9 Troubleshooting
Error Cause Remedial measures
No mains voltage available Check mains voltage
Main power circuit breaker has tripped Switch circuit breaker on again
Connection cable damaged Repair only by qualified electricians/service
partners
Float switch defective Contact Customer Services
Pump is not running
Overheating Submersible pump switches back on again
automatically when the temperature has
dropped again
Incorrect
level detected, level
error displayed
Float switch blocked Carry out maintenance (see "Level measure-
ment", page 91)
Multi-vane
impeller blocked
Soiling, solids have become lodged between
the multi-vane impeller and the spiral housing.
Clean pump (see "Pump", page 89)
Intake cage blocked Clean pump (see "Pump", page 89)
Spiral housing is worn Replace the spiral housing
Multi-vane impeller worn Replace multi-vane impeller
Reduced performance
Ventilation pipe blocked Clean ventilation opening
EN
016-102_01 DE_EN_FR Pumping station / Installation and operating manual 93 / 144
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