Drive U-drive IFU Benutzerhandbuch

U-Drive IFU Page 1 Issued 10/11

Contents

1. Introduction

2. Safety Procedures

3. Parts Description

4. Installation Instructions

5. Disassembly and Transportation

6. Battery Charging and Care

7. Operating the U-Drive

8. Inspection and Maintenance

9. Troubleshooting

10. Specification

11. Warranty

Introduction

The U-Drive system is designed to attach to

a user propelled wheelchair to turn it in to a

U-Drive. The U-Drive system can either be

removed or put in to neutral to allow the

user to propel the wheelchair manually.

The U-Drive system is designed to work in

conjunction with specific wheelchairs. The

list of wheelchairs your model will fit is

available from Drive Medical.

The U-Drive is controlled by the wheelchair

user independently.

The U-Drive uses a 24V 12ah battery pack,

which uses 2x 12V 12ah sealed lead acid

batteries (supplied).

The U-Drive is manufactured by Drive

Medical Ltd and is CE marked. Drive

Medical Ltd is an ISO 9001 and ISO 13485

certified Medical Device Manufacturer.

Safety Procedures

Ensure the U-Drive is installed as far to the

front of the wheelchair frame as is possible.

When connecting / disconnecting the

battery from the U-Drive or the charger

make sure both the power to the charger

and U-Drive joystick are switched off.

Ensure the U-Drive is secured in transit. It is

also recommended that the battery is

disconnected.

Ensure that the battery is charged only with

the battery charger supplied with the U-

Drive. Using another battery charger may

cause damage or injury.

Whilst the U-Drive has been EMC tested, it

may be susceptible to certain types of

electromagnetic waves. Avoid close

proximity to mobile phones, commercial

broadcast towers and emergency services’

radios. Other household appliances are not

known to pose any such risk. If involuntary

movement occurs, switch off the U-Drive

and report this to your dealer.

The U-Drive should not be used when it is

snowing or during heavy rain. This may

cause damage to the U-Drive. The U-Drive

should not be exposed to damp conditions

or direct sunlight.

Ensure the strap is hooked on to the left

hand wheelchair push handle and is taught

to prevent the U-Drive from dropping when

driving over pot holes, etc.

Before Driving

The user needs to be familiar with the use

and operation of this U-Drive before driving.

Ride on the pavement and pedestrian areas

only. Never ride on motorways or dual

carriageways. Only use roads to cross to

other side of the pavement.

U-Drive IFU Page 2 Issued 10/11

Be aware of traffic when crossing or using

roads.

Use extreme caution when driving your U-

Drive in busy areas such as shopping malls.

Do not drive the U-Drive under the influence

drink or drugs, or when you are tired.

Be careful when using the U-Drive in low

light. It has not been designed for use at

night.

Before using the U-Drive in busy or

hazardous environments, familiarise yourself

with the operation of the U-Drive. Practice

in an open and safe area which is free from

hazards and other people. Use a low speed

for your initial practice.

Always remain in the wheelchair seat

whilst using the U-Drive. Do not stand

on the footplate.

Whilst Driving

Do not use your U-Drive on surfaces that are

muddy, gravelly, bumpy, narrow, snowed

over, icy; or on towpaths near to canals

which are not guarded.

Do not use your U-Drive outside when it is

raining, snowing, misty or windy.

Do not make erratic turnings on your U-

Drive.

Bear in mind driving motions such as

accelerating, stopping, turning, reversing,

and the effect of gradients.

Slow down when driving on gradients.

Always lean forward when climbing a steep

gradient. Do not travel on gradients

exceeding those stated in the specification.

Most access ramps are 5º which is a suitable

incline for the U-Drive.

When climbing an incline, try to keep

your U-Drive moving. If you must stop,

start up again slowly, and then

accelerate cautiously. When driving

down an incline, do so slowly and in

the forward direction only. If your U-

Drive starts to move faster than you

anticipated or desired, allow the chair

to come to a complete stop by

releasing the joystick. Push the

joystick slightly forward and continue

travelling slowly down the incline.

When climbing an incline, do not

zigzag or drive at an angle up the face

of the incline. Always drive your

wheelchair straight up the incline.

This greatly reduces the possibility of

a tip or a fall.

Do not drive on roads with large drops or

potholes.

The U-Drive is not suitable for carrying

passengers.

Do not use the U-Drive to carry heavy goods.

Do not use a mobile phone or other wireless

communication devices whilst driving.

Always stop somewhere suitable and switch

off the U-Drive before using the phone.

Do not set in freewheel mode when driving,

especially on a gradient. Ensure that the U-

Drive’s automatic brakes are applied before

use.

Do not exceed the weight limit of the U-

Drive.

U-Drive IFU Page 3 Issued 10/11

Parts Description

2 1 3

1. Joystick Bracket (Includes 2 silver

clamps and 1 black joystick receiver)

2. Joystick Control

3. U-Drive Wheelchair Bracket

4. U-Drive Unit

5. Battery Pack

6. Measuring Bar

7. Charger (not shown)

Installation Instructions

Note: Installation should be completed by a

Drive Medical Specialist Dealer.

1. Joystick Installation

Using a hex key, undo the sections of the

clamp. Attach the two silver sections around

the armrest tubing, ensuring the section with

the tapped holes is inwards. (Photo 1).

Position the black joystick receiver against

the outside silver clamp. Turn until the

tubing of the receiver is horizontal. Reattach

the screws using the hex key. (Photo 2).

Loosen the knob on the side of the tubing

and slide the tubing attached to the joystick

inside the receiver tubing.

Position the joystick as required by the user

and secure by retightening the knob, as

shown in the photo 3.

Photo 1

Photo 2

Photo 3

U-Drive IFU Page 4 Issued 10/11

2. Bracket Installation

Install both brackets at the front of the

horizontal tube of the wheelchair frame,

ensuring the white nylon part is pointing

towards the rear of the chair (as shown by

the photo above).

When installing the brackets:

a. Ensure the white nylon section of the

brackets are inside the wheelchair frame

and point towards the rear of the frame

b. Ensure the brackets do not interfere with

the front castor wheels. Test this by

swivelling the castor forks and checking

all parts are clear of the brackets.

c. Ensure that the brackets are positioned

exactly opposite each other so the U-

Drive mounting bar is straight and easy to

push in to the bracket. If required, use

the measuring bar to check the brackets

are correctly positioned before securing

on the tubing.

3. U-Drive Unit Installation

Position the U-Drive unit behind the

wheelchair and ensure that the motors are

in the DRIVE position. Operate the lever

marked “Press or Pull” and push down the

yellow handle on the other lever to retract

the round pegs on the horizontal bar on the

front of the unit (as shown below).

Pull back the wheelchair and position so that

the mounting bar slides in to the brackets on

the wheelchair frame (as shown below).

U-Drive IFU Page 5 Issued 10/11

Operate the lever marked “Press or Pull” (as

shown below). The yellow handle will

automatically rise and the unit should now

be locked in position.

Plug the lead from the joystick in to the U-

Drive as shown below. If required, secure

the joystick cable to the wheelchair using

cable ties.

Loop the strap over the push handle and

adjust so that it is taught, as shown below.

(The strap is used to prevent the U-Drive

from dropping in to pot holes, etc)

4. Battery Pack Installation

To install, slot the battery pack in to the

receiver on the U-Drive and the pack will

automatically lock in to place.

Disassembly and Transportation

The disassembly procedure is essentially the

assembly procedure in reverse.

1. Remove the battery pack by lifting the

pack up by the handle whilst pressing the

grey button marked PRESS.

2. Unloop the strap from the push handle.

3. Pull out the joystick connector from the

U-Drive.

4. Operate the PUSH or PULL lever and

press the yellow handle down.

5. Push the wheelchair away from the U-

Drive.

The wheelchair can now be folded. The U-Drive

can be lifted using the handle at the front and

the chassis at the rear.

U-Drive IFU Page 6 Issued 10/11

Notes:

The battery supplied with the U-Drive is

classified as safe for air travel by

compliance with IATA special provision A67.

The battery pack has a handle to make it

easy to carry.

Battery Charging and Care

The U-Drive can either be charged through the

joystick (if the battery pack is installed) or the

battery pack (if this is removed).

Follow the procedure below to charge using the

joystick:

1. Switch the U-Drive off.

2. Plug the charger’s power cord into the

mains.

3. Plug the charger’s round connector in to the

socket located underneath the front of the

joystick unit.

4. Switch on the plug socket.

5. The charger’s LED will illuminate orange to

indicate the batteries are charging. The

charging duration is about 8 hours. To

ensure optimum performance a 12-hour

charge is recommended.

6. The orange LED will turn green when

charging is complete.

7. Turn off the charger, disconnect the power

cord and the round plug from the joystick

unit.

Follow the procedure below to charge using the

battery pack:

1. Switch the U-Drive off.

2. Remove the battery pack from the U-Drive

as described previously.

3. Plug the charger’s power cord into the

mains.

4. Plug the charger’s round connector in to

the socket located by the handle of the

battery pack.

5. Switch on the plug socket.

6. The charger’s LED will illuminate orange to

indicate the batteries are charging. The

charging duration is about 8 hours. To

ensure optimum performance a 12-hour

charge is recommended.

7. The orange LED will turn green when

charging is complete.

8. Turn off the charger, disconnect the power

cord and the round plug from the battery

pack.



Suggestion

1. Do not disconnect the charger

cord if charging is not completed.

The battery life will be seriously

shortened or decayed if the

battery is repeatedly used without

being fully charged. Therefore be

sure to charge the battery fully

every time.

2. Always complete the charging until

the LED light turns green. NEVER

stop charging before it is complete.

3. When fully charged, the battery

charger will still trickle charge the

battery to ensure optimum range.

4. If you do not use your powerpack

for a long time, it should be

charged at least every week to

keep the battery in a fully usable

condition.

5. The ambient temperature will

affect charging time. Charging time

will be longer in the winter.

6. After charging, do not leave the

charger socket plugged in to the

battery pack or joystick, as this will

cause a power drain on the battery

pack and temporarily reduce its

range.

7. The batteries carry a twelve-month

manufacturer's warranty. This

warranty only covers issues

relating to manufacturing faults,

and not faults relating to failure to

recharge the batteries as

instructed above.

U-Drive IFU Page 7 Issued 10/11



Attention: Please follow the rules below

to avoid accidents while charging.

1. Only use the supplied charger, and

recharge the battery to its full

capacity every time. You may

damage the battery if you use a

charger which is not to the correct

specification.

2. Never disassemble or modify the

charger.

3. Please charge in a well-ventilated

space where there is no direct

exposure to the sunlight. Do not

charge in surroundings where it is

humid, raining or dewy.

4. Do not charge in temperatures less

than -10°C or higher than +50°C as

the charger may not work well &

batteries may become damaged.



Warning

1. Keep away from flammable objects

while charging as this may lead to

fire or battery explosion.

2. Do not smoke while charging as the

battery may release hydrogen gas.

Always charge your battery in a

well-ventilated space.

3. Never connect or disconnect the

plug or cord with wet hands whilst

charging. Do not connect or

disconnect the plug or cord when

they are wet, it may lead to electric

shock.

Charger

The charger supplied has an LED which changes

colour depending on its status:

If the LED is lit ORANGE then the charger is

switched on and charging

If the LED is lit GREEN then the charger is

switched on and has finished the bulk of its

charging and the batteries can be used.

However, we recommend that you leave the

charger charging for a couple of hours after

the green LED has lit. This will maintain and

probably increase the capacity of your

batteries.

The LED will also illuminate GREEN if the

charger is switched on but not connected to

the batteries.

Batteries

Do not expose the battery pack to

temperatures below -10º or above 50ºC

when charging or storing.

The batteries are maintenance free and there

is no need to inspect the battery liquid or

refill with water.

You are required to charge the batteries on a

regular basis. Even if the powerpack is not

used, it should be charged at least once a

week.

The battery supplied with the U-Drive is

classified as safe for air travel by compliance

with IATA special provision A67.

Charging the Batteries

Using the charger supplied, the charging

duration is about 8 hours.

However, to ensure optimum performance

we recommend a 12-hour charge.

We also recommend that the batteries are

not charged for more than 24 hours.

U-Drive IFU Page 8 Issued 10/11

Operating the U-Drive

On / Off Button

Horn

Battery Gauge

Speed / Profile Indicator

Increase Speed / Profile

Decrease Speed / Profile

Charger and

Programmer socket

Control Panel

(see previous

diagram)

Joystick

Joystick Control Panel shown above

HOW TO OPERATE THE U-DRIVE

1. Joystick. The primary function of the joystick

is to control the speed and direction of the

wheelchair. The further you push the joystick

from the centre position the faster the

wheelchair will move. When you release the

joystick the brakes are automatically

applied.

2. On / Off button. The on/off button applies

power to the control system electronics,

which in turn supply power to the

wheelchair’s motors. Do not use the on/off

button to stop the wheelchair unless there is

an emergency. (If you do, you may shorten

the life of the wheelchair drive components).

The battery gauge shows you that the

wheelchair is switched on. It also indicates

the operating status of the wheelchair.

3. Increase Speed / Profile. Press this button to

increase the maximum speed of the

wheelchair.

4. Decrease Speed / Profile. Press this button

to decrease the maximum speed of the

wheelchair.

5. Speed / Profile Indicator. This shows the

maximum speed of the wheelchair. The more

LEDs are lit, the faster the maximum speed.

The wheelchair can be configured to use

drive profiles. However, this is not included

by default. For more information about drive

profiles, contact your dealer. If the speed

indicator ripples, this means the wheelchair

is locked.

To unlock / lock the wheelchair:

Switch the wheelchair on

Hold down the on/off button for 1 second

(lock only)

Deflect the joystick forwards until the control

system bleeps

Deflect the joystick backwards until the

control system bleeps

Release the joystick. There will be a long

bleep and the wheelchair will be unlocked /

locked.

6. Horn. Press this button to sound the horn.

The horn will stop when you release the

button.

7. Battery Gauge. This shows the battery

power level of the wheelchair.

The more LEDs that are lit, the more power

is left in the battery. The LEDs will be lit

constantly when the wheelchair is operating

normally.

U-Drive IFU Page 9 Issued 10/11

If the LEDs on the battery gauge are

stepping up (i.e. the number of LEDs lit

quickly increases then resets to 1), the

battery charger is connected and the

wheelchair drive inhibited.

If the battery gauge is flashing slowly then

the wheelchair is operating normally, but the

batteries need recharging as soon as

possible.

If the battery gauge LEDs are flashing

rapidly this indicates a fault with the

wheelchair. If you have a problem with your

wheelchair consult the table below. If the

problem persists after you have followed the

advice herein then restarted the wheelchair,

contact your dealer.

1 Bar

The battery needs

charging or there is a

bad connection to the

battery. Check the

connections to the

battery. If the

connections are good, try

charging the battery.

2 Bar

The left hand motor has

a bad connection. Check

the connections to the

left hand motor.

3 Bar

The left hand motor has

a short circuit to a

battery connection.

Contact your service

agent.

4 Bar

The right hand motor has

a bad connection. Check

the connections to the

right hand motor.

5 Bar

The right hand motor has

a short circuit to a

battery connection.

Contact your service

agent.

6 Bar

The wheelchair is being

prevented from driving

by an external signal. The

exact cause will depend

on the type of wheelchair

you have, one possibility

is the battery charger is

connected.

7 Bar

A joystick fault is

indicated. Make sure that

the joystick is in the

centre position before

switching on the control

system.

8 Bar

A control system fault is

indicated. Make sure that

all connections are

secure.

9 Bar

The parking brakes have

a bad connection. Check

the parking brake and

motor connections. Make

sure the control system

connections are secure.

10 Bar

An excessive voltage has

been applied to the

control system.

This is usually caused by

a poor battery

connection. Check the

battery connections.

10 Bar +

Speed

This is where the Speed

Indicator and 10 bars are

lit.

A communication fault is

indicated. Make sure that

joystick cable is securely

connected and not

damaged.

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