Faults, causes and remedies
- Make sure that staff are trained to do the set tasks.
- Obey the installation and operating instructions.
- Make sure that the product is disconnected from the mains connection. Prevent the product from accidental switching on.
- Non-approved changes to the lifting unit release the manufacturer from any liability.
Overview of possible faults
Fault | Cause and solution |
Lifting unit does not pump | 1, 3, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16 |
Volume flow is too low | 1, 2, 3, 4, 5, 7, 8, 11, 12, 13 |
Current consumption is too high | 1, 2, 3, 4, 5, 7, 13 |
Delivery head is too small | 1, 2, 3, 4, 5, 8, 11, 12, 13 |
Lifting unit runs roughly/loud noise | 1, 2, 3, 9, 12, 13, 14 |
Possible causes and their solutions
- Inlet or impeller clogged
- Remove deposits from the inlet, tank and/or pump by the customer service.
- Incorrect direction of rotation
- Swap the two phases of the current feed by the customer service.
- Wear of inner parts (e.g. impeller, bearing)
- Replace worn parts by the customer service.
- Operating voltage too low
- A qualified electrician must examine the mains connection.
- Running on two phases
- Replace defective fuse by a qualified electrician.
- A qualified electrician must examine the mains connection.
- Motor start failure because of insufficient voltage
- A qualified electrician must examine the mains connection.
- Motor winding or electric cable defective
- Have the motor and electrical connection checked by the customer service.
- Non-return valve clogged
- Have the non-return valve cleaned by the customer service.
- Too low water level in the tank
- The customer must examine the level control device and replace it if necessary.
- Level control signal transmitter defective
- The customer service must examine the signal transmitter and replace it if necessary.
- Slide valve in the discharge pipe not open or not sufficiently open
- Fully open the slide valve.
- Not permitted quantity of air or gas in the fluid
- Consult the customer service.
- Radial bearing in the motor defective
- Consult the customer service.
- System-related vibrations
- Examine elastic connections of the piping, and inform the customer service if necessary.
- Winding temperature monitoring switched off because of too high winding temperature
- The motor switches back on automatically after the winding has cooled down.
- For frequent switch-off by the winding temperature monitoring, inform the customer service.
- Electronic motor protection triggered
- Rated current is higher than permitted, reset the motor protection using the reset button on the switchgear.
- For frequent switch-off by the electronic motor protection, inform the customer service.
Customer service
If the points listed here do not repair the fault, contact the customer service. Costs can be caused when using customer service support. Contact the customer service for more information.