26
7 Maintenance and fault rectification
VEGASWING 66 • - transistor (NPN/PNP)
43757-EN-130205
Error
Cause
Rectification
VEGASWING 66 signals
"covered" without being
submerged (overflow
protection)
VEGASWING 66 signals
"uncovered" when being
submerged (dry run pro-
tection)
Operating voltage too
low
Check operating voltage
Electronics defective
Press the mode switch.
If the instrument 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, re-
turn the instrument for
repair.
Press the mode switch. If
the instrument then does
not change the mode,
the electronics module
may be defective. Ex-
change the electronics
module.
Unfavourable installation
location
Mount the instrument at
a location in the vessel
where no dead zones or
air bubbles can form.
Buildup on the vibrating
element
Check the vibrating ele-
ment and the sensor if
there is buildup and re-
move it.
Wrong mode selected
Set the correct mo-
de on the mode switch
(overflow protection, dry
run protection). Wiring
should be carried out ac-
cording to the quiescent
current principle.
Red signal lamp lights up Error on the vibrating
element
Check if the vibrating
element is damaged or
extremely corroded.
Interference on the elect-
ronics module
Exchanging the electro-
nics module
instrument defective
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.
In Ex applications only an electronics module with respective Ex
approval may be used.
Checking the switching
signal
Reaction after fault recti-
fication
