Invacare M50, M61, M51 User Manual

Service Manual

Pronto® Series

M50™

M51™

M61™

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

RECOMMENDED TOOLS

WARNING

A QUALIFIED TECHNICIAN MUST PERFORM ALL PROCEDURES IN THIS SERVICE MANUAL.

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.

RECOMMENDED TOOLS

The following tools are recommended for servicing this wheelchair:

•Invacare Power Mobility Field Service Kit - p/n 1125222

•5mm 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

REFERENCE DOCUMENTS

DOCUMENT	PART NUMBER
M50/51/61 Owner’s Manual	1125085
MK5™NX™Electronics Manual	1110532
Quad-Link Instruction Sheet (for assemblies after 4/6/06)	1134844
MK6i™Field Reference Guide	1141471
MK6i Service Manual	1143203

NOTE: Updated versions of this manual are available on www.invacare.com.

Pronto® Series

2

Part No. 1125075

TABLE OF CONTENTS
TABLE OF CONTENTS
RECOMMENDED TOOLS ....................................................................	2
REFERENCE DOCUMENTS .................................................................	2
SPECIAL NOTES ................................................................................	8
LABEL LOCATION ..........................................................................	10
TYPICAL PRODUCT PARAMETERS ..................................................	11
SECTION 1—GENERAL GUIDELINES .................................................	13
Controller Settings/Repair or Service .................................................................................................	13
Operation Information............................................................................................................................	13
Tire Pressure .............................................................................................................................................	14
Batteries......................................................................................................................................................	14
Charging Batteries ...............................................................................................................................	15
Grounding Instructions ...........................................................................................................................	15
Rain Test.....................................................................................................................................................	16
Weight Training ........................................................................................................................................	16
Weight Limitation.....................................................................................................................................	16
SECTION 2—EMI INFORMATION .....................................................	17
SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING ....................	19
Safety Inspection Checklists...................................................................................................................	19
All Wheelchairs ....................................................................................................................................	19
Additional Requirements for M61 Wheelchairs...........................................................................	20
Troubleshooting........................................................................................................................................	20
Wheels ...................................................................................................................................................	20
About Joystick Diagnostics ..........................................................................................................	20
SPJ+ Information Gauge Display Diagnostics ...........................................................................	21
SPJ Information Gauge Display Diagnostics ...................................................................................	22
Diagnostic Codes.................................................................................................................................	23
Motor/Gearbox/Brake ........................................................................................................................	25
Battery ....................................................................................................................................................	27
Battery Charger....................................................................................................................................	28
M61 Only ...............................................................................................................................................	29
Checking Battery Charge Level.............................................................................................................	29
Field Load Test..........................................................................................................................................	30
Motor Testing............................................................................................................................................	31
SECTION 4—WHEELCHAIR OPERATION ...........................................	32
Turning the Power On/Off.....................................................................................................................	32
M50 and M51 Wheelchairs Manufactured Before 8/15/05 ........................................................	32
M50/M51 Wheelchairs Manufactured After 8/14/05 and all M61 Wheelchairs....................	33
Using the Joystick to Drive the Wheelchair ......................................................................................	33
Adjusting the Speed .................................................................................................................................	35
M50 and M51 Wheelchairs Manufactured Before 8/15/05 ........................................................	35
M50/M51 Wheelchairs Manufactured After 8/14/05 and All M61 Wheelchairs...................	35
Using the Horn..........................................................................................................................................	36
M50 and M51 Wheelchairs Manufactured Before 8/15/05 ........................................................	36

Part No. 1125075

3

Pronto® Series

TABLE OF CONTENTS

TABLE OF CONTENTS
M50/M51 Wheelchairs Manufactured After 8/14/05 and All M61 Wheelchairs	...................37
Elevating the Seat......................................................................................................................................	37
SPJ™Joystick Switches and Indicators .................................................................................................	39
On/Off Toggle Switch .........................................................................................................................	39
Speed Control Knob ...........................................................................................................................	39
Joystick....................................................................................................................................................	39
Charger/Programming Input..............................................................................................................	39
Information Gauge Display ................................................................................................................	40
SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators .................................................................	41
On/Off Button ......................................................................................................................................	42
Speedometer.........................................................................................................................................	42
Speed Control Buttons.......................................................................................................................	42
Mode Button .........................................................................................................................................	42
Joystick....................................................................................................................................................	43
Charger/Programming Input..............................................................................................................	43
Service Indicator...................................................................................................................................	43
Information Gauge Display ................................................................................................................	43
SECTION 5—ARMS .........................................................................	44
Removing/Installing Van Seat Arm........................................................................................................	44
Adjusting Van Seat Arm Width.............................................................................................................	44
Adjusting Van Seat Arm Angle ..............................................................................................................	45
Adjusting Van Seat Arm Height (Adjustable Height Arms Only)..................................................	45
Replacing Van Seat Armrest Assembly................................................................................................	46
Removing/Installing Flip Back Armrest ................................................................................................	47
Adjusting the Flip Back Armrest Height..............................................................................................	48
SECTION 6—VAN SEAT ...................................................................	49
Adjusting the Back Angle ........................................................................................................................	49
Semi-Recline Back Angle ....................................................................................................................	49
Fold Down Back Angle .......................................................................................................................	49
Adjusting the Headrest (Semi-Recline Only) .....................................................................................	50
Removing/Installing the Seat Assembly................................................................................................	50
Removing ...............................................................................................................................................	50
Installing..................................................................................................................................................	50
Adjusting Seat Depth ...............................................................................................................................	51
Adjusting the Seat Height .......................................................................................................................	53
M50/M51 Wheelchairs........................................................................................................................	53
M61 Wheelchairs .................................................................................................................................	54
Adjusting Seat Position on Seat Base...................................................................................................	56
Replacing the Seat Positioning Strap ....................................................................................................	58
SECTION 7—ASBA SEAT .................................................................	59
Removing/Installing the Seat Assembly................................................................................................	59
Removing ..........................................................................................................................................	59
Installing ............................................................................................................................................	59
Adjusting the Seat Height .......................................................................................................................	60
M50/51 Wheelchairs Only.................................................................................................................	60

Pronto® Series

4

Part No. 1125075

TABLE OF CONTENTS
TABLE OF CONTENTS
M61 Wheelchairs .................................................................................................................................	62
Removing/Installing the Seat Pan...........................................................................................................	63
Adjusting the Seat Width........................................................................................................................	64
Removing/Installing the Seat Frame......................................................................................................	64
Removing ...............................................................................................................................................	64
Installing..................................................................................................................................................	64
Adjusting the Seat Position.....................................................................................................................	65
Removing/Installing the Seat Positioning Strap ..................................................................................	66
Removing/Installing the Back Upholstery............................................................................................	67
Removing/Installing/Changing the Back Cane Height.......................................................................	67
Removing ..........................................................................................................................................	67
Installing ............................................................................................................................................	68
Adjusting the Back Angle ........................................................................................................................	71
SECTION 8—FRONT RIGGINGS/FOOTBOARD ....................................	73
Installing/Removing Front Riggings .......................................................................................................	73
Installing..................................................................................................................................................	73
Removing ...............................................................................................................................................	74
Adjusting Footrest Height ......................................................................................................................	74
Model PHWH93 Front Riggings .......................................................................................................	74
Model PH904A and PHAL4A Front Riggings ................................................................................	75
Replacing Heel Loops ..............................................................................................................................	75
Raising/Lowering Elevating Front Riggings ..........................................................................................	76
Adjusting/Replacing Telescoping Front Rigging Supports................................................................	76
Van Seats................................................................................................................................................	76
ASBA Seat..............................................................................................................................................	77
Removing/Installing the Footboard Assembly....................................................................................	78
Removing ...............................................................................................................................................	78
Installing..................................................................................................................................................	79
Adjusting the Footboard Assembly ......................................................................................................	79
Angle .......................................................................................................................................................	79
Depth......................................................................................................................................................	80
SECTION 9—WHEELS .......................................................................	81
Replacing the Front/Rear Casters.........................................................................................................	81
Adjusting Caster Assembly.....................................................................................................................	82
Removing/Installing the Front/Rear Caster Assemblies...................................................................	83
Removing ...............................................................................................................................................	83
Installing..................................................................................................................................................	83
Removing/Installing the Front Headtube Assembly..........................................................................	83
Removing/Installing the Drive Wheel ..................................................................................................	84
Removing the Drive Wheel...............................................................................................................	84
Installing the Drive Wheel .................................................................................................................	84
Replacing the 2-Piece Wheel Rim and/or the Foam Filled or Pneumatic Tires.........................	85
SECTION 10—SHROUDS AND FRAME ..............................................	87
Removing/Installing the Top Shroud ....................................................................................................	87
Removing ...............................................................................................................................................	87

Part No. 1125075

5

Pronto® Series

TABLE OF CONTENTS

TABLE OF CONTENTS
Installing..................................................................................................................................................	87
Removing/Installing the Side Shrouds ..................................................................................................	88
Removing ...............................................................................................................................................	88
Installing..................................................................................................................................................	88
Removing/Installing the Front Shroud .................................................................................................	89
Removing ...............................................................................................................................................	89
Installing..................................................................................................................................................	89
Removing/Installing the Inner Shrouds ................................................................................................	90
Removing ...............................................................................................................................................	90
Installing..................................................................................................................................................	90
Removing/Installing the Pivot Tube ......................................................................................................	91
Removing ...............................................................................................................................................	91
Installing..................................................................................................................................................	92
Removing/Installing the SureStep Spring .............................................................................................	93
Removing ...............................................................................................................................................	93
Installing..................................................................................................................................................	93
Removing/Installing the Walking Beam................................................................................................	93
Removing ...............................................................................................................................................	93
Installing..................................................................................................................................................	93
Removing/Installing the Elevate Actuator ...........................................................................................	94
Removing ...............................................................................................................................................	94
Installing..................................................................................................................................................	95
Removing/Installing the Actuator Switch Sensor ..............................................................................	97
Removing ...............................................................................................................................................	97
Installing..................................................................................................................................................	97
SECTION 11—BATTERIES ................................................................	98
Warnings For Handling and Replacing Batteries ...............................................................................	98
Using the Proper Batteries.....................................................................................................................	99
Removing/Installing Batteries from/into Battery Tray......................................................................	99
Removing ............................................................................................................................................	100
Installing...............................................................................................................................................	100
Connecting/Disconnecting Battery Cables......................................................................................	101
Connecting Battery Cables.............................................................................................................	101
Disconnecting Battery Cables........................................................................................................	104
Charging Batteries.................................................................................................................................	104
Battery Charger Operation.................................................................................................................	105
On-Board Battery Charger.............................................................................................................	106
Charging Using An Independent Charger Plugged Into The Joystick ...................................	107
Replacing the On-Board Battery Charger Fuse..............................................................................	108
Replacing the On-Board Battery Charger .......................................................................................	109
SECTION 12—MOTORS ..................................................................	112
Removing/Installing the Motor ...........................................................................................................	112
Engaging/Disengaging Motor Release Lever ....................................................................................	114
Removing/Installing the Motor Release Lever ................................................................................	115
Replacing Motor Brushes.....................................................................................................................	116
Electro-Mechanical Parking Brake Testing.......................................................................................	118

Pronto® Series

6

Part No. 1125075

TABLE OF CONTENTS
TABLE OF CONTENTS
SECTION 13—ELECTRONICS ..........................................................	120
Removing/Installing the Joystick .........................................................................................................	120
Removing ............................................................................................................................................	120
Installing...............................................................................................................................................	120
Repositioning the Joystick Mounting Bracket .................................................................................	121
Van Seat...............................................................................................................................................	121
ASBA Seat...........................................................................................................................................	122
Disconnecting/Connecting the Joystick............................................................................................	123
Disconnecting ....................................................................................................................................	123
Connecting .........................................................................................................................................	123
Adjusting the Quad-Link Retractable Mount ..................................................................................	124
Adjusting Lock/Release Tension....................................................................................................	124
Replacing the Controller .....................................................................................................................	125
Wire Routing..........................................................................................................................................	127
SECTION 14—ACCESSORIES ..........................................................	128
Installing/Removing the Crutch/Cane Holder.................................................................................	128
Installing...............................................................................................................................................	128
Installing/Removing the Oxygen Holder ..........................................................................................	129
Installing/Removing/Using the Walker Holder ...............................................................................	130
Installing/Removing the Walker Holder ......................................................................................	130
Using the Walker Holder................................................................................................................	130
LIMITED WARRANTY ...................................................................	131

Part No. 1125075

7

Pronto® Series

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.

WHEELCHAIR USER

As a manufacturer of wheelchairs, Invacare endeavors to supply a wide variety of wheelchairs to meet many needs of the end user. However, final selection of the type of wheelchair to be used by an individual rests solely with the user and his/her healthcare professional capable of making such a selection.

WHEELCHAIR TIE-DOWN RESTRAINTS AND SEAT RESTRAINTS

Wheelchair users should not be transported in vehicles of any kind while in wheelchairs. As of this date, the Department of Transportation has not approved any tie-down systems for transportation of a user while in a wheelchair, in a moving vehicle of any type.

It is Invacare’s position that users of wheelchairs should be transferred into appropriate seating in vehicles for transportation and use be made of the restraints made available by the auto industry. Invacare cannot and does not recommend any wheelchair transportation systems.

WARNING

ALWAYS wear your seat positioning strap. The seat positioning strap is a positioning belt only. It is not designed for use as a safety device withstanding high stress loads such as auto or aircraft safety belts. If signs of wear appear, the belt MUST be replaced IMMEDIATELY.

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.

Pronto® Series

8

Part No. 1125075

SPECIAL NOTES

WARNING CONTINUED

The drive behavior initially experienced by the user may be different from other chairs previously used. This power wheelchair has Invacare’s SureStep® technology, a feature that provides the chair with optimum traction and stability when driving forward over transitions and thresholds of up to 2-inches.

The following warnings apply specifically to the SureStep Feature.

•DO NOT use on inclines greater than 9°.

•DO NOT use on inclines with wet, slippery, icy or oily surfaces. This may include certain painted or otherwise treated wood surfaces.

•DO NOT traverse down ramps at high speed. Doing so will reduce traction and increase stopping distance.

•The end user’s weight can materially affect traction on sloped surfaces. Great care should be taken when traversing such slopes.

To determine and establish your particular safety limits, practice use of this product on various sloping surfaces in the presence of a qualified healthcare provider before attempting active use of this wheelchair. Other general warnings listed within this document also apply.

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. 1125075

9

Pronto® Series

LABEL LOCATION

LABEL LOCATION

The serial number label is located inside of the front frame. The top shroud and front battery need to be removed to view the label.

M50/M51 Wheelchairs

M61 Wheelchairs

Pronto® Series			10	Part No. 1125075

TYPICAL PRODUCT PARAMETERS

TYPICAL PRODUCT PARAMETERS

	MEDIUM		SEMI-RECLINE					OFFICE STYLE,		ASBA
	BACK				BACK			SEMI-RECLINE
								BACK
SEAT WIDTH RANGE:	18 inches		16		18		20	18 inches		16 - 20 inches
			inches		inches		inches
SEAT DEPTH:	16 - 18		16 - 18 inches				18 - 20	16 - 18 inches		16 - 20 inches
	inches						inches
BACK HEIGHT:	16½ inches				19 inches			23½ inches		16 - 20 inches
								(w/ headrest)
								18¾ inches
								(w/o headrest)
BACK ANGLE RANGE:	95° to 100°			90 to 114°				90 to 115°		80° to 100°
	in 5°									in 5° increments
	increments
UPHOLSTERY:	Light Grey		Light Grey Vinyl, Grey					Charcoal Grey Vinyl		Black Nylon
	Vinyl		Cloth, Tan Vinyl							Back with Seat
										Pan
SEAT-TO-FLOOR
WITH FOOTBOARD
(M50/M51):		20 to 24 inches						19 to 23 inches		17-21 inches
WITH FRONT RIGGINGS
(M50/M51):		22 to 24 inches						19-23 inches		19-21 inches
WITH ELEVATING SEAT
(M61):	21-23 inches + up to 5 inches of Elevate							19 to 21 inches + up		17 to 19 inches
								to 5 inches of		+ up to 5 inches
								Elevate		of Elevate
OVERALL WIDTH:					24 inches (Without Joystick)
OVERALL HEIGHT:	35 to 43¾ inches							41½ inches
OVERALL LENGTH:					34 inches (With Footboard Folded)
			39½ inches (With Footboard Extended)
DRIVE WHEELS/
TIRES:					10 x 3-inch (Flat Free inserts)
CASTER:			6 x 2-inch Front/Rear w/Precision Sealed Bearings
FOOTRESTS/			Flip Up, Depth and Height Adjustable, Footboard,
LEGRESTS:			Swingaway Front Rigging, Elevating Legrest
*WEIGHT
W/O BATTERIES:							145 to 170 lbs
W/BATTERIES (U1):							192 to 217 lbs
SHIPPING
BASE W/O BATTERIES:							107 lbs
BASE WITH BATTERIES:							154 lbs
MEDIUM BACK:							40 lbs
SEMI-RECLINE:							64 lbs
OFFICE STYLE:							44 lbs
ASBA (20 X 20 X 20):							48 lbs

Part No. 1125075

11

Pronto® Series

TYPICAL PRODUCT PARAMETERS

	MEDIUM	SEMI-RECLINE		OFFICE STYLE,	ASBA
	BACK	BACK		SEMI-RECLINE
				BACK
ARMRESTS:		Adjustable Width, Angle, Heights and Depth
BATTERIES:		U1 - Quantity 2
WEIGHT LIMITATION:			300 lbs
PERFORMANCE
SPEED:		0 to 4.3 m.p.h.
TURNING RADIUS:		19½ inches
**RANGE (VARIABLE):		up to 12 miles

*NOTE: Includes seating systems and accessories.

**NOTE: Values for range are calculated for maximum chair weight rating using largest batteries applicable (U1), per test procedures described in ANSI/RESNA WC/VOL2-1998 Section 4 and meet federal reimbursement requirements for this product. While considered typical, they are derived based on certain ideal conditions. Variances in battery condition, user weight, usage pattern or overall terrain conditions will result in actual values for range that differ from these stated values. Users should become accustomed to how their unique conditions impact their individual results. Users should become familiar with the battery discharge indicator on the joystick to determine the range of their wheelchair. Refer to Battery Charger Operation on page 105 for more information about the battery discharge indicator.

Pronto® Series

12

Part No. 1125075

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 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.

Operation Information

Performance adjustments should only be made by professionals of the healthcare 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 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.

ALWAYS shift your weight in the direction you are turning. DO NOT shift your weight in the opposite direction of the turn. Shifting your weight in the opposite direction of the turn may cause the inside drive wheel to lose traction and the wheelchair to tip over.

DO NOT shift your weight or sitting position toward the direction you are reaching as the wheelchair may tip over.

DO NOT engage or disengage the motor release levers until the power is in the Off position.

DO NOT operate on roads, streets or highways.

Part No. 1125075

13

Pronto® Series

SECTION 1—GENERAL GUIDELINES

DO NOT climb, go up or down ramps or traverse slopes greater than 9°.

DO NOT attempt to move up or down an incline with a water, ice or oil film.

DO NOT attempt to drive over curbs or obstacles. Doing so may cause your wheelchair to turn over and cause bodily harm or damage to the chair.

DO NOT leave the power button in the On position when entering or exiting your wheelchair.

DO NOT stand on the frame of the wheelchair.

DO NOT stand on the flip-up footboard, otherwise damage may occur. When getting in or out of the wheelchair, make sure that the flip-up footboard is in the upward position.

ALWAYS wear your seat positioning strap. The seat positioning strap is a positioning belt only. It is not designed for use as a safety device withstanding high stress loads such as auto or aircraft safety belts. If signs of wear appear, belt MUST be replaced IMMEDIATELY.

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 operating the wheelchair. Otherwise, injury and/or damage may result.

Keep detent balls clean.

Tire Pressure

DO NOT release wheelchair from service unless it has the proper tire pressure (P.S.I.). DO NOT overinflate the tires. Failure to follow these recommendations may cause the tire to explode and cause bodily harm. The recommended tire pressure is listed on the side wall of the tire.

Batteries

The warranty and performance specifications contained in this manual are based on the use of deep cycle gel cell or sealed lead acid batteries. Invacare strongly recommends their use as the power source for this unit.

Pronto® Series

14

Part No. 1125075

SECTION 1—GENERAL GUIDELINES

Carefully read battery/battery charger information prior to installing, servicing or operating your wheelchair.

Charging Batteries

DANGER

When using an extension cord, use only a three wire extension cord having at least 16 AWG (American Wire Gauge) wire and the same or higher electrical rating as the device being connected. Use of improper extension cord could result in risk of fire and electric shock. Three prong to two prong adapters should not be used. Use of three prong adapters can result in improper grounding and present a shock hazard to the user.

NEVER attempt to recharge the batteries by attaching cables directly to the battery terminals.

DO NOT attempt to recharge the batteries and operate the wheelchair at the same time.

DO NOT operate wheelchair with extension cord attached to the AC cable.

DO NOT attempt to recharge the batteries when the wheelchair has been exposed to any type of moisture.

DO NOT attempt to recharge the batteries when the wheelchair is outside.

DO NOT sit in the wheelchair while charging the batteries.

DO NOT attempt to recharge batteries using both the on-board battery charger and an independent battery charger (plugged into the joystick charger port) at the same time. Doing so will reduce the life of the batteries.

Read and carefully follow the manufacturer’s instructions for each charger (supplied or purchased). If charging instructions are not supplied, consult a qualified technician for proper procedures.

Ensure the pins of the extension cord plug are the same number, size, and shape as those on the charger.

DO NOT under any circumstances cut or remove the round grounding plug from the charger AC cable plug or the extension cord plug.

Grounding Instructions

DO NOT, under any circumstances, cut or remove the round grounding prong from any plug used with or for Invacare products. Some devices are equipped with three-prong (grounding) plugs for protection against possible shock hazards and fire. Where a twoprong wall receptacle is encountered, it is the personal responsibility and obligation of the customer to contact a qualified electrician and have the two-prong receptacle replaced with a properly grounded three-prong wall receptacle in accordance with the National Electrical Code. If you must use an extension cord, use only a three-wire extension cord having the same or higher electrical rating as the device being connected. In addition, Invacare has placed RED/ORANGE warning tags on some equipment. DO NOT remove these tags.

Part No. 1125075

15

Pronto® Series

SECTION 1—GENERAL GUIDELINES

Rain Test

Invacare has tested its power wheelchairs in accordance with ISO 7176 “Rain Test.” This provides the end user or his/her assistant sufficient time to remove his/her power wheelchair from a rain storm and retain wheelchair operation.

DO NOT leave power wheelchair in a rain storm of any kind.

DO NOT use power wheelchair in a shower.

DO NOT store power wheelchair in a damp area for an extended period of time.

Direct exposure to excessive rain or dampness may cause the chair to malfunction electrically and mechanically, may cause the chair to prematurely rust and/or may damage the upholstery.

Check to ensure that the RED and GREY battery terminal caps are secured in place, joystick boot is not torn or cracked where water can enter and that all electrical connections are secure at all times.

DO NOT use the wheelchair if the joystick boot is torn or cracked. If the joystick boot becomes torn or cracked, replace IMMEDIATELY.

Weight Training

Invacare does not recommend the use of its wheelchairs as a weight training apparatus. Invacare wheelchairs have not been designed or tested as a seat for any kind of weight training. If occupant uses said wheelchair as a weight training apparatus, Invacare shall not be liable for bodily injury and the warranty is void.

Weight Limitation

The M50, M51 and M61 wheelchairs with SureStep have a weight limitation of 300 lbs.

Pronto® Series

16

Part No. 1125075

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. 1125075

17

Pronto® Series

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.

Pronto® Series

18

Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

Safety Inspection Checklists

Initial adjustments should be made to suit the end user’s personal body structure, needs, and preferences. After initial setup, perform these procedures every time the product is serviced.

All Wheelchairs

CAUTION

As with any vehicle, the wheels and tires should be checked periodically for cracks and wear, and should be replaced.

Ensure that the wheelchair rolls straight (no excessive drag or pull to one side).

Ensure that the arms are secure but easy to release and adjustment levers engage properly.

Ensure that adjustable height arms operate and lock securely.

Ensure armrest pads sit flush against arm.

Ensure seat is secured to wheelchair frame.

Ensure seat release latch is functional. Replace if necessary.

Clean upholstery and armrests.

Ensure no excessive side movement or binding occurs when drive wheels are lifted and spun when disengaged (freewheeling).

Inspect caster assembly has proper tension when caster is spun. Caster should come to a gradual stop.

Loosen/tighten caster locknut if wheel wobbles noticeably or binds to a stop.

Ensure casters are free of debris.

Ensure all caster/wheel/fork/headtube fasteners are secure.

Inspect tires for flat spots and wear.

Ensure all fasteners on clothing guards are secure.

Seat and/or back upholstery have no rips and do not sag. Replace if necessary.

Inspect 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.

Ensure wheel mounting nuts are secure on drive wheels.

Check pneumatic tires for proper inflation.

Inspect motor brushes and gearbox coupling.

Part No. 1125075

19

Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

Ensure seat is secured to wheelchair frame.

Ensure seat release latch is not worn and is functional. Replace if necessary.

Ensure arm pivot points are not worn and/or loose. Replace if necessary.

Inspect for any loose hardware on the wheelchair.

Inspect charger AC power cord for damage. Replace if necessary.

Check that all labels are present and legible. Replace if necessary.

Inspect electrical components for signs of corrosion. Replace if corroded or damaged.

Additional Requirements for M61 Wheelchairs

Make sure elevate operates smoothly and properly.

Make sure elevate systems drive with reduced speed when seat is in elevated position.

Troubleshooting

NOTE: For additional troubleshooting information and explanation of error codes, refer to the individual electronics manual supplied with each wheelchair.

Wheels

WHEELCHAIRVEERS LEFT/RIGHT	SLUGGISHTURN/ PERFORMANCE	CASTERS FLUTTER	SQUEAKSAND RATTLES	LOOSENESS WHEELCHAIRIN	WHEELCHAIR3 WHEELS	SOLUTIONS
X	X	X				If pneumatic, check tires for correct and equal pressure.
X	X	X	X			Check for loose stem nuts/bolts.
X		X				Check that casters contact ground at the same time.

About 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.

Pronto® Series

20

Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SPJ+ Information Gauge Display Diagnostics

DISPLAY	DESCRIPTION	DEFINITION	COMMENTS
Information
Gauge
Display
	All LEDs are off.	Power is off.

				All LEDs are on.	Power is on.	Fewer than three LEDs on
						implies reduced battery
						charge.
				Left RED LED is flashing.	Battery charge is low.	The batteries should be
						charged as soon as possi-
						ble.
				Left to Right “chase” alter-	Joystick is in program-	The steady LEDs indicate
				nating with steady display.	ming, inhibit and/or charg-	the current state of the
					ing mode.	battery charge.
				All LEDs are flashing slowly.	Joystick has detected Out-	Release the joystick back
					of-Neutral-at-Power-Up	to Neutral.
					mode.

Part No. 1125075

21

Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SPJ Information Gauge Display Diagnostics

DISPLAY	DESCRIPTION	DEFINITION	COMMENTS
	All three LEDs are Off.	Power is Off.
INVACARE

All three LEDs are On.	Power is On.	Fewer than three LEDs
		On implies reduced
		battery charge.
INVACARE
RED LED is flashing.	Battery charge is low.	The batteries should be
		charged as soon as
		possible.
INVACARE
Left to Right “chase”	Joystick is in	The steady LEDs indicate
alternating with steady	programming, inhibit	the current state of the
display.	and/or charging mode.	battery charge.
INVACARE
GREEN LED is flashing.	Joystick is in Speed Limit	The current state of
	mode.	battery charge will be
		displayed at the same
INVACARE		time.

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	Joystick has detected a	Joystick uses Flash codes
quickly.	fault.	to indicate faults.

INVACARE

Pronto® Series

22

Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

Diagnostic Codes

NUMBER OF FLASHES	DIAGNOSTICS CODE	ERROR CODE DESCRIPTION	SUB CODE*	DETAILS OF ERROR CODE	POSSIBLE SOLUTION
1	E 01	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 charg-
					ing 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 Cur-
				rent Limit Events
			07	Current Offset Out of Range
			08	Hardware Current Limit Fault

Part No. 1125075

23

Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

NUMBER OF FLASHES	DIAGNOSTICS CODE	ERROR CODE DESCRIPTION	SUB CODE*	DETAILS OF ERROR CODE	POSSIBLE SOLUTION
5	E05	Left Park Brake	00	Left Park Brake Drive-Time	Check the left park brake connections and
		Fault		Test Failed	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	E06	Right Park Brake	00	Right Park Brake Drive-Time	Check the right park brake connections
		Fault		Test Failed	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,	Check the communications bus, connec-
				EEPROM, etc.)	tions and wiring. Replace the remote.
			01	Joystick fault at the remote
			02	Speed pot fault at the remote

Pronto® Series

24

Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

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	Communications	00	Remote connection lost	Check connections and wiring. Replace
		Fault			Bus cable.
			01	Low communication mode
10	E10	General Fault	00	General fault	Check all connections and wiring. Contact
					Invacare Technical Service.
11	E11	Incompati-	00	Incompatible/incorrect	Wrong type of remote connected. Ensure
		ble/incorrect		Remote	the branding of the joystick matches that
		Remote			of controller unit.
Motor/Gearbox/Brake

	SYMPTOM	PROBABLE CAUSE	SOLUTIONS
		Bad bearings.	If bearings are bad, replace motor. Refer to
			Removing/Installing the Motor on page 112.
	Motor makes a
		Raised commutator plate inside of	Ohm out motor and replace motor if high reading
	clicking noise.
		motor.	is present. Normal reading is .5-5 Ohms. Refer to
			Motor Testing on page 31 or Removing/Installing
			the Motor on page 112.
	Grinding noise or	Bad bearings. Bad Gears.	Replace motor/gearbox. Refer to
	motor is locking		Removing/Installing the Motor on page 112.
	up.
	Motors stall and	Current Rollback.	Stop driving and let electronics cool.
	starts up again.

Part No. 1125075

25

Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

	SYMPTOM	PROBABLE CAUSE	SOLUTIONS
		Damaged connector or worn	Ohm out motors. Check brushes and replace
		brushes.	brushes if necessary. Replace motor/gearbox if
		Bad motor or gear box.	high reading is present. Normal reading is 0-5
			Ohms. Refer to Motor Testing on page 31,
	Motor chatters or		Replacing Motor Brushes on page 116 or
	runs erratically, or		Removing/Installing the Motor on page 112.
	only one motor
		Motor release lever is disengaged.	Engage motor release levers. Refer to
	turns.
			Engaging/Disengaging Motor Release Lever on
			page 114.
		Controller malfunction.	Check for error codes with programmer. Refer to
			electronics manual.
	Wheelchair veers	Uneven tire pressure.	Inflate tires.
	to the left or right	Motors out of balance.	Replace tires if worn.
	when driving on		Use programmer to balance motors.
	level surface.
		Bad seal around drive shaft.	If seal is bad, replace motor/gearbox. Remove
			motor brushes and inspect for grease
			contamination. Replace motor/gearbox if
	Gearbox is leaking	Loose hardware.	contamination is found. Refer to Replacing Motor
	Fluid.		Brushes on page 116 or Removing/Installing the
			Motor on page 112.
			If loose hardware is found retighten hardware.
		Bad bearing in motor or gearbox.	Replace motor/gearbox. Refer to
	Excessive clicking		Removing/Installing the Motor on page 112.
	coming from
		Loose wheel hardware.	Tighten hardware, (use removable Loctite™on
	motor/gearbox.
			hardware). Follow torque settings in this manual.
	Rough driving.	Gearbox shaft movement or bent	Replace motor/gearbox. Refer to
		shaft.	Removing/Installing the Motor on page 112.
		Poor connection or worn brushes.	Check DCL connectors. Check brushes and
	Motor Stutters.		replace if necessary. Refer to Replacing Motor
			Brushes on page 116.
	Motor Fails to start	Battery voltage is too low.	Check batteries and recharge if necessary. Refer
		Bad Connection.	to Charging Batteries on page 104.
	after initial
		Brake Disengaged.	Check connector.
	installation.
			Engage brake.

Pronto® Series

26

Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

	SYMPTOM	PROBABLE CAUSE	SOLUTIONS
		Heavy load on the motors forcing	Leave power On and allow controller to count
		controller into the current rollback	down, and recharge the batteries overnight with
		mode.	power On.
		Blown fuse in battery wiring	Replace battery wiring harness. Refer to
		harness.	Connecting/Disconnecting Battery Cables on
			page 101.
	Motor is running	Damaged motor.	Replace brushes if necessary, or replace
			motor/gearbox if internal damage is determined.
	then fails to restart
			Refer to Replacing Motor Brushes on page 116 or
	when stopped.
			Removing/Installing the Motor on page 112.
			Ohm out motor to check for possible internal
			damage (worn out brushes may be possible).
			Refer to Motor Testing on page 31 or Replacing
			Motor Brushes on page 116.
		Controller power stage board or	Replace controller or send to Invacare for repair.
		relays may be damaged.	Refer to Replacing the Controller on page 125.
		Controller senses heavy load and	Stop driving and let electronics cool.
		has entered the current rollback
	Motor runs but	mode.
	loses power.
		Batteries are going bad.	Replace batteries. Refer to Removing/Installing
			Batteries from/into Battery Tray on page 99.
	Wheelchair loses	Bad Connection on wheelchair.	Turn power “Off”, wait 10 seconds and turn
			power back “On”.
	all power while
			Check joystick connection.
	driving.
			Check battery connection and fuses.

Battery

	SYMPTOM	PROBABLE CAUSE	SOLUTIONS
		Blown battery fuse or damaged cables.	Check cables for damage or replace battery wiring
	Batteries won’t		harness. Refer to Connecting/Disconnecting
		Batteries sat discharged too long.	Battery Cables on page 101.
	charge.
			Replace batteries. Refer to Removing/Installing
			Batteries from/into Battery Tray on page 99.
		One or both batteries may be bad (if	Check each battery and replace if needed. Refer to
	Short Charge Time	batteries charge up to soon).	Removing/Installing Batteries from/into Battery
			Tray on page 99.

Part No. 1125075

27

Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

	SYMPTOM	PROBABLE CAUSE	SOLUTIONS
		Bad connection or blown fuse. Check	Check all connections and housings for damage. If
		Joystick connection.	you have blown fuse a new battery wiring harness
			must be purchased. Refer to
		Batteries are dead.	Connecting/Disconnecting Battery Cables on
	No power to		page 101.
			Check battery voltage and replace if necessary.
	wheelchair motors.
			Refer to Removing/Installing Batteries from/into
			Battery Tray on page 99.
		Loose battery connections.	Check battery cable connections, may have
			vibrated loose when driving on rough terrain.
	Corroded battery	Possible water, salt, or urine	Replace battery wiring harness. Refer to
		damage.	Connecting/Disconnecting Battery Cables on
	wiring connections.
			page 101.

Battery Charger

	SYMPTOM	PROBABLE CAUSE	SOLUTIONS
		Charger not plugged into outlet, or	Make sure the charger is plugged into the outlet
		disconnected from wiring harness on	and check the wiring on the wheelchair.
		wheelchair.
		No AC power at outlet.	Check for AC power with digital volt meter.
	No LED’s on	Damaged power cord.	Check for damage on the power cord, replace if
			damaged or send to Invacare for repair.
	Charger
		Charger LED’s burnt out.	Send charger to Invacare for repair.
		Charger may have internal fuse that is	Remove charger cover and check for fuses. iI fuses
		blown.	are present, Ohm out fuses and replace if
			necessary. Refer to Replacing the On-Board
			Battery Charger Fuse on page 108.
		Blown battery fuse in wiring harness,	Check battery wiring harness fuse on the
		or charger.	wheelchair. Replace battery wiring harness if fuse is
			blown. Refer to Connecting/Disconnecting Battery
			Cables on page 101.
			Check fuse in the charger. Refer to Replacing the
			On-Board Battery Charger Fuse on page 108.
	Batteries won’t	Charger not plugged into outlet.	Make sure charger is plugged into the outlet.
		No AC power at the outlet.	Check for AC power with a digital volt meter.
	charge.
		Charger Power cord may be	Check for damage and replace if necessary, or
		damaged, or the connector may be	send in for repair.
		damaged.
		Charger may have internal damage.	Charge batteries with known good charger.
		Battery voltage too low for charger to	Replace batteries. Refer to Removing/Installing
		start charging cycle.	Batteries from/into Battery Tray on page 99.

Pronto® Series

28

Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

	SYMPTOM	PROBABLE CAUSE	SOLUTIONS
		Consumer not charging batteries long	Instruct consumer to charge for 8-10 hours
		enough.	minimum.
	Batteries have
		Batteries may be weak.	Perform load test or check “Battery Quality Menu”
	short driving range
			with the programmer. Refer to electronics manual.
	during a single
			Refer to Field Load Test on page 30.
	charge. Battery
		Check programming settings.	Torque setting and power level setting may be too
	Gauge falls off
			high. Refer to electronics manual.
	faster than normal.
		Heavy load on motors.	Chairs weight distribution may be offset
			(wheelchair may be front loaded).

M61 Only

SYMPTOM	PROBABLE CAUSE	SOLUTIONS
Wheelchair slows	Elevating seat is elevated.	Return seat to its lowest position. Refer to
or stops while		Elevating the Seat on page 37.
driving and the Seat
Function I indicator
is lit.
	Elevating seat sensor is damaged.	Examine elevating seat sensor. Replace if necessary.
		Refer to Removing/Installing the Actuator Switch
		Sensor on page 97.

Checking Battery Charge Level

The following “Do’s” and “Don’ts” are provided for your convenience and safety.

DO	DON’T
Read and understand this manual and any service	Don’t perform any installation or maintenance without
information that accompanies a battery and charger	first reading this manual.
before operating the wheelchair.
Move the wheelchair to a work area before opening	Don’t perform installation or maintenance of batteries
battery box or installing service batteries.	in an area that could be damaged by battery spills.
Recharge as frequently as possible to maintain a high	Don’t make it a habit to discharge batteries to the
charge level and extend battery life.	lowest level.
Follow recommendations in this manual when	Don’t use randomly chosen batteries or chargers.
selecting a battery or charger.
Fully charge new batteries before using.	Don’t put new batteries into servcie before charging.
Use a carrying strap to remove, move or install a	Don’t tip or tilt batteries.
battery.
Push battery clamps on the terminals. Spread clamps	Don’t tap on clamps and terminals with tools.
wider if necessary.
Use ONLY a GEL charger for a GEL battery or	Don’t mismatch your battery and chargers.
“Sealed” battery.

Part No. 1125075

29

Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

Field Load Test

NOTE: For this procedure, refer to FIGURE 3.1 on page 31.

Old batteries lose their ability to store and release power, due to increased internal resistance. This means that as you try to take power from the battery, some of that power is used up in the process of passing through the battery, resulting in less voltage at the posts. The more power drawn, the lower the voltage available. When this lost voltage drops the output 1.0 volts under load (2.0 for a pair), replace the batteries.

To spot this problem, test batteries under load.

Use a digital voltmeter to check battery charge level at the charger connector. The charger connector is located on the joystick.

NOTE: Read these instructions carefully and the manufacturer’s instructions on the digital voltmeter before using the digital voltmeter.

1.Ensure that power is Off.

2.Make sure battery is fully charged. An extremely discharged battery will exhibit the same symptoms as a bad one.

3.Remove the footrests from the wheelchair. Refer to Front Riggings/FootBoard on page 73.

4.Connect the voltmeter leads to the charger port on the wheelchair as shown in FIGURE 3.1. Most digital voltmeters are not affected by polarity, however, analog meters (meters with swinging needles) can be and should be used carefully. A good meter reading should be 25.5 to 26 VDC.

WARNING

When performing STEPS 5 and 6, ensure feet are clear from casters and wall, otherwise injury may result.

5.Sit in wheelchair and place feet against a wall, workbench or other stationary object.

6.Turn the power On and carefully push the joystick forward, trying to drive the wheelchair through the stationary object.

NOTE: Performing STEP 6 puts a heavy load on the batteries as they try to push through the stationary object. If the wheels spin, have two individuals (one on each arm) apply as much downward pressure as possible on the arms of the wheelchair.

7.Read the meter while the motors are straining, no longer than 3-4 seconds, to determine the voltage under load.

NOTE: If the voltage drops more than 2 volts from a pair of fully charged batteries while under load, they should be replaced regardless of the unloaded voltages.

Pronto® Series

30

Part No. 1125075