs of corrosion. Replace if corroded or damaged.

Invacare®- PRONTO M41 SERVICE MANUAL
15
5 Operational faults
Different power modules can be installed in the mobility aid in connection with different remotes.
The rectification of operational faults depends on the installed power module in each case.
Note
The tables for rectification of operational faults listed in the following chapters are only an excerpt
from the original manufacturer's manuals.
You can obtain the original manuals from Invacare®.
If you have problems with the mobility aid, please proceed as follows:
•First assess the possible cause of the problem using the following table.
•Check the remote status display. Evaluate the error code.
•Carry out the necessary checks and repairs as recommended in the following table.
5.1 Troubleshooting
Note
For additional troubleshooting information and explanations of error codes, refer to the individual
electronics manuals supplied with each wheelchair.
Chair
veers
left/right
Sluggish
turn/
performance
Casters
flutter Squeaks and
rattles
Looseness
in chair Chair 3 wheels Solutions
x x x x
If pneumatic,
check tires for
correct and
equal pressure.
x x x x x Check for loose
stem nuts/bolts.
x x
Check that both
casters contact
ground at the
sametime.
5.1.1 Joystick diagnostics
The joystick information gauge and the service indicator give indications of the type of fault or error
detected by the control module. When a fault is detected, the wheelchair may stop and not drive.
The LEDs on the information gauge may flash in a particular pattern or the service indicator light will
flash. The number or type of flashes indicates the nature of the error. If multiple errors are found,
only the first error encountered by the control module will be displayed.

SERVICE MANUAL Invacare®- PRONTO M41
16
5.1.2 Information gauge diagnostics
Display Description Definition Comments
1 Informtion gauge
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 Outof-
Neutral-at-Power-Up
mode.
Release the
joystick back to
Neutral.

Invacare®- PRONTO M41 SERVICE MANUAL
17
5.1.3 Service Indicator Diagnostics
Number
of Flashes Diagnostics Code Error Code Description Sub Code* Details of Error Code Possible Solution
1
E01
User Fault
00
Stall Timeout or
user error.
Release joystick to
neutral and try again.
2
E02
Battery Fault
00
Recharge batteries
or replace.
Check the batteries
and cable. Try
charging the
batteries. Batteries
may require
replacing.
3
E03
Left Motor
Fault
00
Left Motor Short
Circuit
Check the left motor,
connections and
motor cable.
01
Left Motor Open
Circuit
02 Left Motor
Connection Fault B-
03
Motor Terminal
Connected to B+
04
Left Motor Voltage
Fault
05
Left Motor Bridge
Fault
06
Too Many
Hardware Current
Limit Events
07
Current Offset Out
of Range
08
Hardware Current
Limit Fault
4
E04
Right Motor
Fault
00
Right Motor Short
Circuit
Check the right
motor, connections
and motor cable.
01
Right Motor Open
Circuit
02
Right Motor
Connection Fault B-
03
Motor Terminal
Connected to B+
04 Right Motor Voltage
Fault
05
Right Motor Bridge
Fault
06
Too Many
Hardware Current
Limit Events
07 Current Offset Out
of Range

SERVICE MANUAL Invacare®- PRONTO M41
18
Number
of Flashes Diagnostics Code Error Code Description Sub Code* Details of Error Code Possible Solution
08 Hardware Current
Limit Fault
5
E05
Left Park
Brake Fault
00
Left Park Brake
Drive-Time Test
Failed
Check the left park
brake connections
and cable.
01
Left Park Brake
Output Enabled
When Wheelchair
Idle
02
Left Park Brake
Output Did not
Enable When
Entering Drive
Mode
03
Left Park Brake
fault during power-
up testing
04
Left park brake
feedback low
during drive (park
brake short)
6
06
Right Park
Brake Fault
00
Right Park Brake
Drive-Time Test
Failed
Check the right park
brake connections
and cable.
01
Right Park Brake
Output Enabled
When Wheelchair
Idle
02
Right Park Brake
Output Did not
Enable When
Entering Drive
Mode
03
Right Park Brake
fault during power-
up testing
04
Right park brake
feedback low
during drive (park
brake short)
7
E07
Remote Fault
00
Local SR Fault
(CPU, EEPROM,
etc.)
Check the
communications bus,
connections and
wiring. Replace the
remote.
01 Joystick fault at the
remote
02
Speed pot fault at
the remote

Invacare®- PRONTO M41 SERVICE MANUAL
19
Number
of Flashes Diagnostics Code Error Code Description Sub Code* Details of Error Code Possible Solution
8 E08 Controller
Fault 00 Controller fault Check connections and wiring. Replace
power module.
01
RAM fault
02 ROM fault
03
CPU fault
04
EEPROM fault
05
Watchdog fault
06
Stack fault
07 Software fault
08
Power-up testing
fault
09 Relay fault or
precharge fault
10
Bridge fault or
disable all fault
11
Electronics fault:
Thermistor
12
Calibration setting
fault
9
E09
Communicati
ons Fault
00
Remote connection
lost
Check connections
and wiring. Replace
Bus cable.
01 Low communication
mode
10
General
Fault
00
General fault
Check all
connections and
wiring. Contact
Invacare Technical
Service.
11
Incompatible/
incorrect
Remote
00
Incompatible/
incorrect Remote
Wrong type of
remote connected.
Ensure the branding
of the joystick
matches that of
controller unit.

SERVICE MANUAL Invacare®- PRONTO M41
20
5.1.4 Motor/Gearbox/Brake
PROBLEM PROBABLE
CAUSE SOLUTIONS Documentation
Motor makes a
clicking noise.
Bad bearings.
If bearings are bad, replace
motor.
See chapter
8.10.1.
Raised commutator
plate inside of motor.
Ohm out motor and replace
motor if high reading is present.
Normal reading is
0.5-5 Ohms.
See chapter 7.1
or chapter 8.10.1.
Grinding noise
or motor is
locking up.
Bad bearings. Bad
gears.
Replace motor/gearbox.
See chapter
8.10.1
Motors stall
and starts up
again.
Current rollback.
Stop driving and let electronics
cool.
Motor chatters
or runs
erratically, or
only one motor
turns.
Damaged connector
or worn brushes.
Bad motor or gear
box.
Ohm out motors. Replace
motor/gearbox if high reading is
present. Normal reading is 0-5
Ohms.
See chapter 7.1,
chapter 7.2 or
chapter 8.10.1.
Motor release lever
is disengaged.
Engage motor release levers.
See chapter 8.7.1.
Controller
malfunction.
Check for error codes with
programmer.
See electronics
manual.
Wheelchair
veers to the left
or right when
driving on level
surface.
Uneven tire
pressure. Motors out
of balance.
Inflate tires. Replace tires if
worn.
Use programmer to balance
motors.
Gearbox is
leaking fluid.
Bad seal around
drive shaft.
Loose hardware.
If seal is bad, replace
motor/gearbox.
If loose hardware is found
retighten hardware.
See chapter 7.2
or chapter 8.10.1.
Excessive
clicking
coming from
motor/gearbox.
Bad bearing in motor
or gearbox.
Replace motor/gearbox:
See chapter
8.10.1.
Loose wheel
hardware. Tighten hardware, (use removable Loctite™on
hardware).
Follow torque
settings in this
manual.
Rough driving.
Gearbox shaft
movement or bent
shaft.
Replace motor/gearbox.
See chapter
8.10.1.
Motor stutters.
Poor connection or
worn brushes.
Check DCL connectors. Check
motor and replace if necessary.
See chapter
8.10.1.
Motor fails to
start after
initial
installation.
Battery voltage is too
low.
Bad connection.
Brake disengaged.
Check batteries and recharge if
necessary.
Check connector. Engage
brake.
See chapter 8.9.
Motor is
running then
fails to restart
Heavy load on the
motors forcing
controller into the
current rollback
Leave power On and allow
controller to count down, and
recharge the batteries overnight
with power On.