Troubleshooting | 11
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Loss of capacity. Leak in the system. • Find the leaks and stop
them.
Activated safety valve. • Check differential pres-
sure and see causes
marked with *.
Possibly set the safety
valve’s opening pressure.
Dirty inlet filter or blocked
pipes.
• Clean and possibly re-
place filters and pipes.
Loose V-belts. • Replace V-belts.
Too high differential pres-
sure*.
• See symptoms and causes
marked with *.
Continuously activated
safety valve.
Too high rpm and thereby
too high amount of air (con-
cerns frequency-controlled
blowers).
• Lower the rpm.
Too high differential pres-
sure*
• Find the cause of the in-
creased differential pres-
sure and repair it.
The valve setting is below
the actual operating point.
• Adjust the max limits of
fthe valve within the
blower. Monitor the ab-
sorbed power and ensure
that the setting does not
allow overloading of the
pump.
Abnormally high differential
pressure*
STOP THE MACHINE IM-
MEDIATELY !
Safety valves do not open
despite too high differential
pressure.
• Dismantle and clean valve
and possibly readjust.
Blockages on inlet side or
outlet side of the blower.
• Clean the pipe system
and look for mechanical
or control system related
blockages or obstructions
that can lead to increased
loss of pressure.
Fault on check valve. • Replace check valve.
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