KSB PumpDrive 2 - Alerts and Warnings

11 Trouble-shooting
190 of 212
PumpDrive 2
A B C D E F G H I Possible cause Remedy
✘ - - - - - - - - Mains fuse rating too small for
frequency inverter input
current
Check design configuration of mains fuse.
- - - ✘ - - - - - No setpoint signal or setpoint
set too low / Drive is
overloaded and is operating in
i²t control mode
Check setpoint signal and operating point.
- - - - ✘ - - - - Process-related persistent
control deviation (actual value
smaller than setpoint) / Actual
value failure (e.g. due to
broken wire)
Check setpoint/actual value signal; check operating
point; check controller setting.
- ✘ -
-
- - - - - ✘ Permissible voltage range
undershot/exceeded
Check mains voltage; supply frequency inverter with
required voltage.
- - - - - - - ✘ - Wrong direction of rotation
set
Change the direction of rotation.
- - ✘ ✘ - - - - ✘ Frequency inverter overloaded Reduce the power input by lowering the speed;
check the motor/pump for blockages.
- ✘ - - - - - - ✘ Short circuit in control cable/
pump blocked
Check/replace control cable connections. Remove the
pump blockage manually.
- - ✘ ✘ - - - - ✘ Temperature of power
electronics or motor winding
too high
Reduce the ambient temperature by improving
ventilation.
Improve cooling by cleaning the cooling fins.
Ensure the intake opening for the motor fans is not
blocked.
Ensure that the motor 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 power supply overloaded Disconnect PumpDrive from the power supply and
eliminate the cause of the overload.
- - - - - - - - ✘ Dry running of pump Check the hydraulic system and rectify the fault on
PumpDrive.
- - - ✘ - ✘ - - ✘ Sensor signal error (e.g.
broken wire)
Check sensor and sensor cable.
- ✘ ✘ - - - - - ✘ Phase failure, drive side Check motor connection and motor winding.
11.2 Alerts
Table115: Alerts
Message
number
Message Description Behaviour
A1 Thermal motor protection PTC has tripped Self-acknowledging
(configurable)
A2 Overvoltage Impermissible overvoltage (mains) Partially self-
acknowledging
A3 Undervoltage Impermissible undervoltage (mains) Partially self-
acknowledging
A4 Phase failure (motor) Phase failure on motor side Non-self-
acknowledging
A5 Short circuit Motor short-circuited (defective motor winding) Partially self-
acknowledging
A6 Hardware error Hardware defective Non-self-
acknowledging
A7 Heat sink temperature high Power electronics overtemperature Non-self-
acknowledging