94
PG DRIVES TECHNOLOGY
29
SP1B - D
IAGNOSTICS
SK73750/7
5 Trip Types and Their Possible Causes
Once the trip type has been established, refer to the relevant section below for further
information.
5.1 Trip Type 1 - Low Battery Voltage
This occurs when the controller detects that the battery voltage has fallen below 16V.
Check the condition of the batteries.
If the trip is still present after the batteries and connections have been checked, then
the controller may be defective. Refer to section 7.
5.2 Trip Type 2 - Motor Disconnected
This occurs when the controller detects that the motor has become disconnected.
Check the motor connectors and wiring.
Some vehicles may disconnect the motor from the controller whilst in freewheel mode.
If so, check the position of the parking brake disengage lever.
If the trip is still present after the above checks have been made, then the controller
may be defective. Refer to section 7.
5.3 Trip Type 3 - Motor Wiring Trip
This occurs when the controller detects a trip in the wiring to the motor, in particular if
a motor connection has “short-circuited” to a battery connection. Check the motor
connectors and wiring.
If the trip is still present after the above checks have been made, then the controller
may be defective. Refer to section 7.
5.4 Trip Type 4 - Parking Brake Off
This occurs if the freewheel switch is operated whilst the vehicle is driving, or if the
freewheel switch is already operated when the vehicle is switched on. Check the
position of the freewheel switch.
If the freewheel switch is in the correct position, then the voltage at controller’s input
pin should be checked. On a correctly functioning system the voltage should be as
below. If the voltages are incorrect then check the wiring to the freewheel switch.
Freewheel to Battery -ve : 0V ± 0.5V to freewheel
5V ± 0.5V to drive
If the voltages are correct and the trip is still present, then the controller may be
defective. Refer to section 7.
5.5 Trip Type 5 - Not Used
Not used.
5.6 Trip Type 6 - Inhibit Active
This occurs when the controller detects that the input is activated. The most common
use for the inhibit input is for disabling the vehicle’s drive when the battery charger is
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