Pfeiffer Vacuum OKTA 18000, Operating Instructions Manual

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Malfunctions
9 Malfunctions
Please note the following instructions should the pump malfunction:
9.1 Rectifying malfunctions
CAUTION
Hot surface!
Danger of burns if hot parts are touched. The surface temperature of the pump may rise
above 105 °C in case of malfunction.

Carry out work on the pump only after it has cooled to a safe temperature.
Problem Possible causes Remedy
Pump does not start No mains voltage or voltage does
not correspond to the motor data Check mains voltage and mains fuse protec-
tion; check motor switch
Thermal protection switch has re-
sponded Identify cause and delete; let pump cool off
if necessary
Suction chamber dirty Clean suction chamber.
Gear wheels damaged Switch off pump directly! Contact Pfeiffer
Vacuum Service if necessary
Bearing damaged Replace bearings; contact Pfeiffer Vacuum
Service if necessary.
Motor defective Replace motor
Pump switches off
after a while Thermal protection switch of the
motor has responded Identify cause of overheating and delete; al-
low motor to cool off if necessary
Pump does not attain
ultimate pressure Suction chamber dirty Clean suction chamber.
Lubricant dirty Change lubricant
Backing pump faulty Check backing pump
Leak in system Repair leak
Operational loss of lubricant at the
shaft or mechanical seal Check and replace radial shaft seals or me-
chanical seal; contact Pfeiffer Vacuum Ser-
vice if necessary
Unusual operating
noises Suction chamber dirty Switch off pump directly and clean suction
chamber
Bearings or gears damaged Switch off pump directly! Contact Pfeiffer
Vacuum Service if necessary
Motor bearing defective Switch off motor directly! Replace motor;
contact Pfeiffer Vacuum Service if neces-
sary
NOTICE
Service work should be carried out by a qualified person only!
Pfeiffer Vacuum is not liable for any damage to the pump resulting from work carried out
improperly.
 Take advantage of our service training programs; additional information at www.pfei-
ffer-vacuum.com.
 Please state all the information on the pump rating plate when ordering spare parts.