Pfeiffer Vacuum MVP 020-3 DC, Operating Instructions Manual

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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.
● Valves dirty or defec-
tive
● If necessary, clean or replace the
valves and diaphragms.
● Connection rod or mo-
tor bearing defective
● Contact Pfeiffer Vacuum Service .
Tbl. 8: Troubleshooting on diaphragm pumps
LED
Fig. 10: LED on the circuit board
LED flashing Meaning
1× Supply voltage < 16 V
2× Supply voltage > 36 V
3× Electronics excess temperature
4× Pump blocked, no rotation possible
5× Error speed monitoring
6× -
7× Electronics error
Tbl. 9: LED display of error codes
Malfunctions
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