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7 Controls System
7.1 Electrical
DANGER!
Risk of Death or Serious Injury
Electric shock can cause death or serious
injury.
-To avoid electric shock, inspect plug and cord
for cuts and/or frayed wires. Replace cut
cords or frayed wires immediately.
WARNING!
Power wheelchairs are equipped with three-
prong (grounding) plugs for protection against
possible shock hazards. Where a two-prong
wall receptacle is encountered, it is the
personal responsibility and obligation of the
customer to contact a qualified electrician and
have the two-prong replaced with a properly
grounded three-prong wall receptacle in
accordance with the National Electrical code. If
you must use an extension cord, use only a
three-wire extension cord having the same or
higher electrical rating as the device being
connected. DO NOT, under any circumstances,
cut or remove the round grounding prong
from any plug used with or for Invacare
products. In addition, Invacare has placed RED
warning tags on some equipment. DO NOT
remove these tags.
DANGER!
Risk of Death, Injury or Damage
Shock hazards and risk of fire exist due to use
of improper extension cord and/or use of
three prong adapters.
-To avoid injury or product damage, when
using an extension cord, use only a UL
approved three wire extension cord having at
least 16 AWG (American Wire Gauge) wire
and the same or higher electrical rating as the
device being connected.
-DO NOT use three prong to two prong
adapters.
7.2 Controls Protection System
The wheelchair controls system is equipped with an
overload protection.
60101831-I
If the drive is severely overloaded over a long period of
time (for example, when driving up a steep hill) and
especially when the ambient temperature is high, the
controls system could overheat. In this case, the
wheelchair performance is gradually reduced until it
stops. The status display shows a corresponding error
code (refer to the user manual for your remote). By
switching the power supply off and back on again, the
error code is cleared and the controls system is
switched back on. It can however take up to five
minutes until the controls system has cooled down
enough for the drive to restore full performance again.
If the drive is stalled by an insurmountable
obstacle, for example, a curb or similar which is
too high, and the driver attempts driving for more
than 20 seconds against this obstacle, the controls
system automatically switches off to prevent the
motors from being damaged. The status display
shows a corresponding error code (refer to your
remote user manual). By switching off and back
on again, the error code is cleared and the
controls system is switched back on.
A defective main fuse may be replaced
only after checking the entire controls
system. A specialized Invacare provider
must perform the replacement. You can
find information on the fuse type in
Chapter 13 Technical Data, page 55.
7.3 Batteries
Power is supplied by two 12 V batteries. The batteries
are maintenance-free and only need regular charging.
In the following, you find information on how
to charge, handle, transport, store, maintain, and
use batteries.
7.3.1 General Information on Charging
New batteries should always be fully charged once
before their first use. New batteries will be at their full
capacity after having run through approximately 10 -
20 charging cycles (break-in period). This break-in
period is necessary to fully activate the battery for
maximum performance and longevity. Thus, range and
running time of your mobility device could initially
increase with use.
Gel/AGM lead acid batteries do not have a memory
effect like NiCd batteries.
Invacare® TDX® SP2 Series
26
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