VR2 CONTROL SYSTEM
SK77898/2
PG DRIVES TECHNOLOGY
112
considered critical enough to force a trip or the control system cannot detect the
condition.
2.4.1 Control system will not switch on
Check the battery connections to the control system. If these appear to be
good, then the Power Module may be defective, refer to section 5.
Check the cable between the Power Module and the Joystick Module. If this
appears to be good, then either module may be defective, refer to section 5.
2.4.2 Wheelchair drives slowly
This could be caused by one of the following.
The control system has been incorrectly programmed.
A speed limiting function is active, e.g. seat in a raised position on
wheelchairs fitted with lifting seats.
Defective motor or defective brake.
2.4.3 Wheelchair will not drive in a straight line
This could be caused by a defective motor or defective brake.
2.4.4 One motor or brake becomes very warm
This could be caused by a defective motor or defective brake.
2.4.5 Batteries discharge very quickly
The batteries can discharge very quickly for several reasons, these are described
below.
Worn or damaged batteries check battery condition.
Charger defective or incorrect charger being used check charger operation
(refer to wheelchairs operating manual).
Incorrect batteries being used refer to wheelchair manufacturers instructions
for correct battery types.
One motor or brake jamming.
The ambient temperature has a significant effect on battery
capacity. Therefore, if the temperature is lower than normal
the wheelchairs range will be reduced. In this situation, the
TruCharge battery gauge still gives an accurate state-of-
charge reading.
2.5 Trip Diagnosis
There are two methods of trip diagnosis.
2.5.1 Trip diagnosis with the TruCharge
The TruCharge Flash Codes are illustrated in Chapter 1 Section 8.6.
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