Troubleshooting - vacuubrand ME 4C NT VARIO Instructions For Use Manual

Troubleshooting

Fault
❑ No display.
❑ Display disappears.
❑ Pressure reading incor-
rect.
❑ Digital pressure reading
is flashing, display shows
"0.0".
❑ No digital pressure read-
ing.
❑ Digital pressure reading
is flashing, one blip*.
❑ Warning triangle and
black valve symbol are
flashing, two blips*.
❑ Warning triangle and
valve symbol are flash-
ing, three blips*.
❑ Warning triangle and
coolant valve symbol are
flashing, four blips*.
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.: 999164 / 19/05/2009
page 52 of 75
Possible cause
➨
Mains not plugged in?
➨
Controller CVC 3000 or
pump NT VARIO / VARIO-B
switched off?
➨
VACUU • BUS cable between
pump and controller not
plugged in at controller?
➨
Other causes (device defec-
tive)?
➨
Too much load (e.g. valves)
connected?
➨
Short circuit at connected
valves?
➨
Short circuit at the RS 232
plug?
➨
Other causes (device defec-
tive)?
➨
Pressure transducer not
adjusted?
➨
Humidity in the measurement
chamber?
➨
Pressure transducer contami-
nated?
➨
Pressure transducer not
correctly adjusted under
vacuum?
➨
Pressure transducer defec-
tive?
➨
Overpressure at the pressure
transducer, pressure > 1060
mbar?
➨
External venting valve re-
moved or defective?
➨
NT VARIO / VARIO-B pump
and in-line valve connected?
➨
Coolant valve removed or
defective?
Remedy
✔
Plug in mains plug of NT
VARIO / VARIO-B pump.
✔
Switch on devices.
✔
Plug in VACUU • BUS cable
at controller CVC 3000.
✔
Contact local distributor.
✔
Check current draw of the
connected devices.
✔
Replace valves.
✔
Check plug and cable.
✔
Contact local distributor.
✔
Readjust CVC 3000.
✔
Let the pressure transducer
dry, e.g. by pumping. Read-
just if necessary. Determine
and eliminate the cause for
humidity.
✔
See „Cleaning the pressure
transducer".
✔
Adjust CVC 3000 correctly.
✔
Contact local distributor.
✔
Release pressure immedi-
ately (risk of bursting).
✔
Connect valve or replace by
a new one or reconfigure
without valve.
✔
Disconnect in-line valve,
switch controller off/on.
✔
Check connection cable of
the valve or use new valve or
reconfigure without valve.