Heidolph ROTAVAC Vario pumping unit - Manual (Page 46)

page 46 of 61
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999248 / 28/04/2011
Fault Possible cause Remedy
❑ No display. ➨ Mains not plugged in? ✔ Plug in mains plug.
➨ Controller or pumping unit
switched off?
✔ Switch device on.
➨ BUS cable to internal power
supply not plugged in?
✔ Plug in BUS cable at control-
ler.
➨ Other causes (device defec-
tive)?
✔ Contact local distributor.
❑ Display disappears. ➨ Short circuit at connected
valves?
✔ Replace valves.
➨ Short circuit at the RS 232
plug?
✔ Check plug and cable.
➨ Other causes (device defec-
tive)?
✔ Contact local distributor.
❑ Pressure reading incor-
rect.
➨ Pressure transducer not
adjusted?
✔ Readjust the controller.
➨ Humidity inside the pressure
transducer?
✔ Let the pressure transducer
dry, e.g. by pumping. Read-
just if necessary. Determine
and eliminate the cause for
humidity.
➨ Pressure transducer contami-
nated?
✔ See „Cleaning the pressure
transducer“.
❑ Digital pressure reading
is flashing, display shows
”0.0”.
➨ Pressure transducer not
correctly adjusted under
vacuum?
✔ Adjust controller correctly.
❑ No digital pressure read-
ing.
➨ Pressure transducer defec-
tive?
✔ Contact local distributor.
❑ Digital pressure reading
is flashing, one blip*.
➨ Overpressure at the pressure
transducer, pressure > 1060
mbar?
✔ Release pressure immedi-
ately (risk of bursting)!
❑ Warning triangle and
coolant valve symbol are
flashing, four blips*.
➨ Coolant valve removed or
defective?
✔ Check connection cable of
the valve or use new valve or
reconfigure without valve.
❑ No digital pressure read-
ing, warning triangle is
flashing, seven blips*.
➨ Seven blips: Internal sensor
defective?
✔ Contact local distributor.
❑ Warning triangle and
pump symbol are flash-
ing, six blips*.
➨ Fault at the pump? ✔ Check pump, restart control-
ler.
❑ Clock symbol is flashing.
Control is stopped.
➨ Preselected process time is
over?
✔ Confirm by pressing key
START/STOP.
9 Troubleshooting
* Blips only if in function ”Configuration” sound is set to ”On”.