KRAL CKC, Руководство по эксплуатации

Страница: 34 / 40

14 Troubleshooting
14.2 Troubleshooting
Fault identification Cause Remedy
– 2 – 4 – – – Speed/frequency/voltage of the motor false
1. Ensure that the motor frequency and voltage match the operating voltage.
2. Ensure that the speed of the motor matches the rating plate of the pump. If necessary ad-
just the speed.
– 2 – – 5 – – Overflow valve leaks
Contact the manufacturer.
– 2 – – – – – Advanced wear of the housing/screw set
Contact the manufacturer.
– – – – – – 7 Advanced wear of sealing surfaces
Replace the seal and check the pumped liquid for abrasive substances. If required, re-
place the filter/strainer.
-or-
Contact the manufacturer.
– – 3 – – – – Coupling aligned incorrectly
Assemble the coupling and motor correctly Ä Connection, Page 18
– – 3 – – – – Pump subject to mechanical stress
Connect the pump correctly to the pipe system
Ä
Connection, Page 18.
– – 3 – – – – Vibrations/pulsations in the system
Bear the pump unit elastically.
-or-
Make the connections with hoses.
– – 3 – – – – Flow speed in the pressure line or suction line too high
Set the flow speed in the pressure line so that it does not exceed 3 m/s.
-or-
Set the flow speed in the suction line so that it does not exceed 1 m/s.
-or-
Contact the manufacturer.
– – 3 4 – – 7 Ball bearing damaged
Replace the ball bearing
Ä
Servicing, Page 27.
– 2 3 4 – – 7 Superficial damage to pump parts coming into contact with the liquid
Contact the manufacturer.
– – – – – – 7 Shaft seal damaged through dry running
Replace the shaft seal Ä Servicing, Page 27.
– – – – – – 7 Inlet pressure too high
1. Reduce the inlet pressure at the system side.
2. Replace the shaft seal
Ä
Servicing, Page 27.
– – – – – – 7 Inlet pressure too low
Install a non-return valve at the pressure side.
– – – – – – 7 Shaft seal is overloaded through thermal/chemical influences
1. Check the maximum operating temperature.
2. Check the suitability and resistance of the elastomers with regard to the pumped liquid.
-or-
Contact the manufacturer.
– – – – – – 7 Overload of the shaft seal by pressure build-up during the heating process
Open the pressure-side/suction-side shut-off device in order to avoid a pressure build-up
through heat expansion of the pumped liquid.
1 2 3 4 5 – – Cold start when delivering high-viscosity liquids
Install the heating system.
– – – 4 – – 7 Foreign bodies in the pump
Contact the manufacturer.
34 OIC 01en-GB Edition 2019-11 Operating instructions