16
BÜCHI
Vac
V-511/512/513
5 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 vacu-
too 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
