Troubleshooting
74 03.06.2014
8 Troubleshooting
WARNING
Injury hazard!
Ignorance of proper machine handling is very dangerous.
Improper handling can lead to serious injuries.
For all service and repair work:
¾ Make sure you observe the safety instructions and accident
prevention regulations.
¾ Disconnect the unit's power supply from the mains electricity.
¾ Only qualified electricians are permitted to work on electrical
modules.
¾ Service and repair work should be carried out by authorised
technicians only.
8.1 Malfunctions with diagnostic message
Symptom Cause Solution
• Vacuum pump does not
switch off.
• Notify the service. 67
• Ventilation valve does not
open.
• Notify the service.
• No gas available or near end. • Connect inert gas or ensure
that there is sufficient gas
supply (e.g. change gas bot-
tle).
• Stop valve for the gas supply
is closed.
• Open the stop valve for the
gas supply.
• Gas hose has a kink in it. • Remove the kink in the gas
hose.
• Value for the gas flushing
pressure is set such that it
cannot be reached.
• Correct the value for Gas
flushing pressure.
• The vacuum sensor is incor-
rectly calibrated.
• Notify the service.
• Vacuum sensor is defective. • Notify the service.
68
• Gas valve does not open. • Notify the service.
69 • Value for the Evacuation
pressure is set so low that it
cannot be reached.
• Correct the value for Evacua-
tion pressure.
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