VWR VP 8 Vac Manuel D'instructions page 16

English
Flow rate, pressure or vacuum too low
The system/the pump does not achieve the output specified in the Technical data or the data sheet.
Cause
After diaphragm and valve plates/sealings
have been replaced.
Tab. 7
Pump does not run; the On/Off switch of the system at control unit is switched on, but is not lit;
the On/Off switch of the pump at control unit is switched on, but is not lit; the On/Off switch of the
pump is switched on, but is not lit
Cause
Vacuum system is not connected with the
power source.
No voltage in the power source.
Tab. 8
Pump does not run; the On/Off switch of the system at control unit is switched on and is lit; the
On/Off switch of the pump at control unit is switched on and is lit; the On/Off switch of the pump is
switched on, but is not lit
Cause
Pump is not connected with the control unit.
Fuse in the pump is defective.
Tab. 9
Pump does not run; the On/Off switch of the system at control unit is switched on and is lit; the
On/Off switch of the pump at control unit is switched on and is lit; the On/Off switch of the pump is
switched on and is lit
Cause
The thermal switch has opened due to
overheating.
Tab. 10
No display in in digital vacuum meter
Cause
Digital vacuum meter not turned on.
System not turned on.
Tab. 11
Fault cannot be rectified
If you are unable to determine any of the specified causes, send the pump to VWR Customer Service.
1. Flush the pump to free the pump head of dangerous or aggressive gases (see chapter 8.2.1).
2. Remove the pump.
3. Clean the pump (see chapter 8.2.2).
4. Send the pump to VWR with a filled out decontamination declaration (see appendix) and specification of
the medium transferred.
16
Fault remedy
 Check that the spacers have been replaced onto the
diaphragm screw thread.
 Check head connection and hose connections.
 Possibly carefully tighten the outer screws (fig. 10/4)
of the top plate crosswise.
Fault remedy
 Connect vacuum system to mains power.
 Check room fuse and switch on if necessary.
Fault remedy
 Connect mains plug of pump to the socket of control
unit.
 Remove pump's mains plug from the socket.
 Loosen marked lid on underside of the pump.
 Select and replace suitable fuse (see chapter 4).
Fault remedy
 Remove pump´s mains plug from the socket.
 Allow pump to cool.
 Trace cause of over-heating and eliminate it.
Fault remedy
 Turn digital vacuum meter on.
 Turn system on.