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Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999188 / 19/05/2009
Troubleshooting
Fault
Possible cause
Remedy
❑
No display.
➨
Mains not plugged in?
✔
Plug in mains plug of pump-
ing unit.
➨
Device switched off?
✔
Switch on device.
➨
VACUU • BUS
cable to inter-
nal power supply not plugged
in at controller?
✔
Plug in VACUU • BUS
cable
at controller CVC 3000.
➨
Other causes (device defec-
tive)?
✔
Contact local distributor.
❑
Display disappears.
➨
Too much load (e.g. valves)
connected?
✔
Check current draw of the
connected devices.
➨
Short circuit at connected
valves?
✔
Replace valves.
➨
Short circuit at the RS 232
plug?
✔
Check plug and cable.
➨
Other causes (device defec-
tive)?
✔
Contact local distributor.
❑
Pressure reading incor-
rect.
➨
Device not adjusted?
✔
Readjust CVC 3000.
➨
Humidity in the measurement
chamber?
✔
Let the pressure transducer
dry, e.g. by pumping. Read-
just if necessary. Determine
and eliminate the cause for
humidity.
➨
Pressure transducer contami-
nated?
✔
See „Cleaning the pressure
transducer“.
❑
Digital pressure read-
ing is flashing, ”0.0” is
displayed.
➨
Pressure transducer not
correctly adjusted under
vacuum?
✔
Adjust CVC 3000 correctly.
❑
No digital pressure read-
ing.
➨
Pressure transducer defec-
tive?
✔
Contact local distributor.
❑
Digital pressure reading
is flashing, one blip*.
➨
Overpressure at the pressure
transducer, pressure > 1060
mbar?
✔
Release pressure immedi-
ately (risk of bursting).
❑
Warning triangle and
black valve symbol are
flashing, two blips*.
➨
External venting valve re-
moved or defective?
✔
Connect valve or replace by
a new one or reconfigure
without valve.
❑
Warning triangle and
valve symbol are flash
-
ing, three blips*.
➨
NT VARIO / VARIO-B pump
and in-line valve connected?
✔
Disconnect one component,
switch controller off/on.
❑
Warning triangle and
coolant valve symbol are
flashing, four blips*.
➨
Coolant valve removed or
defective?
✔
Check connection cable of
the valve or use new valve or
reconfigure without valve.
