5.4
Troubleshooting
Error
Cause
Remedial measures
No mains voltage available
Check the mains voltage
Mains power fuse has tripped
Switch fuse on again
Connection cable is damaged
Repair only by qualified electricians/service
partners
Float switch is defective
Contact customer services
Pump is not running
Overheating
Submersible pump switches back on again
automatically after the temperature has
dropped
Multi-vane
impeller is blocked
Dirt, solids have become lodged between the
multi-vane impeller and the spiral housing.
Clean the pump
Intake cage is blocked
Clean the pump
Spiral housing is worn
Replace spiral housing
Multi-vane impeller is worn
Replace the multi-vane impeller
Reduced pump-
ing capacity
Vent is blocked
Clean the vent
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