VEGA VEGASWING 66 - two-wire With SIL qualification - Manual (Page 31)

31
7 Maintenance and fault rectification
VEGASWING 66 • - two-wire
44952-EN-130805
Error Cause Rectification
VEGASWING 66
signals "covered"
without being sub-
merged (overflow
protection)
VEGASWING 66
signals "uncov-
ered" when being
submerged (dry
run protection)
Operating voltage
too low
Check operating voltage
Electronics de-
fective
Press the mode switch on the signal
conditioning instrument. If the instru-
ment then changes the mode, the
vibrating element may be covered with
buildup or mechanically damaged.
Should the switching function in the
correct mode still be faulty, return the
instrument for repair.
Press the mode switch on the signal
conditioning instrument. If the instru-
ment then does not change the mode,
the electronics module is defective.
Exchange the electronics module.
Unfavourable in-
stallation location
Mount the instrument at a location in
the vessel where no dead zones or air
bubbles can form.
Buildup on the vi-
brating element
Check the vibrating element and
the sensor if there is buildup and re-
move it.
Wrong mode se-
lected
Set the correct mode on the signal
conditioning instrument (overflow pro-
tection, dry run protection). Wiring
should be carried out according to the
quiescent current principle.
Red control lamp
lights up
Error on the vi-
brating element
Check if the vibrating element is dam-
aged or extremely corroded.
Interference on
the electronics
module
Exchanging the electronics module
instrument de-
fective
Exchange the instrument or send it in
for repair
Depending on the reason for the fault and the measures taken, the
steps described in chapter "Set up" may have to be carried out again.
7.3 Exchanging the electronics
If the electronics module is defective, it can be replaced by the user.
With SIL qualified instrument, only a respective electronics module
with SIL qualification must be used.
In Ex applications only one instrument and one electronics module
with respective Ex approval may be used.
You find all information to the electronics exchange in the operating
instructions of the new electronics module.
7.4 Instrument repair
If a repair is necessary, please proceed as follows:
Checking the switching
signal
Reaction after fault recti-
fication