PRO-150 V1.0 11/18
Page 3
www.4qd.co.uk
3. Safety
Passenger carrying vehicles must have some means of disconnecting the battery
in an emergency to guard against a failure in the controller or wiring which,
although very unlikely, could cause the motor to run at full speed.
The Pro-150 performs self-checks as it is switched on, and also does certain
checks during operation. These checks catch most faults but conditions of
operation, programming and use are outside our control and 4QD can accept no
liability for the results of any fault.
Suggestions for wiring etc are given in good faith and will suit most customers, but
4QD Ltd accept no liability for the design of your particular machine. It is up to the
machine manufacturer to make sure that the machine is safe under all fault
conditions, and meets all relevant regulations.
Circuit breaker and fuse
Faults in the battery or motor wiring can pose a fire risk, as well as introducing the
possibility of uncontrolled operation. You should make sure your batteries have
adequate circuit breakers and or fuses to disconnect them in the event of such
fault, or in the event of unforeseen circumstances where the power must be
disconnected.
Mechanical braking
All passenger carrying vehicles should also be fitted with a mechanical braking
system. Regenerative braking is not sufficient to provide a rapid stop in an
emergency.
Mounting
The Pro-150 must be mounted so that water and dirt cannot get to the circuit board.
If the metal base plate needs to be modified, first remove it from the controller to
prevent swarf contaminating the circuit board. Any damage caused by swarf is not
covered under the guarantee.
If water or other contamination does enter the Pro-150, disconnect the battery
immediately and clean or thoroughly dry out the controller before re-connecting the
battery.
The Pro-150 without its cover, and the display both have full battery voltage
present on them: take care that no metal object touches them while the battery is
connected.
Handling
The capacitors in the Pro-150 can retain charge for a long while after the battery is
disconnected so immediately after disconnecting the batteries turn on the ignition
for a few seconds to discharge them.
