Problem
Possible causes
Remedy
Excessive heat gener-
ated during operation
● Lubricant soiled
● Change the lubricant
● Lubricant level is too low
● Top up lubricant.
● Ambient temperature is too
high
● Ensure that the permissible ambient
conditions are observed.
● Cooling liquid filling level is
too low
● Top up cooling liquid.
● Observe the requirements for the
cooling water.
● No cooling water feed, or
cooling water pressure too
low
● Check the cooling water feed and
flow rate. If necessary, increase the
cooling water pressure.
● Temperature of process
gases at gas inlet is too high
● Observe the temperature require-
ments for the gas inlet.
● Intake or exhaust line parti-
ally clogged
● Check the line cross sections.
● Clean filters or sieves as necessary
(where featured).
Vacuum pump not
reaching final pres-
sure
● Intake line plugged
● Intake lines are too long or
diameter is too short
● Clean the intake line
● Use a greater diameter or shorter
lines.
Increased current in-
put
● Counter-pressure too high
● Vacuum pump plugged with
process residue
● Cooling liquid or cooling wa-
ter lacking
● Contaminated or incorrect
lubricant
● Inspect and clean the exhaust line.
● Dismantle and clean the vacuum
pump.
● Check the cooling liquid and the
cooling water level.
● Change the lubricant.
Lubricant level too low
● Loss of oil to the outside or
inside
● Inspect the oil chambers for leaks
(covers, seals).
● Check the shaft seals.
Lubricant is black
● Lubricant level is too low
● Top up lubricant.
● The intervals for changing
the lubricant are too long
● Change the lubricant.
● High level of heat genera-
tion in the vacuum pump
during operation
● Rectify the cause of this heat gener-
ation.
Tbl. 14:
Troubleshooting
Malfunctions
56/70
