VACUUBRAND PC 600 LAN NT - Manual (Page 77)

page 77 of 102
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 at
switch output of VNC 2 or
at diaphragm pump.
➨ Device switched off? ✔ Switch on controller and/
or pump.
➨ Other than above men-
tioned causes?
✔ Contact local distributor.
❑ Display disappears,
internal overload
protection activated.
➨ Too much load (e.g.,
valves) connected?
✔ Check current draw of
the connected devices
(pump, valves).
➨ Thermal overload at
controller, ambient tem-
perature too high?
✔ Ensure sufficient ventila-
tion.
➨ 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 VNC 2.
➨ 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.
❑ Error message
”ErrValve”, two
blips*.
➨ External venting valve
removed or defective?
✔ Connect or check valve or
replace with a new one or
reconfigure without valve.
Switch VNC 2 off/on.
Troubleshooting