Owner manual

page 65 of 74
Fault Possible cause Remedy
❑
No display.
➨
Power supply not
plugged in (wall plug)?
✔
Plug in power supply.
➨
CVC 3000 detect con-
troller switched off?
✔
Switch on controller.
➨
VACUU • BUS cable
of power supply not
plugged in at control-
ler?
✔
Plug in VACUU • BUS
cable at controller.
➨
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 detect
or external gauge head.
➨
Humidity in the pres-
sure transducer?
✔
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 ash-
ing, display shows
”0.0”.
➨
Pressure transducer
not correctly adjusted
under vacuum?
✔
Adjust CVC 3000 detect
or external gauge head
correctly.
❑
No digital pressure
reading.
➨
Pressure transducer
defective?
✔
Contact local distributor.
❑
Digital pressure
reading is ashing,
one blip*.
➨
Overpressure at the
pressure transducer,
pressure > 795 Torr
(1060 mbar)?
✔
Release pressure imme-
diately (risk of bursting).
Troubleshooting