QM-7 SERIES SERVICE MANUAL
PAGE 3.8
JANUARY 2012 SUNRISE MEDICAL
Section 3
Nine Bars - Solenoid Brake Trip
Check that the batteries are fully charged, at the
correct voltage, and in good condition. Take a
voltage reading from pin 1 and pin 2 of the charger
port of the VR2 controller, see (figure 3.8.3) If the
meter reads more than 30 volts, then check the
charger. Otherwise, replace your controller.
Ten Bars - High Battery Voltage
An excessive voltage has been applied to the
control system. This is usually caused by a
poor battery connection. Check the battery
connections.
Fig .3.8.3
2
1
3
The parking brakes have a bad connection.
Make sure that the motor is in the locked/
engaged position. Check the parking break and
motor connections. Make sure the control system
connections are secure. Measure the two small
contacts on the four-pin motor connector (figure
3.8.1).
(figure 3.8.2) shows Motor in locked (Drive)
position, for Testing in Nine bar state.
Fig 3.8.1
Battery Fault
fig. 3.8.2
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