Invacare 1125078 service manual Electro-Mechanical Parking Brake Test

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

Electro-Mechanical Parking Brake Test

NOTE: For this procedure, refer to FIGURE 3.2.

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.

3.Measure the resistance between the two brake contacts. A normal reading is between 45-100 ohms depending on the motor. A reading of 0 ohms or a very high reading; i.e., MEG ohms or O.L. (out of limit) indicates a shorted brake or an open connection respectively. If either condition exists, send the motor to Invacare Technical Service for inspection/repair.

WARNING

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

Proper controller operation regarding brake function should be performed when- ever a shorted brake is found and replaced.

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

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4 Pin Motor

Connector

Digital

Multimeter

Motor

Cap

FIGURE 3.2 Electro-Mechanical Parking Brake Test

Part No. 1125078 29 At’m and At’m QT