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Troubleshooting
Flow rate, pressure or vacuum too low
The vacuum system does not reach the performance stated in the techni-
cal data or data sheet.
Cause
There is overpressure
on the pressure side
and at the same time
vacuum or pressure
above atmospheric
pressure on the suction
side.
Pneumatic lines or con-
nection parts have in-
sufficient cross-sec-
tions or are constricted.
Leaks occur at pneu-
matic connections,
lines or pump head.
Pneumatic connections
or lines are completely
or partially clogged.
Head parts are soiled.
Rotary/push knob is
not set to max. speed.
74
Troubleshooting
à
Change the pneumatic conditions.
à
Disconnect the pump from the system to determine
the output values.
à
Eliminate any constriction (e.g. valve).
à
Use lines or connection parts with a larger cross-
section if necessary.
à
Ensure the correct seating of the hoses on the hose
connectors.
à
Ensure that the pneumatic connections are correctly
mounted.
à
Replace the leaky hoses.
à
Eliminate the leaks.
à
Check the pneumatic connections and lines.
à
Remove any parts or particles that are causing
blockages.
à
Clean the head components.
à
Set the rotary/push knob to max. speed.
Tab.32: Troubleshooting: Flow rate, pressure or vacuum too low
Translation of Originial Operating Instruction, KNF 325562-325564 02/23
Vacuum system SH820G / SR820G / SH840G / SR840G
