Vacuum Pump System SC 920G
Troubleshooting
Translation of original Operating Instructions, English, KNF 121308-121311 07/18
43
Hand terminal
Problem
Cause
Solution
Problem with wireless
connection.
Check whether the hand terminal is
being operated outside the wireless
connection range.
Check that the wireless connection
is not obstructed by any electrical
devices or metal objects.
Otherwise, to confirm that the prob-
lem lies in the wireless connection,
place the hand terminal in the holder
provided on the vacuum pump
system.
Defective wireless module.
Contact KNF Service.
Vacuum pump system does
not respond to commands
input at the hand terminal
after removal from the
system, even though the "No
connection " is no longer lit
up and a pressure is
displayed.
The hand terminal is
designed for use with a
different SC 920G system,
which is currently in
operation.
Use the page function (see Actuating
the vaccum pump system, p. 29) to
check whether the right hand termi-
nal is being used.
Acoustic alarm sounds on
hand terminal.
Batteries low.
Charge batteries by placing the
terminal in the holder provided on
the vacuum pump system, with the
system switched on.
Alternatively, operate the terminal
via the power supply.
Marked decrease in operating
time for the hand terminal in
wireless mode.
Batteries have reached
limit of their useful life.
Change batteries (see chapter 8.1.3,
p. 31).
Vacuum pump system cannot
be activated, even with the
hand terminal placed in the
holder provided.
Soiled contacts on the
bottom of the hand terminal
or in the holder for the
terminal on the vacuum
pump system.
Clean contacts.
Pressure display shows
implausible values.
Unit of pressure for display
has been changed.
Set desired unit of pressure.
Leaks in system.
See Tab. 8, "Required vacuum not
generated even though pump is
running”.
Recalibration of pressure
sensor required.
Contact KNF Service.
Tab. 8
