AlphaDynamik ATLAS C Series, Installation, Operation And Maintenance Manual, Page: 12 / 44

6. Troubleshooting
The following table provides solutions to problems that might arise during pump operation. The pump is assumed to
have been properly installed and correctly selected for the application.
Please contact the manufacturer or distributor if you require technical assistance
.
If the problems persist , stop using the pump immediately. Contact the pump
manufacturer or their representative
-12-
Operation problems Probable causes
Motor overload 8,9,13,19
The pump does not provide enough flow of pressure 1,2,4,5,7,9,10,16,17,18
No pressure on the discharge side 2,3,6,17
Uneven discharge flow pressure 1,2,4,5,6,9,20
Noise and vibration 2,4,5,6,7,8,9,10,13,14,18,19
The pump gets clogged 9,10,14,19
Overheated pump 8,9,10,14,19
Excessive wear 4,5,10,14,18
The mechanical seal leaks 11,12,15
Νο
Probable causes Solutions
1 Wrong direction of rotation Reverse the direction of rotation
2 NPSH is not high enough
Increase the available NPSH
•
Place the suction tank higher
•
Place the pump lower
•
Reduce steam pressure
•
Increase the diameter of the suction pipe
•
Shorten and simplify the suction pipe
3 Pump not drained Drain or fill
4 Cavitation Increase suction pressure (see also 2)
5 Air is suctioned by the pump Check the suction pipe and all its connections
6 Clogged suction pipe Check the suction pipe and all its filters , if any
7 Discharge pressure too high
If necessary , reduce load losses , eg by increasing the
diameter of the pipe.
8 Flow too high Reduce speed
9 Fluid viscosity too high Reduce the viscosity e.g by heating the fluid
10 Fluid temperature too high Reduce the temperature by cooling the fluid
11 Mechanical seal damaged or worn out Replace the seal
12 O-rings unsuitable for the fluid Fit suitable orings
13 Stressed pipes
Connect the pipes to the pump so as to avoid stress and
align the coupling
14 Foreign matter in the fluid Fit a filter to suction pump
15 The mechanical seal tension is too low Adjust according the instructions of this manual
16 Pump speed too low Increase speed
17 Pump too small Chose a larger pump size
18 The stator is worn out or hase operated in vacuum Replasce the stator
19 Pump and /or motor not attached to the bedplate
Attach the pump and/or motor and check whether the
pipes are connected without stress
20 Flow reduction Replasce the worn stator