Sunrise Medical 931157 service manual Five Bars Right Motor Wiring Trip, Test Right Motor Short

Understanding VSI Controller Diagnostics Codes (cont.)

3.5 Five Bars - Right Motor Wiring Trip

The right hand motor has a short circuit to a battery connection.

Test Right Motor Short

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. Take a resistance reading from pin 2 to pin 9 see (figure A3.5.1). Take a resistance reading from pin 2 to pin 7 or pin 8 see (figure A3.5.2), if the all the circuits are open (resistance is greater than 10K ohms), then replace the controller.

A3.5.1

A3.5.2

If the all the circuits are open (resistance is greater than 10K ohms), then replace the controller.

If the reading is short (resistance is less than 10 K ohms) on any of the readings, proceed to check the 4-pin motor connector. Measure the resistance from the bottom contact of the red thick wire on the 4-pin right motor connector to each of the top contacts of the connectors see (figure A3.5.3). Measure the resistance from the bottom contact of the black thick wire on the 4-pin right motor connector to each the top contacts of the connector (below right). If all of the readings are open, then replace the main harness. If any of the readings are short, then replace the right motor.

A3.5.3

Test 1 Test 2

Test 3 Test 4

If all of the readings are open, then replace the main harness. If any of the readings are short, then replace the right motor.

SUNRISE MEDICAL ASPIRE SERVICE MANUAL 2003 PAGE 8