TAVRIDA ELECTRIC ISM_LD Series, Application Manual

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6
Error
group
Malfunction
LED blinks
Function, type
of malfunction
Description of malfunction
variants
Recommendation
for malfunction
elimination
Affected
CM
External
error
3 blink signals,
then 1.5 s
pause, periodic The magnetic actu-
ator coil circuit is
interrupted. Malfunction variant 1:
Possible
causes: cable break, loose terminal
connections, defect magnetic
actuator coils.
- Check for cable
break
- Check terminal
connections All CM
CM-internal
malfunction. Malfunction variant 2:
CM-defect.
- CM must be
replaced
4 blink signals,
then 1.5 s
pause, periodic The magnetic
actuator coil circuit
is short circuited. Possible causes: Short circuited
cable strands, short circuited terminal
connections. - Check for short
circuit in the
cable
- Check for short
circuited terminals All CM
5 blink signals,
then 1.5 s
pause, periodic without CM
command, the ISM
trips. Malfunction variant 1:
Mechanical emergency trip.
Delete the
malfunction
indication with the
CM Trip command. All CM
ISM is closed, a trip
is simulated. Malfunction variant 2: The ISM was
properly closed by the CM and the
close position feedback exists. Then
a malfunction occurres in the ISM
auxiliary switch S13 circuit in which
the normally open switch S13 is
bridged (the ISM can still be tripped
again via the CM despite the existing
malfunction. This deletes the
malfunction indication but the cause
of the indication is still there).
- Check for short
circuit in the
cable
- Check for short
circuited terminals
- Check ISM position
switch S13
Internal
error
17 or more
blink signals,
then 1.5 s
pause, periodic Various internal
malfunction of the
CM. - CM must be
replaced All CM
Explanatory notes to malfunction indications and operational readiness
· If the ISM is in OFF position and malfunction indications exist, ISM can be closed only after all malfunctions have
been eliminated.
· If several malfunctions appear at the same time malfunctions regarding the magnetic actuator are indicated with
priority otherwise the last malfunction that occurred.
· Usually failures need to be fixed to stop malfunction indication.
During several malfunction variants of 2- or 5- blink failures, the malfunction indication will disappear with a trip
CM command.
· In case of internal CM failures please contact your nearest Tavrida Electric partner.
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