Pfeiffer Vacuum HEPTA 100 P Betriebsanleitung Seite 124

Malfunctions
Problem
Excessive heat gener-
ated during operation
Vacuum pump does
not reach ultimate
pressure
Increased current in-
put
Lubricant level too low
Lubricant is black
Tbl. 14:
124/138
Possible causes
● Lubricant soiled
● Lubricant level is too low
● Ambient temperature is too
high
● Cooling liquid filling level is
too low
● No cooling water feed, or
cooling water pressure too
low
● Temperature of process
gases at gas inlet is too high
● Intake or exhaust line parti-
ally plugged
● Vacuum line plugged
● Vacuum lines are too long
or diameter is too small
● Counter-pressure too high
● Vacuum pump plugged with
process residue
● Cooling liquid or cooling wa-
ter lacking
● Contaminated or incorrect
lubricant
● Loss of oil to the outside or
inside
● Lubricant level is too low
● The intervals for changing
the lubricant are too long
● High level of heat genera-
tion in the vacuum pump
during operation
Troubleshooting
Remedy
● Change the lubricant
● Top up lubricant.
● Ensure that the permissible ambient
conditions are observed.
● Top up cooling liquid.
● Observe the requirements for the
cooling water.
● Check the cooling water feed and
flow rate. If necessary, increase the
cooling water pressure.
● Observe the temperature require-
ments for the gas inlet.
● Check the line cross sections.
● Clean filters or sieves as necessary
(where featured).
● Clean the vacuum line
● Use a greater diameter or shorter
lines.
● Inspect and clean the exhaust line.
● Dismantle and clean the vacuum
pump.
● Check the cooling liquid and the
cooling water level.
● Change the lubricant.
● Inspect the oil chambers for leaks
(covers, seals).
● Check the shaft seals.
● Top up lubricant.
● Change the lubricant.
● Rectify the cause of this heat gener-
ation.