Operating instructions
6.1 Drained pumps
•
Turn by hand at least 1x week (do not switch on because of dry running).
•
If necessary, unblock by tapping gently on the shaft in axial direction.
•
Replace bearing oil after 2 years or grease after 4 years.
6.2 Filled pumps
•
Switch stand-by pumps on and immediately off again once a week.
•
If the stand-by pump is at operating pressure and temperature:
leave all sealing, flushing and cooling systems switched on.
•
Replace bearing oil after 2 years or grease after 4 years.
•
Do not tighten the stuffing box until there are no leaks.
7. Faults - Causes and Solutions
The following notes on causes of faults and how to repair them are intended as an aid to
recognising the problem. The manufacturer's Customer Service Department is available to help
repair faults that the operator cannot or does not want to repair. If the operator repairs or changes
the pump, the design data on the Data Sheet and Points 1.2-1.4 of these Operating Instructions
should be particularly taken into account. If necessary, the written agreement of the manufacturer
must be obtained.
Faults
Code no. for cause and method of repair
Discharge too low
1, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17
Discharge stops after a time
8, 10, 11, 12, 30
Head too low
2, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 30, 34
Head too high
3, 5, 34
Drive mechanism overloaded
2, 3, 5, 15, 16, 25, 27
Pump not running quietly
7, 10, 14, 22, 23, 24, 25, 29, 30, 33
Temperature in the pump too high
7, 10, 30
Temperature in the shaft sealing too high
17, 18, 19, 20, 21
Temperature at the bearing too high
2, 14, 23, 24, 25, 26, 29, 31, 32
Pump leaking
25, 28
Leakage rate at shaft sealing too high
16, 19, 20, 21, 22, 23, 25
Meaning of code number for cause and method of repair
1.
Back-pressure too high
•
open discharge valve further
•
reduce resistance in discharge pipe (e.g. clean filter if necessary)
•
use larger impeller (note available motor power)
2.
Back-pressure too low, discharge too low
•
throttle discharge valve
Pa 100/3-en
18
