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

Troubleshooting

Fault
❑ No display.
❑ Display disappears. ➨ Too much load (e.g.,
❑ Pressure reading
incorrect.
❑ Digital pressure
reading is flash-
ing, display shows
"0.0".
page 95 of 129
Possible cause
➨ Electrical power cord
not plugged in, electri-
cal supply failure?
➨ Device fuse blown?
➨ Controller CVC 3000
or pump NT VARIO /
VARIO-B switched off?
➨ VACUU•BUS cable
between pump and
controller not plugged
in at controller?
➨ Other than above men-
tioned causes?
valves) connected?
➨ Short circuit at connect-
ed valves?
➨ Short circuit at the
RS 232 plug?
➨ Other than above men-
tioned causes?
➨ Pressure transducer
decalibrated?
➨ Humidity in the mea-
surement chamber?
➨ Pressure transducer
contaminated?
➨ Other than above men-
tioned causes?
➨ Pressure transducer
not correctly adjusted
under vacuum?
Remedy
✔ Plug in power cord.
Check fuse.
✔ Identify cause of failure.
Replace device fuse.
✔ Switch on controller and/
or pump.
✔ Plug in VACUU•BUS
cable at CVC 3000 con-
troller.
✔ 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 trans-
ducer dry, e.g., by pump-
ing. Readjust if neces-
sary. Determine and
eliminate the cause for
humidity.
✔ See "Cleaning the pres-
sure transducer".
✔ Contact local distributor.
✔ Adjust CVC 3000 cor-
rectly.