page 97 of 121
Fault
Possible cause
Remedy
❑
”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.
❑
”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.
➨
No controllable device
(valve, VARIO pump,
VMS) connected?
✔
Connect devices or use
controller as measuring
device.
❑
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.
➨
Pump has been ex-
posed to condensate?
✔
Allow pump to run for
some minutes at maxi-
mum speed with atmo-
spheric pressure at the
inlet.
➨
Overpressure in outlet
line?
✔
Remove blockage in line,
open valve.
❑
Pump does not
achieve its ultimate
vacuum or usual
pumping speed.
➨
Centring ring at small
flange connection not
correctly positioned, or
leak in the pipeline or
vacuum system?
✔
Check pump directly, then
check connection, pipe-
line and vacuum system if
necessary.
➨
Wrong setting at con-
troller?
✔
Select function ”Pump
down” with speed set to
”HI” 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.
