BUSCH FOSSA Notice D'instructions page 28

Troubleshooting
No Troubles
1 Evacuation difficulties
2 Difficulty in obtaining the
ultimate vacuum
3 Overload
4 Heating of the vacuum
pump
5 Anormal noise of the
vacuum pump
6 Condensation within the
vacuum pump
Troubleshooting
Seite / Page 28
Causes/ check items
· Incorrect direction of motor rotation
· Suction pipe obstructed
· Leakage of suction pipe
· Inlet gauge obstructed
· Leakage in vacuum system
· Condensate formation within the vacuum
pump
· Worn tip seals
· Back pressure too high
· Defective bearings
· Vacuum pump contamined by process
residuals
· Ventilation too low
· Vacuum pump contamined by process resi-
duals
· Discharge pipe obstructed
· Defective motor
· Ambient temperature too high
· Discharge pipe obstructed
· Incorrect direction of motor rotation
· Vacuum pump contamined by process resi-
duals
· Defective bearings
· Suction of condensable vapours too high
· Defective gas ballast valve (accessory)
Actions
· Reverse polarity of 2 phases of the power supply
· Clean suction pipe
· Check suction pipe
· Clean or replace inlet gauge
· Check the vacuum system
· Vent the vacuum pump to atmospheric pressure or
use the gas ballast accessory (if fitted)
· Let check the vacuum pump by Busch Service
· Change tip seals
· Check discharge pipe
· Replace bearings by Busch Service
· Let check the vacuum pump by Busch Service
· Check the location of the vacuum pump
· Let check the vacuum pump by Busch Service
· Check discharge pipe
· Check motor
· Check ambient temperature
· Incorrect direction of motor rotation
· Reverse polarity of 2 phases of the power supply
· Let check the vacuum pump by Busch Service
· Replace bearings by Busch Service
· Check process
· Clean or replace gas ballast valve
FO 0015 A