BA_373-E07_04_DEF_MJ_1821
35 | 36W. Baelz & Sohn GmbH & Co. · Koepstrasse 5 · 74076 Heilbronn · Germany · www.baelz.de Seite | Page
Motorized Linear Actuator baelz 373-E07
Malfunction Cause Action required
Actuator not working
Power failure Determine the cause and correct the
problem.
Defective fuse (in control cabinet) Determine the cause and correct the
problem, replace the fuse.
Linear actuator incorrectly connected Re-connectasspeciedoncircuit
diagram (inside cover).
Short circuit caused by humidity Determine the cause, dry the linear
actuator; if necessary, replace cover
sealandscrewsand/ortprotective
cover.
Short circuit caused by incorrect connection Connect correctly.
Motor winding damage caused, for example,
by high voltage or defective electronics
Determine cause, measure current
data, compare with nameplate and
specications,dismantlelinear
actuator and return for repair.
Voltage drop due to connecting cables being
toolongand/orhavinginsucientcross-
section
Measure current data with linear
actuator, recalculate connecting
cables and replace as necessary.
Actuator running erratically,
constantly opening and
closing
Poweructuationsexceedpermissible
tolerance
Improve power supply conditions.
Loose contact in supply line Check and tighten connections
(terminal blocks).
Actuator stops intermittently
Valve jamming Enable smooth valve movement.
Actuator does not move to
end position. Valve fails to
open / close
System pressure too high Adjust system pressure.
Poor input signal
- interfering signals
-signaluctuation
Check input signal at linear actuator,
correct the problem causing the
malfunction.
Linear actuator fails to move
or does not move correctly
tothepositiondenedby
the input signal.
Circuit board defective Replace circuit board, if necessary
dismantle actuator and return for
repair.
10.1 Checklist for operational malfunctions
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