Problem
E3 Pump performance has strongly
decreased
E4 Water flows over
E5 Too much air in the filter
E6 UV-C LED indicator does not
light up
E7 Filter suddenly became noisy
E8 Sudden and rapid algae growth
E9 Nitrite level suddenly rises
Possible cause
E3.6 Filter media clogged?
E3.7 Filter media arranged in wrong order?
E3.8 Filter media filled into too fine mesh bags?
E3.9 Air intake tubing clogged?
E3.10 Pump dirty?
E4.1 Filter head seal (1.31) forgotten?
E4.2 Filter head seal (1.31) damaged?
E4.3 More than 1.5 m (4.9 ft.) height difference between water surface and
filter head?
E5.1 Air entered the filter during maintenance?
E5.2 Intake strainer partially outside the water?
E5.3 Filter positioned too high?
E5.4 Are there air bubbles emerging from other devices such as an air
pump in the immediate vicinity of the intake tube?
E5.5 Are hoses, tubing or other connections leaky, e.g. due to seal rings
that fell out?
E5.6 Air intake hose and tube (4.2) clogged?
E6.1 Was the UV-C lamp switched off manually?
E6.2 Was the magnetic contact (1.18, 9.2) not reinstalled after replacing
the lamp?
E6.3 UV-C lamp faulty?
E6.4 Was the UV-C LED display cable accidentally torn off?
E7.1 Pressure side covered by sediments or dirt?
E7.2 Too much air in the filter?
E7.3 Running unit (3) not installed correctly, e.g. in a tilted position?
E7.4 Ceramic shaft broken?
E8.1 UV-C lamp switched off?
E8.2 UV-C lamp faulty or in use for too long?
E9.1 Filter media changed entirely recently?
Possible solution
Yes, open filter head (8.1 – 8.2), take the filter media baskets (1.34) out, and rinse
filter media with lukewarm water.
No, see item E3.7
Yes, please re-arrange according to "Operation Step 1: Filling with filter media".
No, see item E3.8
Yes, please place filter media directly in the filter media baskets (1.34). The filter
media recommended by sera are optimal for the filtration inside the UVC-Xtreme
filter and do not require additional filter media bags.
No, see item E3.9
Yes, remove air intake tube (4.2), clean it and push it back on again.
No, see item E3.10
Yes, clean pump chamber, impeller (3) and filter path inside the filter head.
No, please contact your retailer.
Yes, install correctly.
No, see item E4.2
Yes, replace seal.
No, see item E4.3
Yes, please place filter in a higher position (7.1), or reduce aquarium height.
No, please contact your retailer.
Yes, press "S" key (2) until pump works properly, repeat as required.
Should the suction pump not remove air entirely, see item E1 in the chart.
No, see item E5.2
Yes, attach intake strainer in a way that it is completely submerged in water.
No, see item E5.3
Yes, place filter in a lower position. The upper edge of the filter head should be at
least 20 cm (8 in.) underneath the water level (7.1).
No, see item E5.4
Yes, change position of airstone in a way that it is not located in the immediate
vicinity of the intake tube of the filter.
No, see item E5.5
Yes, re-establish proper connection, or replace parts affected by material fatigue.
No, see item E5.6
Yes, remove and clean air intake hose and tube.
No, please contact your retailer.
Yes, press "UVC" key (2) once until the UV-C LED indicator turns on.
No, see item E6.2
Yes, install.
No, see item E6.3
Yes, replace UV-C lamp.
No, see item E6.4
Yes, order the corresponding LED indicator unit from your retailer and replace it.
No, please contact your retailer.
Yes, please check outlet tube up to the actual outlet, disassemble affected parts and
clean them.
No, see item E7.2
Yes, see item E5 of the chart.
No, see item E7.3
Yes, please install correctly according to fig. 4.4 – 4.1.
No, see item E7.4
Yes, please replace complete running unit (3).
No, please contact your retailer.
Yes, press "UVC" key until the blue LED indicator turns on.
No, see item E8.2
Yes, replace the lamp.
No, please contact your retailer.
Yes,
– repeat partial water changes until nitrite values are alright again.
– use sera bio nitrivec.
– only replace filter material partially in the future.
No, check other care conditions that have possibly changed, and improve them.
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