VACUUBRAND PC 620 NT plastic housing - Manual (Page 90)

page 90 of 113
Fault Possible cause Remedy
❑ ”Pump down” func-
tion: Control stops,
”arrow down” is
flashing.
➨ Pressure below preset
minimum pressure?
✔ Confirm by pressing
START/STOP key.
Change minimum pres-
sure value if necessary.
❑ No function is dis-
played, no menu is
available.
➨ No controllable device
(valve, VMS, VARIO
pump) connected?
✔ Connect device at CVC
3000. Switch CVC 3000
off/on to reconfigure.
❑ Controller does
not respond when
pressing keys (ex-
cept ON/OFF).
PC symbol is dis-
played.
➨ Controller in remote
mode?
✔ Control CVC 3000 via in-
terface or switch off re-
mote mode.
❑ Controller does
not respond when
operating any keys.
No change after
switching off/on.
✔ Contact local distributor.
❑ Pump does not
start or stops im-
mediately. Warning
triangle and pump
symbol are flash-
ing.
➨ Motor overloaded? ✔ Allow motor to cool down,
identify and eliminate
cause of failure. Manual
reset is necessary. Switch
off pump or unplug.
➨ Overpressure in outlet
line?
✔ Remove blockage in line,
open valve.
➨ Pump has been ex-
posed to condensate?
✔ Allow pump to run for
some minutes with atmo-
spheric pressure at the
inlet.
❑ Pump does not
achieve its ultimate
vacuum or usual
pumping speed.
➨ Leak in the pipeline or
in the vacuum system?
✔ Check connections, pipe-
line and vacuum system.
➨ Wrong setting at con-
troller?
✔ Select function ”Pump
down” and check again.
➨ Long, narrow vacuum
line?
✔ Use lines with larger di-
ameter, length as short as
possible.
➨ Pump has been ex-
posed to condensate?
✔ Allow pump to run for
some minutes with atmo-
spheric pressure at the
inlet to purge.