Troubleshooting
56 | 72
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Troubleshooting
Explanation/Cause of error
Troubleshooting
Er 4
Maintenance interval has elapsed or
permissible number of backwash
processes per maintenance interval
has been exceeded
Contact the specialist installer
or Grünbeck's technical
service.
Er 5
Differential pressure sensor or its
connection line defective
Contact the specialist installer
or Grünbeck's technical
service.
Have the sensor and its
connection line replaced.
Er 6
Progressive wear and tear of thread
Contact the specialist installer
or Grünbeck's technical
service.
Have maintenance performed.
There is a threat of damage as
explained under Er 1 or Er 2.
