VEGA VEGASWING 61 - transistor (NPN-PNP) - Manual (Page 21)

21
7 Maintenance and fault rectification
VEGASWING 61 • - transistor (NPN/PNP)
29225-EN-130409
Error Cause Rectification
VEGASWING 61 signals
"covered" without being
submerged (overfill pro-
tection)
VEGASWING 61 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 el-
ement and the sensor if
there is buildup and re-
move it.
Wrong mode selected Set the correct mode on
the mode switch (over-
flow protection, dry
run protection). Wiring
should be carried out ac-
cording to the quiescent
current principle.
Signal lamp flashes red Error on the vibrating el-
ement
Check if the vibrating el-
ement is damaged or
extremely corroded.
Interference on the elec-
tronics module
Exchanging the electron-
ics 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 ap-
proval may be used.
Checking the switching
signal
Reaction after fault recti-
fication