Quantum VSI, Basic Operation Instructions

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15
Thermal Rollback
The VSI controller is equipped with a thermal rollback circuit. This circuit monitors the temperature of the
controller, which roughly translates to motor temperature. In the event that the VSI controller becomes
excessively hot, motor current (amperage) is reduced. For every degree above normal temperature, the
motor current limit is reduced proportionally. This reduces “power,” which could also reduce power chair
speed. Once the VSI controller reaches its temperature limit, the current output is reduced to zero and
your power chair will stop. This allows the electrical components and motors to cool down. When the
temperature returns to a safe level, your power chair resumes its normal operation.
Fault Codes
The VSI controller is designed with the user’s safety as the prime consideration. It incorporates many
sophisticated self-test features which search for potential problems at a rate of 100 times per second.
If the VSI detects a problem either in its own circuits or in the power chair’s electrical system, it may
decide to stop the power chair, depending on the severity of the problem. The VSI is designed to
maximize the user’s safety under all normal conditions. The table below identifies the individual fault
codes. Fault codes are displayed as a rapid flashing of the lights. If you encounter one of these fault
codes or experience any other problems with your power chair, contact a Pride/Quantum Provider.
Flashing Lights Diagnosis and Solution
1 The batteries need charging or there is a bad connection to the batteries.
Check the connections to the batteries. If the connections are good, try
charging the batteries.
2 The left motor has a bad connection. Check the left motor connection.
3 The left motor has a short circuit to another connection. Contact your Pride/
Quantum Provider.
4 The right motor has a bad connection. Check right motor connection.
5 The right motor has a short circuit to another connection. Contact your Pride/
Quantum Provider.
Ripple side to side
of lights
The power chair is being inhibited by the off-board battery charger.
7 A joystick fault is indicated. Make sure that the joystick is in the (center)
position before turning on the controller.
8 A controller system fault is indicated. Make sure that all connections are
secure and the batteries are fully charged.
9 The parking brakes have a bad connection. Check the parking brake motor
connections. Make sure the controller connections are secure.
10 An excessive voltage has been applied to the controller. This is usually caused
by a poor battery connection. Check the battery connections.