98
PG DRIVES TECHNOLOGY
33
SP1B - D
IAGNOSTICS
SK73750/7
6 Other Trip Symptoms
This section covers trips which are not displayed on the status indicator by the controller.
This maybe because: either the controller cannot switch on; the trip is not considered
critical enough to “trip” the controller; or the controller cannot detect the trip. None
of these types of trips would present a hazard to the vehicle user.
6.1 System Will Not Switch On
With the on/off switch and keyswitch (if fitted) in the on position, check the voltage at
of the controller connections, P2- pin 5 (SOLO) and pin 1 (Egis).
For controller to operate, the voltage at the specified pin should be equal to battery
positive ± 0.25V. If this voltage is present and the vehicle will not switch on, then the
controller may be defective. Refer to section 7.
6.2 Vehicle Drives Slowly
If you think the controller has been programmed differently from the manufacturer’s
presets, check the programmed values. If these appear to be correct, then carry out
the following checks.
Firstly, check that the solenoid brake is not jammed. Refer to the vehicle manufacturer’s
instructions to see how to do this.
Secondly, check the voltage at the controller’s slow/fast input. On a correctly
functioning system the voltage should be as below. If the voltages are incorrect then
check the wiring and connectors to the slow/fast switch.
Slow/ Fast to Battery –ve: 0V ± 0.5V for slow mode
5V ± 0.5V for fast mode
If the voltages are correct and the trip is still present, then the controller may be
defective. Refer to section 7.
6.3 Status Indicator Does Not Light
If the vehicle appears to be operating correctly but the status indicator does not light,
then check the wiring and connectors from the controller’s status indicator output to
the status indicator itself.
On a correctly functioning system with a fully charged battery, the voltage on status
indicator output should be 12V ± 1V. If this voltage is not present even when there is
no connection to the controller, then the controller may be defective. Refer to section
7.
6.4 Reverse Alarm Does Not Sound
If the reverse alarm does not sound, firstly check the wiring and connectors from the
controller’s reverse alarm output and the sounder itself.
6.5 Vehicle Will Not Drive in Reverse
This section is only applicable to vehicles fitted with single-ended throttle configurations.
If the vehicle does not drive in reverse and the reverse switch is in the correct position,
then the voltage at reverse input should be checked. Depending on whether the
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