Sterling Wheelchair AF-XXX Manuel D’Utilisation

Page de 55
Additive Feeders 
Chapter 7: Troubleshooting 
45 of 55 
AC line supplying power has 
too much noise. 
 
 
 
 
 
 
 
 
 
 
 
 
Review routing of power wires 
in machine to minimize 
electrical noise. Look for other 
devices which share the same 
circuit and may be producing 
unacceptable levels of line 
noise. In some applications, 
such as welding equipment, a 
careful regiment of applying an 
AC line filter, re-routing wires, 
dividing circuits, using shielded 
cable, and properly grounding 
devices will usually solve the 
problem. 
 
When power is applied, “LF-L” 
OR “LF-H” is displayed. 
AC line supplying power to unit 
has an abnormally high 
frequency. 
The unit is designed to operate 
with AC lines from 48-62 Hertz 
(cycles per second). This is 
typically not a problem because 
the international standards are 
50 and 60 Hertz. 
 
Other service problems or questions can be answered by contacting the Service 
Department.