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
- - ✘ ✘ - - - - ✘ Temperature of power
electronics or stator winding
too high
Reduce the ambient temperature.
▪ Improve ventilation.
▪ Clean cooling fins.
▪ Ensure that the intake opening for the fans is
not blocked.
▪ Ensure that the fans are working properly.
▪ Reduce the power input by changing the
operating point (system-specific).
▪ Check the permissible load and, if necessary, use
external cooling.
- - - - - - ✘ - ✘ 24 V supply overloaded Disconnect frequency inverter from the power
supply and eliminate the cause of the overload.
- - - - - - - - ✘ Dry running Check the hydraulic system and rectify the fault on
the frequency inverter.
- - - ✘ - ✘ - - ✘ Sensor signal error (e.g.
broken wire)
Check sensor and sensor cable.
- ✘ ✘ - - - - - ✘ Phase failure (drive) Check motor connection and stator winding.