PRO-150 V1.0 11/18
Page 23
www.4qd.co.uk
PO (Pot Over)
Pot over-voltage has occurred. The pot maximum speed input voltage is set up in
parameters 12 and 13 and PO occurs if the voltage exceeds this level. Usually
caused by a broken earth wire to the pot. Will also be given if pot wiper is open-
circuit, or if fuse track F1 is blown (see section 12).
PU (Pot Under)
Pot under-voltage has occurred. The pot voltage has gone below the value set up
for full reverse speed [parameter 14].
Pd (Power down)
The display shows this when the ignition is on but the speed pot is at zero.
This is
not a fault condition.
Fault codes with numbers:
These are permanent faults that cause the Pro-150 to shut down and show a
number on the display. To reset these the ignition must be switched off then on
again.
01 Ignition_off (Power-up)
This occurs if the voltage on the ignition line falls below about 16v. Possible causes
include bad connections in the ignition switch circuit. Check that the b lead
is not connected to a motor terminal.
02 Battery voltage too low at switch on
This will be given if, at switch on, the battery voltage is too low (below about 15v).
Otherwise there is an internal controller fault.
Check that the b lead is not connected to a motor terminal.
03 Over voltage detected at switch on
This fault is reported if battery voltage at switch on is over 55 volts.
04 Cannot discharge main capacitors at switch on.
Check that the b lead is not connected to a motor terminal. Switch off,
disconnect the M+ and M- connections at the controller. Switch on again. If the fault
is cleared (or changes) - the motor or its wiring is faulty.
Otherwise an internal controller fault.
