VACUUBRAND PC 620 NT plastic housing - Manual (Page 89)

page 89 of 113
Fault Possible cause Remedy
❑ Digital pressure
reading is flashing,
one blip*.
➨ Overpressure at the
pressure transducer,
pressure > 795 Torr
(1060 mbar)?
✔ Release pressure imme-
diately (risk of bursting).
❑ Warning triangle
and black valve
symbol are flash-
ing, two blips*.
➨ External venting valve
removed or defective?
✔ Connect valve or replace
with a new one or recon-
figure without valve.
❑ Warning triangle
and valve symbol
are flashing, three
blips*.
➨ NT VARIO / VARIO-B
pump and in-line valve
connected?
✔ Disconnect in-line valve;
switch controller off/on to
reconfigure.
❑ Warning triangle
and coolant valve
symbol are flash-
ing, four blips*.
➨ Coolant valve removed
or defective?
✔ Check connection cable
of the valve; or use new
valve or reconfigure with-
out valve.
❑ No digital pressure
reading. Warning
triangle is flashing,
five or seven blips*.
➨ Five blips: External
sensor defective or
removed?
✔ Plug in external sensor or
use new one or reconfig-
ure without sensor.
➨ Seven blips: Internal
sensor defective?
✔ Contact local distributor.
❑ Warning triangle
and pump symbol
are flashing, six
blips*.
➨ NT VARIO / VARIO-
B pump and VMS**
(Vacuum Management
System) connected?
✔ Remove one component.
Restart controller.
➨ Fault at the NT VARIO
pump or at the VMS?
✔ Check pump and/or VMS
or reconfigure.
➨ Fault at the NT VARIO /
VARIO-B pump?
✔ Check pump, restart con-
troller.
❑ Clock symbol is
flashing.
➨ Preselected process
time is over?
✔ Confirm by pressing
START/STOP key.
❑ Venting valve does
not respond, valve
symbol is displayed.
➨ External pressure
transducer connected
and active?
✔ Select internal sensor or
connect an external vent-
ing valve.
❑ Venting valve does
not respond, valve
symbol is dis-
played.
➨ Venting valve contami-
nated?
✔ Clean valve.
❑ ”Vac control” func-
tion: Control stops,
”arrow up” is flash-
ing.
➨ Preset maximum pres-
sure exceeded?
✔ Confirm by pressing
START/STOP key.
Change maximum pres-
sure value if necessary.