TROUBLESHOOTING

PROCEDURE 2

Ohmmeter

Motor Connector

FIGURE 3 - MOTOR TESTING

MOTOR BRUSH INSPECTION (FIGURE 4)

NOTE:Thisprocedureshouldonlybeperformedonwheel- chairs with conventional motor/gearbox assembly.

There are two (2) contact brushes on ACTION STORM mo- tors located under the brush caps on the motor housing. If thesecapsarehardtoremovetheyareeitherovertightenedor the motor has become very hot. Let motors cool. If caps still cannotberemoved,itisrecommendedthatthemotorbesent toInvacareTechnicalServicesforinspection/repair.

NOTE: It is very important to note which way the brush comes out of the motor. The brush MUST be placed into the motor exactly the same way to ensure good contact with the commutator.

1.Once the motor brush caps have been removed, pull the brushes out of the motor. The end of the brushes should be smooth and shiny and the spring should not be damaged or discolored. If one or both of the brushes are damaged, only the damaged or worn brushes need be replaced. It is very important that any time a brush is replaced, it must be “burned in”. This is accomplished by running the motor for one hour in each direction with a half hour break in-be- tween. This should also be done with little or no load on the motor, i.e., put the wheelchair up on blocks so the drive (large) wheels do not contact the ground and run the wheelchair. A motor with only one brush replaced will only carry a small percentage of its rated load capacity until the NEW brush is burned in.

Cap

Motor

4 Pin Motor Connector

FIGURE 4 - MOTOR BRUSH INSPECTION

ELECTRO-MECHANICAL PARKING BRAKE TESTING (FIGURE 5)

NOTE: This procedure should only be performed on wheelchairs with conventional motor/gearbox assembly.

1.On the four-pin motor connector, locate the side by side connectors in the black housings.

2.Set the digital multimeter to read ohms (Ω).

3.Measure the resistance between the two (2) brake con- tacts. A normal reading is 100 ohms (Ω). A reading of 0 ohms (Ω) or a very high reading; i.e., MEG ohms or O.L. (outoflimit)indicatesashortedbrakeoranopenconnec- tion respectively. If either condition exists, send the motor toInvacareTechnicalServiceforinspection/repair.

CAUTION

A shorted electro-mechanical brake will damage the brake output section in the con- troller. DO NOT connect a shorted electro- mechanical brake to a good controller mod- ule. A shorted brake MUST be replaced.

NOTE: A bad motor can damage the controller module but a bad controller will NOT damage a motor.

Cap Motor

4 Pin Motor Connector

Ohmmeter

FIGURE 5 - ELECTRO-MECHANICAL

PARKING BRAKE TESTING

T R O U B L E S H O O T I N G

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Invacare Arrow FWD, MWD, RWD service manual Motor Brush Inspection Figure, ELECTRO-MECHANICAL Parking Brake Testing Figure
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Arrow FWD, RWD, MWD specifications

Invacare is a renowned name in the field of mobility technologies, consistently innovating and enhancing the mobility devices market. Among its outstanding offerings are the Invacare MWD (Mid Wheel Drive), RWD (Rear Wheel Drive), and Arrow FWD (Front Wheel Drive) wheelchairs. Each of these models serves unique user needs, featuring distinct designs and functionalities.

The Invacare MWD is engineered for exceptional maneuverability. Its mid-wheel drive technology provides a centralized drive wheel, allowing for tight turns and easy navigation in confined spaces. This makes the MWD particularly suitable for indoor use, where space can be limited. The MWD also features advanced suspension systems, offering superior shock absorption. This results in a smoother ride over various terrains, enhancing user comfort and stability.

On the other hand, the Invacare RWD focuses on robust outdoor performance. With its rear-wheel drive configuration, this model has excellent traction and provides powerful acceleration. The RWD is designed for versatility, equipped with larger wheels that can handle uneven terrain while providing a stable ride. Its durable construction ensures enhanced longevity, making it an ideal choice for users who lead an active lifestyle and require reliable mobility solutions on rugged ground.

The Arrow FWD wheelchair brings another dimension with its front-wheel drive system. This design allows users to easily navigate obstacles as the front wheels can pivot over them. The Arrow FWD is particularly suited for both indoor and outdoor use, as it combines the agility of the MWD with the stability seen in the RWD. It features a compact design, making it easier for users to position themselves in various settings and social situations.

All three models utilize Invacare's cutting-edge technologies, such as advanced control systems and customizable seating options, enabling users to find their optimal comfort and support levels. The customizable features also cater to individual user needs, promoting enhanced independence.

In summary, Invacare’s MWD, RWD, and Arrow FWD wheelchairs represent an impressive blend of functionality, durability, and user-centric design. Each model presents its own unique technologies and attributes, allowing users to make informed choices based on their specific mobility requirements, lifestyle, and preferences. Whether navigating tight indoor spaces or tackling outdoor challenges, Invacare’s range of wheelchairs ensures that users can experience mobility with confidence and ease.
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