vacuubrand ME 4C NT VARIO Instructions For Use Manual

Also see for MD 12C VARIO-B: Instructions for use

Contents

vacuubrand ME 4C NT VARIO Instructions For Use Manual Manual pdf 95 page image

page 95 of 129Fault Possible cause Remedy❑ No display. ➨ Electrical power cordnot plugged in, electri-cal supply failure?✔ Plug in power cord.Check fuse.➨ Device fuse blown? ✔ Identify cause of failure.Replace device fuse.➨ Controller CVC 3000or pump NT VARIO /VARIO-B switched off?✔ Switch on controller and/or pump.➨ VACUU•BUS cablebetween pump andcontroller not pluggedin at controller?✔ Plug in VACUU•BUScable 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 theconnected devices.➨ Short circuit at connect-ed valves?✔ Replace valves.➨ Short circuit at theRS 232 plug?✔ Check plug and cable.➨ Other than above men-tioned causes?✔ Contact local distributor.❑ Pressure readingincorrect.➨ Pressure transducerdecalibrated?✔ 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 andeliminate the cause forhumidity.➨ Pressure transducercontaminated?✔ See ”Cleaning the pres-sure transducer”.➨ Other than above men-tioned causes?✔ Contact local distributor.❑ Digital pressurereading is flash-ing, display shows”0.0”.➨ Pressure transducernot correctly adjustedunder vacuum?✔ Adjust CVC 3000 cor-rectly.Troubleshooting