TeeJet LH665 VRT - Manual (Page 49)

LH 665 VRT O PERATORS MANUAL A PPLICATION CONTROL , ENCODE & CALIBRATION
LH A GRO 4.15
Fault Cause Solution
The main cable to the LH
665 is not connected or
damaged Check that the main cable is
connected and not damaged.
An external unit, i.e. a DGPS
receiver is connected
incorrectly. Disconnect all external units
and switch the LH 665 on. If
the display on the LH 665
works then check the
connections to the external
unit.
Nothing is shown
on the display:
One of the LH 665 sensor
cables is damaged or
incorrectly connected. Disconnect all sensors one
by one until the display
works. The last wire to be
disconnected may be
damaged.
The DGPS receiver is not
sending any signals to the
LH 665. Some DGPS receivers can
take up to 15 minutes to
“lock” on to a signal when
they are started for the first
time.
Check that all connections
are good and that the cable
is not damaged.
Wrong cable between the LH
665 and the DGPS receiver. Both the LH 665 and the
DGPS receiver can be
damaged if the cable
between the LH 665 and the
DGPS receiver is incorrect.
No DGPS signal (D
or G not
displayed):
The DGPS receiver is
connected to the wrong
socket on the LH 665. The DGPS receiver must be
connected to “PORT 1” on
the LH 665.