Baelz Automatic BA 375-E42 - 10.1 Checklist for operational malfunctions

BA_375-E42_01_DEF_MJ_4419
31 | 32W. Baelz & Sohn GmbH & Co. · Koepffstrasse 5 · 74076 Heilbronn · Germany · www.baelz.de Seite | Page
Motorized Rotary Actuator baelz 375-E42
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.
Rotary actuator incorrectly connected Re-connectasspeciedoncircuit
diagram(insidecover).
Short circuit caused by humidity Determine the cause, dry the rotary
actuator; if necessary, replace cover
sealandscrewsand/ortprotective
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
specications,dismantlerotary
actuator and return for repair.
Voltage drop due to connecting cables being
toolongand/orhavinginsufcientcross-
section
Measure current data with rotary
actuator, recalculate connecting
cables and replace as necessary.
Actuator running erratically,
constantly opening and
closing
Poweructuationsexceedpermissible
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
-signaluctuation
Check input signal at rotary actuator,
correct the problem causing the
malfunction.
Rotary actuator fails to
move or does not move
correctly to the position
denedbytheinputsignal.
Circuit board defective Replace circuit board, if necessary
dismantle actuator and return for
repair.
10.1 Checklist for operational malfunctions