11
All pump bearings are arranged outside the working
chamber, are enclosed and have lifetime lubrication. Under
normal operating conditions the pumps need no servicing.
It is not necessary to check the operating fluid. Valves and
diaphragms are subject to wear and tear. At the latest when
the attained pressure levels begin to deteriorate the
diaphragms and the valves should be cleaned and checked
for cracks.
6.1. Precautionary Measures During
Maintenance Work
Whenever working on the pump ensure the
motor cannot get switched on.
If necessary, remove pump from the system for
inspection. Before dismantling allow the pump
to cool down.
➡
Only dismantle the pump as far is necessary to effect
repairs; only use genuine parts as per the spare parts list
when carrying out inspection work.
➡
Use only benzin or the like for cleaning. Do not use
solvents.
Ensure compliance with local regulations when
working with solvents.
Toxic gases and vapours can arise when carry-
ing out inspection work on corrosive gas versi-
on pumps (“C”). Pumps must be
decontaminated before inspection. Only
qualified personnel are permitted to carry out
maintenance and repair work and the regulations must be
observed.
6. Maintenance
Problem
Possible cause
Remedy
Pump does not attain final pressure
•
Condensate in the pump
•
Run pump for a longer period under
atmospheric pressure; open gas ballast valve.
•
Open gas ballast valve
•
Close gas ballast valve.
•
Valves/diaphragms
•
Clean or replace valves and diaphragms,
defective/dirty
see section 6.
•
Leak in system
•
Repair leak.
Unusual operating noises
•
Valves/diaphragms defective
•
See maintenance in section 6.
•
Dirt in the working chamber
•
Clean working chamber.
•
Silencer loose or missing
•
Check silencer; clean or replace.
•
Valves defective
•
Change valves.
•
Motor fan defective
•
Change motor fan.
•
Con-rod or motor bearing defective
•
Inform Pfeiffer-Service.
Pump does not start
•
No mains voltage
•
Check control voltage (see section 3.5.)
•
Phase failure
•
Check fuse.
•
Motor contactor switch has
•
Switch off pump the or isolate the pump from
mains, wait appr. five minutes for cooling
down, before restarting the pump.
•
Ambient temperature < 12 °C
•
Warm pump.
•
Dirty valves/diaphragms
•
See maintenance in section 6.
•
Over-pressure in the exhaust line
•
Open exhaust line (open exhaust valve).
Pump switches off
•
Sticking diaphragms
•
Clean pump (see section 6.).
•
Wrong mains voltage
•
Correct as per rating plate.
5. What To Do In The Case Of Breakdowns ?
