DAYLIFF DFP, Инструкция по установке и эксплуатации

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5
5. TROUBLE SHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
Rotating the wrong way
Low rotating speed
The pump
does not
pump
Change connections of electric
motor
Pump not primed
Foot valve leaking. Leaks in gaskets
or suction piping. Check and repair
Check the reason for this low speed
(excessive consumption or low
frequency)
Suction head too high
Take the pump closer to the water
level. Change the pump for another
with less NPHSr. Reduce leaks in the
suction piping
Air getting into suction pipe
Test pressure the suction pipeline
including the pump and observe any
liquid leak
Insufficient liquid intake
E x t e n d t h e s u c t i o n p i p e l i n e
increasing the submergence
Foot valve partially blocked
Insufficient
flow
Clean footvalve
Insufficient liquid intake
Submerge the foot valve more/
Reduce the flow
Air pockets in suction line
Change the arrangement of the
pipeline.
Direction changed
Change connections of electric
motor
Internal parts worn Replace the worn parts