A B C D E F G H Possible cause
Remedy
The pump pressure must be released before
attempting to remedy faults on pressure-
retaining parts. Disconnect the pump from
the power supply!
X X
X Permissible voltage range undershot/
exceeded.
Check the mains voltage; supply the drive
with the specified voltage (via transformer, if
necessary).
X X
X Motor is overloaded.
Reduce the power input by lowering the
speed;
check the motor/pump for blockages.
X
X
X Short circuit on control cables.
Check/replace the control cable/connections.
X Pump blocked.
Remove the blockage manually.
X X
X Temperature of power electronics or motor
winding too high (particularly with high
torque and low speed).
Reduce the ambient temperature by
improving ventilation.
Improve cooling by cleaning the cooling fins.
Make sure the intake opening for the motor
fan is not blocked.
Make sure that the motor fan is working
properly.
Reduce the power input by changing the
operating point (system-specific).
Check the permissible load and, if necessary,
use external cooling.
X X 24 V supply overloaded.
Disconnect the voltage from the drive and
eliminate the cause of overload.
X Pump running dry.
Check the hydraulic system. Rectify the fault
on the drive.
X
X
X Sensor (signal) fault.
Check the sensor and sensor cable.
10 Trouble-shooting
48 of 56
Hya®-Solo DV
