MELODY SERVICE MANUAL
PAGE 9
2006
SUNRISE MEDICAL
Section 3
Understanding Controller Diagnostics Codes (cont.)
Check that the batteries are fully charged and in good
condition; and check all cables and connections. Check the
connections to the right motor, look for a loose or damaged
connector.
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 controller. If any
of the readings are short, then replace the right motor.
3.5 Five Bars - Right Motor Wiring Trip
A3.5.3
Test 1
Test 2
Test 3
Test 4
If all of the readings are open, then replace the controller.
If any of the readings are short, then replace the right motor.
A joystick trip is indicated. Make sure that the joystick is in the center position before switching on the control system.
Check that the batteries are fully charged and in good condition, examine the joystick for damage. This fault can be
caused by a joystick that fails to center itself due to being dirty, bent or broken. If this is the case, replace the joystick mod-
ule.
3.7 Seven Bars - Possible Joystick Trip
The Onboard Batteries are being charged with the off-board charger. You will not be able to drive the wheelchair until the
charger is disconnected. You will have to reset the control system by switching off the power and the Powering up again.
The On-Board charger has no indication that the chair is charging, and the chair will not move until complete.
If the condition still exists after the charger has been disconnected and the chair has been switched off and powered up
again, the Joy stick module may be defective.
3.6 Six Bars - Charger Connected
If the joystick fails to center because it is bent or broken, replace the joystick module.
Controller Fault - A control system trip is indicated. Make sure that all connections are secure. Check that the batteries
are fully charged and in good condition, and check all joystick connections and cables. If this does not correct the prob-
lem, then replace the controller.
3.8 Eight Bars - Possible Control System Trip
