16
BÜCHI Vac V-511/512/5135 Operation
5.2 Troubleshooting
Problem Possible Cause Correction
No display on Vacuum Controller Apparatus is not connected Turn on all power switches
Check all power connections
Check fuse on V-800
Frequent operation of the valve The system has a leak Check all possible places for leaks
and the pump (hoses and connections)
The selected hysteresis is Set hysteresis at a higher value (if the final vacutoo low um is higher than 700 mbar, set for automatic
hysteresis)
Valve does not operate Valve does not close Separating membrane is defect
Valve cable is not connected (Connection "V"
on V-800)
No vacuum Incorrect hose connections Cf. Chapter 4.2, Installation
Incorrect cable connections Cf. Chapter 4.2, Installation
Vacuum is not achieved Solvent residue in system Empty valve unit and, after drying, replace it.
Start the pump with an open vacuum hose and
allow it to run for 1-2 minutes. Any remaining
vapors will be blown out.
Valve plate in the pump is dirty Clean or replace the valve plate.
Cf. Chapter 6.2
Pump membrane is defective Replace the membrane
Vacuum not achieved in the Backstroke valve has a leak Clean the backstroke valve
second Rotavapor
Table 4: Troubleshooting
Error messages on Vacuum Controller:
Error—0 Automatic temperature sensor defective Call customer service
Error—1
Error—2
Error—3 Pressure sensor defective Call customer service
Error—4 Software error Call customer service
Error—5
Error—6 Hardware error Call customer service
Error—7 Pressure sensor is not calibrated Call customer service
Error—8 Pressure has increased above 1400 Avoid excess pressure in the system
Error—9 Leak rate is too high Evacuate apparatus dry
Leak rate < 5mbar/min.
Pump is too weak To less water pressure in the water jet pump
Clogged water jet pump
Defective pump
Configure apparatus (see 4.6)
Back evaporation Empty receiving flask
Error-10 Hardware error Call customer service
Table 5: Error messages on Vacuum Controller