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Chapter 7 Troubleshooting
This section describes many common symptoms, with suggestions as to
what to do.
Display blank, transducer not firing.
Check power supply, voltage
selector switch and fuse.
Check wiring to transducer.
There is a fault with the
transducer wiring, so check
wiring to transducer.
Incorrect reading being displayed for
current level.
Measure actual distance from
transducer head to surface of
material. Enter Program Mode
and directly access P21 (Set
Distance) type in the
measured distance, ENTER,
ENTER again when
prompted, wait until SET
displayed and return to Run
Mode, display should now
update to correct reading.
Material level is consistently incorrect
by the same amount.
Check empty level, (P105)
display offset, (P802) and
measurement offset (P851).
LED’s change colour at relevant relay
switch points but relays do not change
state.
Check supply to unit and
ensure voltage selector set to
correct position.
External temperature sensor is
not detected. Check wiring or
change P852 (Temp Source).
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