9 Trouble-shooting
52 of 92
KSB Delta Macro
1983.843/04-EN
A B C D E
F G H
I Possible cause
Remedy
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Temperature of power
electronics or stator winding
too high
Reduce the ambient temperature.
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Improve ventilation.
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Clean cooling fins.
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Ensure that the intake opening for the fans is
not blocked.
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Ensure that the fans are working properly.
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Reduce the power input by changing the
operating point (system-specific).
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Check the permissible load and, if necessary, use
external cooling.
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24 V supply overloaded
Disconnect frequency inverter from the power
supply and eliminate the cause of the overload.
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Dry running
Check the hydraulic system and rectify the fault on
the frequency inverter.
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Sensor signal error (e.g.
broken wire)
Check sensor and sensor cable.
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Phase failure (drive)
Check motor connection and stator winding.
