EHEIM professionel4+ 250 Operating Instructions Manual page 19

Note: Only carry out steps 7 to 8 during every third to fourth general cleaning. By mixing used and new sub-
strate media, the required bacteria cultures remain intact.
Caution: Do not overfill filter inserts as, otherwise, their accurate fit is no longer assured.
7. Leave one-third of the used EHEIM SUBSTRAT pro and EHEIM bioMECH in the filter cartridge. 8. Re-fill two-
thirds of the used EHEIM SUBSTRAT pro and EHEIM bioMECH. 9. If required, completely renew EHEIM
MECH pro. 10. Re-insert all filters and filter inserts (chapter 3, step 8 - 10). 11. Clean the hose system using
an EHEIM universal cleaning brush (No. 4005570). 12. / 13. / 14. (chapter 3, step 8 - 10). 15. Attach the pump
head (17) (observe fitting position) and close the locking clips (8). 16. Put the filter system into operation (chap-
ter 3, step 17 - 23).
7. Cleaning the pump chamber
3
Caution: The caramic axis may break. Clean carefully!
1. Disassemble the safety adapter (13) and the pump head (17) (chapter 3, step 1 - 3). 2. Turn the pump
cover (23) and remove it. 3. Disassemble the pump wheel (22). 4. Clean the pump chamber, pump cover,
pump wheel and lubrication duct with the EHEIM cleaning set (No. 4009560). 5. The pump wheel (22) must
be clean and unobstructed (see arrows). Observe the installation position of the ceramic sleeve (a) (only
in professionel 4e
pump chamber with the pump cover (23) observing the cutout and studs (arrows). 8. Disassemble the bracket
(14) and the float (15) on the top side of the pump head (17) and clean them. 9. Install the check valve
(14/15) (observing the installation position; the float must be unobstructed). 10. Attach the pump head (17)
(observe fitting position) and close the locking clips (8). 11. Put the filter system into operation (chapter 3,
step 17 - 23).
8. What to do if . . .
. . . Top part of filter can't be closed
Cause
Filter inserts have been inserted wrongly.
Filter inserts are too full.
Gasket not fitted properly.
. . . Top of filter leaks
Cause
Closing clips not closed properly.
Sealing areas or gasket soiled.
Sealing ring not fitted,
inserted wrongly or damaged.
. . . Primer does not work
Cause
- 350 Type 2274). 6. Insert the pump wheel (22) into the pump chamber. 7. Close the
+
Solution
Push filter inserts and pre-filter in until they lie flush on top of each other.
Do not overfill filter inserts. If need be, clean the touching surfaces.
Insert correctly into the groove provided in the upper part of the filter.
Check for damage and if necessary replace.
Solution
Close all clips properly.
Clean seal areas and spray lightly with EHEIM silicone grease spray
(Order no. 4001000).
Insert sealing ring correctly or renew.
Solution
11