VACUUBRAND PC 3012 NT VARIO Duo - Manual (Page 101)

page 95 of 145
Fault Possible cause Remedy
❑ No display. ➨ Electrical power cord
not plugged in, electri-
cal supply failure?
✔ Plug in power cord.
Check fuse.
➨ Device fuse blown? ✔ Identify cause of failure.
Replace device fuse.
➨ Controller CVC 3000
or pump NT VARIO
switched off?
✔ Switch on controller and/
or pump.
➨ VACUU•BUS cable
between pump and
controller not plugged
in at controller?
✔ Plug in VACUU•BUS
cable at CVC 3000 con-
troller.
➨ Other than above men-
tioned causes?
✔ Contact local distributor.
❑ Display disappears. ➨ Too much load (e.g.,
valves) connected?
✔ Check current draw of the
connected devices.
➨ Short circuit at connect-
ed valves?
✔ Replace valves.
➨ Short circuit at the
RS 232 plug?
✔ Check plug and cable.
➨ Other than above men-
tioned causes?
✔ Contact local distributor.
❑ Pressure reading
incorrect.
➨ Pressure transducer
decalibrated?
✔ Readjust CVC 3000.
➨ Humidity in the mea-
surement chamber?
✔ Let the pressure trans-
ducer dry, e.g., by pump-
ing. Readjust if neces-
sary. Determine and
eliminate the cause for
humidity.
➨ Pressure transducer
contaminated?
✔ See ”Cleaning the pres-
sure transducer”.
➨ Other than above men-
tioned causes?
✔ Contact local distributor.
❑ Digital pressure
reading is flash-
ing, display shows
”0.0”.
➨ Pressure transducer
not correctly adjusted
under vacuum?
✔ Adjust CVC 3000 cor-
rectly.
Troubleshooting