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5. What To Do In The Case Of Breakdowns ?
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Pump fails to start or stops
➡
Supply failure or voltage to low
☞
Check supply voltage.
immediately.
➡
Pressure in outlet pipeline too high?
☞
Remove blockade in line, open valve.
➡
Motor overloaded?
☞
Allow motor to cool, identify cause of
failure.
➡
Ambient temperature < 12 °C
☞
Warm pump.
Pump does not achieve
➡
Long narrow line?
☞
Use line with larger diameter, length
final pressure or
as short as possible.
normal pumping speed
➡
Pump has been exposed to
☞
Run pump for a few minutes with
condensate?
gas ballast (“high”).
➡
Outgasing substances or vapor
☞
Check process parameters.
generated in the process?
➡
Leak in system
☞
Repair leak
➡
Deposits have been formed
☞
Clean and inspect pump heads.
inside the pump?
➡
Pump becomes too hot
☞
Reduce pump rotation speed, ensure enough
cooling or reduce input pressure.
➡
Radial shaft seal damaged
☞
Replace radial shaft seal.
➡
Worn piston seals
☞
Replace piston seals.
Pump stops during operation
➡
Thermal overload of
☞
Check ambient temperature: --> < 40°C or
motor or frequency converter
insufficient air circulation for the motor fan
☞
Check supply voltage.
Pump too noisy.
➡
Valves damaged
☞
Replace valve plates.
➡
Atmospheric or high pressure
☞
Connect hose to pump outlet.
at inlet port
➡
Worn piston seals
☞
Replace piston seals.
Pump runs durably with max.
➡
Radial shaft seal damaged
☞
Replace radial shaft seal.
rotation speed
➡
Leak in system
☞
Repair leak.
➡
Gas ballast valve in position “high”
☞
Set sliding sleeve of gas ballast valve in
position “low”.
➡
None of above mentioned causes?
☞
Return the equipment to Pfeiffer Vacuum
service.
