Sunrise Medical 931157 Understanding VSI Controller Diagnostics Codes cont, Test Right Motor Open

Understanding VSI Controller Diagnostics Codes (cont.)

3.4 Four Bars- Right Motor Disconnected

The right hand motor has a bad connection. Check the connections to the right hand module.

Test Right Motor Open

Check that the batteries are fully charged and in good con- dition, and check all cables and connections. Check the connections to the right motor, look for a loose or damaged connector. Remove the 9-pin Beau plug and check the resistance across pin 1 and pin 2 as shown on (figure A3.4.1). If the meter reads between 0 to 1.5 ohms, then replace the controller.

A3.4.1

If the meter reads between 0 and 1.5 ohms, then replace the controller.

Otherwise, check the brushes on the right motor. Ensure that they are not excessively worn, (replace as required) as shown in (Figure A3.4.2).

A3.4.2

Use the meter to check the resistance across the two bot- tom contacts of the thicker wires on the 4-pin motor con- nector as shown in (figure A3.4.3). If the meter reads between 0 to 1.5 ohms, then replace the main harness. If none of the above corrects the problem, replace the right motor.

A3.4.3

If the meter reads between 0 and 1.5 ohms, then replace the main harness. If this does not correct the prob- lem, then replace the right motor.

SUNRISE MEDICAL ASPIRE SERVICE MANUAL 2003 PAGE 7