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PROBLEM
The pump does not switch on
Message
Cause
Intervention
LOW LEVEL
Signal of level not present with Entry
Signal of level activated
Verify the presence of water in suction or the functioning
of the level signal
EXT OFF
Put out of service through an external
signal with external Signal Entrance
active
Put back into service via the external signal
None
Breakdown of the pressure sensor
Verify the reading on the display with a reference
manometer, re-programme or substitute the pressure
sensor
PROBLEM
Pump always functioning, even if not required
Message
Cause
Intervention
None
Leaks in the plant greater than 2 l/min
Find the leaks and block them
None
Breakdown or obstruction of the load
sensor
Inspect and clean the load sensor
PROBLEM
The pump stops too soon, even if there is a demand
Message
Cause
Intervention
None
Fault of the flow sensor sensor
Verify the functioning of the flow sensor
PROBLEM
Performance of the pump below that rated
Message
Cause
Intervention
None
Presence of air in the intake manifold
Clean out the intake manifold
None
Pump obstructed or damaged
Inspect the pump and eliminate the problem