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7 Maintenance and fault rectification
OPTISWITCH 5100 C, 5150 C • Contactless electronic switch
30428-EN-210701
Error
Cause
Rectification
OPTISWITCH 5100 C, 5150 C
signals "covered" without being sub-
merged (overfill protection)
OPTISWITCH 5100 C, 5150 C
signals "uncovered" when being
submerged (dry run protection)
Operating voltage too low
Check operating voltage
Electronics defective
Press the mode switch. If the instru-
ment then changes the mode, the
vibrating element may be covered
with buildup or mechanically dam-
aged. Should the switching function
in the correct mode still be faulty, re-
turn the instrument for repair.
Press the mode switch. If the in-
strument then does not change the
mode, the electronics module may
be defective. Exchange the electron-
ics 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 element and the
sensor for buildup and remove the
buildup if there is any.
Wrong mode selected
Set the correct mode with the mode
switch (overflow protection, dry run
protection). Wiring should be carried
out according to the closed-circuit
principle.
Signal lamp flashes red
Error on the vibrating element
Check if the vibrating element is
damaged or extremely corroded.
Interference on the electronics mod-
ule
Exchanging the electronics 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 "
Setup
" must be carried out again or must
be checked for plausibility and completeness.
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.
You can find all the information you need to carry out an electronics
exchange in the handbook of the new electronics module.
In general, all electronics modules of series SW60 can be inter-
changed. If you want to use an electronics module with a different
signal output, you carry out the complete setup. You find the neces-
sary, suitable operating instruction on our homepage.
Checking the switching
signal
Reaction after fault recti-
fication
