PRO-150 V1.0 11/18
Page 24
www.4qd.co.uk
05 Cannot pre-charge the main capacitors at power-up.
There is likely to be a short in the motor wiring to battery negative. If your battery
negative is connected to chassis, check for shorts in motor or wiring to chassis.
Switch off, disconnect the M+ and M- connections at the controller.
Switch on again. If the fault is cleared - the motor or its wiring is faulty.
Otherwise an internal controller fault.
06 Bridge pulldown_(PWM) failed (Power-up)
Likely to be an internal controller fault.
07 Bridge pull up (PWM) failed (Power-up)
Likely to be an internal controller fault.
08 Overheat
The thermal; sensor has detected over-temperature. This happens if the internal
heatsink block temperature rises above about 90°C.
Switch off and allow the Pro-150 to cool down!
09 Over voltage detected during operation
During regen braking, power is fed back to the battery: it is the batteries that do the
braking - not the Pro-150. This fault may occur if the battery voltage rises too high
during braking. Usually caused by a dud battery or a bad battery connection.
10 The parking brake is demanding excessive current (over 1 amp)
This fault will normally occur as the throttle is operated. The Pro-150 will not start
up. Remove the parking brake from the B connector and turn the ignition off and
then on. If the fault no longer occurs, there is a problem (usually a short circuit in
the wiring) with the parking brake.
11 Inhibit input (low)
The inhibit input has been operated or the + button has been pressed. See section
7 for details on the inhibit input.
12 Bridge unresponsive
The Pro-150 continuously checks that MOSFETs are working properly. If this fault
occurs it probably means it has detected an internal fault. Switch the Pro-150 off,
disconnect both motor wires and switch on. If the fault still occurs there is an
internal controller fault.
