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Troubleshooting
Fault
Vacuum controller dis-
play does not light up.
The message "No con-
nection" appears per-
manently in the display
of the vacuum con-
troller; if a button on
the touchscreen is
pressed, a warning sig-
nal is emitted.
Vacuum pump system
does not respond to
entries on the vacuum
controller when it has
been removed, al-
though the "No con-
nection" message dis-
appears and the pres-
sure display appears.
Vacuum controller
emits an acoustic sig-
nal.
The maximum operat-
ing time of the vacuum
controller is signifi-
cantly reduced by wire-
less operation.
Pressure display re-
turns implausible val-
ues.
98
Cause
Vacuum controller not switched on.
Batteries in the vacuum controller dead.
Vacuum system switched off.
The vacuum controller belongs to a different vacuum
pump system SC800G.
Wireless connection failed.
Wireless module faulty.
The vacuum controller belongs to a different vacuum
pump system SC800G, which is in use.
Batteries almost dead.
Batteries have reached the end of their service life.
The pressure unit in the display was changed.
Leaks in the system.
Recalibration of the pressure sensor necessary.
Tab.38: Troubleshooting: Vacuum controller
Translation of Originial Operating Instruction, KNF 339416-339418 02/23
Vacuum system SC820G / SC840G
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