User's Manual

37 LS420 Universal User Manual V2.91 2003-01-21.doc
6.1 The Display Unit Does Not Light Up
Verify the connections of the black
wire, the red wire and, if appro-
priate, the white wire of the yellow
cable as described in section 2.1
of the Universal User Manual.
Yes
No
Yes
Verify the voltage on the black wire,
the red wire and, if appropriate
according to the specifications in
the user manual, the white wire of
the yellow cable.
No
Yes
No
Disconnect the
yellow cable from
the display unit
and reconnect it
carefully
No
No
Yes
Yes
Is there
a change in the
display?
Please call your service
representative
The display won't light up
Press "Test" button
Is there a bad
connection?
reconnect properly
Is there
a change in the
display?
Press "Test" button
to verify communica-
tion and battery sta-
tus of all sensors.
Is the
voltage on the wires
equal to that of the crane
battery?
Verify the crane battery. Verify the
crane fuse. Verify the crane
accessory switch if applicable.
Please call your service
representative
Press "Test" button
to verify communica-
tion and battery sta-
tus of all sensors.
Is there
a change in the
display?