96
PG DRIVES TECHNOLOGY
31
SP1B - D
IAGNOSTICS
SK73750/7
Trip Code 0817: Short Circuit between Throttle Wiper and Throttle Low Reference
(Egis Pins 7 & 5)
Check the operation of the throttle potentiometer or voltage input mechanism, in
particular ensure it is returning to the rest position.
The following voltage measurements can be made for either a potentiometer input
throttle or voltage input throttle. Check that the throttle is in the rest position and any
speed limiting pots or buttons are set to maximum speed. The nominal voltage levels
should be as follows:
Wig-wag throttle: Hi Ref to BATT –ve: nominal 4.75V
Wiper to BATT –ve: nominal 2.5V
Lo Ref to BATT –ve: nominal 0.25V
Single-ended throttle: Hi Ref to BATT –ve: nominal 4.75V
*Wiper to BATT –ve: nominal 0.25V
Lo Ref to BATT –ve: nominal 0.25V
* If the 10 kΩ ISO Test resistor is used with single ended throttle, the nominal value at
Wiper is 0.188V
Trip code 1805 specifically relates to the Egis controller detecting electrically
conductive deposits around its throttle potentiometer connections.
If the throttle input is functioning correctly and the trip is still present, then the controller
may be defective. Refer to section 7.
5.8 Trip Type 8 - Possible Controller Trip
This occurs when the controller detects a trip within itself. The controller must be assumed
defective and repaired by an authorized person. Refer to section 7.0.
5.9 Trip Type 9 - Solenoid Brake Trip
This occurs when the controller detects a trip in the solenoid brake or the connections
to it. Check these connections and the solenoid brake. On a correctly functioning
system, the following voltage levels should be present.
Brake + to Brake-: 0V ± 0.5V, when the throttle is at rest.
Battery voltage ± 1V, when the throttle is away from
rest.
If the voltages are correct and the trip is still present, then the controller may be
defective. Refer to section 7.
The above voltage measurements should be carried out with
the vehicle’s drive wheels raised above the ground. Read the
vehicle manufacturer’s instructions regarding the jacking up
of the vehicle.
5.10 Trip Type 10 - High Battery Voltage
This occurs when the controller detects that the battery voltage has risen above 38V
for a 24V controller or above 42V for a 36V controller. The most common reasons for
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