Fault Finding
Revision 04 (English), Date: 26.04.2016
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5
Fault Finding
In the following table you will find a list of possible faults. To every fault is a system de-
scription and in the third column a description of how to locate and/ or remove the fault.
Should you be unable to remove a fault, use the table to locate the problem as best as
possible before contacting us for advice.
Fault
Possible Causes
Diagnosis/Remedy
No system function
although guide wire
within field of view
1. Power supply voltage
to low
2. Guide wire broken
3. Wrong generator fre-
quency
1. check power supply at
necessary contacts
2. measure generator
current
3. check frequency set-
ting on generator hex
switch
Output levels not
reproducible
Inadequate accu-
racy level
1. Interference to the fre-
quency range 5 kHz
2. Two neighbouring
loops Working on the
same frequency
1. choose a new location,
away from possible
causes of interference
for the antenna
2. to avoid interference
from other loops set
neighbouring loops at
100 Hz difference
Crane drives with
an offset
1. Return leg of loop too
close (< 30 m)
2. Onesided collection of
large metal objects
either on or in the
ground or near the
antenna
1. guide wire layout as
shown in Figure 3 on
page 13
2. by an even offset
eventually adjust the
difference voltage via
poti RT 3
Table 7
Fault Finding
