KNF SCC 950 Operating Instructions Manual page 50

Troubleshooting
The hand terminal
display shows "No
connection", when a
button on the
touchscreen is
touched a warning
sound is output.
Vacuum pump
system does not
respond to the
entries on the hand
terminal although
there is no "No
connection" mes-
sage and the pres-
sure display is
shown.
Hand terminal's
signal tone sounds.
The hand terminal's
maximum service
duration in wireless
operation is noticea-
bly shorter.
Although the hand
terminal is on the
vacuum pump
system, the vacuum
pump system cannot
be controlled.
Pressure display
shows implausible
values.
50 Translation of original Operating Instructions, English, KNF 304771-304773 07/18
Vacuum pump sys-
tem switched off.
The hand terminal
belongs to a different
SCC 950 vacuum
pump system.
Wireless connection
is interrupted.
Wireless module
defective.
The hand terminal
belongs to a different
SCC 950 vacuum
pump system that is
in operation.
Batteries almost
empty.
Batteries at end of
service life.
The contacts on the
base of the hand
terminal or in the
vacuum pump sys-
tem's holder are dirty.
Pressure units were
changed.
Leak in the system.
Pressure sensor has
to be recalibrated.
Tab. 10 (2nd part)
Vacuum pump system SCC 950
 Switch on vacuum pump system with mains
power switch. Mains power switch must illumi-
nate.
 Use the paging function (see Paging the vacu-
um pump system, page 34) to determine wheth-
er the correct hand terminal is used.
 Check whether the hand terminal is being used
outside the wireless range.
 Make sure that the wireless space is not dis-
turbed by electric devices or metal objects.
 If necessary, place hand terminal onto the
system in order to identify that the wireless con-
nection is the source of the problem.
 Contact KNF Service.
 Use the paging function (see Paging the vacu-
um pump system, page 34) to determine wheth-
er the correct hand terminal is used.
 Place hand terminal on switched on system to
charge the batteries.
 Alternatively: Run hand terminal via the power
supply.
 Change batteries (see Chapter 8.1.3, page 35).
 Clean contacts.
 Select the desired pressure unit.
 See Tab. 9, "Insufficient vacuum generated
although the pump is running."
 Contact KNF Service.