BUCHI Pump Module C-605 - Manual (Page 43)

8 Troubleshooting
43 Pump Combinations Operation Manual, Version E
When the measures above are not successful, continue as follows:
• Localizing the defective valve:
– Let the pump module run with low flow rate (10 ml/min) and pull the suction tube out of the
solvent bottle for a short time (about 1 second).
– Observe, at which of the three suction tubes the air bubble does not disappear after 1 minute.
– Switch off the pump.
– Dismount the inlet valve. Make sure that the thin PTFE sealing does not get lost.
– Blow out the valve with compressed air.
– Remount the inlet valve.
– Let the pump run again.
– Blow out the valve with compressed air
If this procedure is not successful:
– Dismount the inlet valve again and make sure that the thin PTFE sealing does not get lost.
– Rinse it with solvents, e.g. aceton.
– Remount the inlet valve.
– Let the pump run again.
If this procedure is not successful:
– Dismount the inlet valve and exchange it with a new one.
– Let the pump run again.
Now the inlet valves should function properly. Restart the pump. It should also function properly now.
If not, carry out the same procedure for the outlet valves as carried out for the inlet valves. Thereby
always consider the thin PTFE sealing.
After all valves have been checked successfully the pump operates correctly. If all attempts to elimi-
nate pulsating flow rates fail, contact the BUCHI Customer Service.
8 .3 Customer service
Only authorised service personnel are allowed to perform repair work on the instrument. These
persons have comprehensive technical training and knowledge of possible dangers which might arise
from the instrument.
Contacts for official BUCHI customer service offices are given on the BUCHI website at: www.buchi.
com. If malfunctions occur on your instrument or you have technical questions or application prob-
lems, please contact one of these offices.
The customer service offers the following:
• Spare part delivery
• Repairs
• Technical advice
Before calling us
Our service personnel will be able to service you more efficiently if you have the following information:
• The serial number and the model number of the instruments involved
• The installation procedure that you used
• A list of concise symptoms
• A list of operating procedures and conditions that you were using when the problem arose
• A list of other devices connected to the system and a description of those connections
• A list of other electrical connections on the same circuit in the room