
Problem
Possible causes
Remedy
Unusual noises during opera-
tion
● Defective valves or dia-
phragms
● If necessary, clean or replace the
valves and diaphragms.
● Soiled suction chamber
● Clean suction chamber.
● The silencer is loose or
missing
● If necessary, check or replace
the silencer.
● Valves dirty or defective
● If necessary, clean or replace the
valves and diaphragms.
● Connection rod or mo-
tor bearing defective
● Contact
Tbl. 8:
Troubleshooting on diaphragm pumps
Malfunctions
36/46