DAB PUMPS 1 KDN Series Instruction For Installation And Maintenance page 53

1 The set chosen is undersized for the characteristics of the
THE SET DOES NOT
system.
SUPPLY THE
2 Excessive water consumption for the flow rate that can be
REQUIRED
supplied by the water supply source (tank, well, mains, etc.)
CHARACTERISTICS.
3 Motors turning in inverse direction.
4 One or more pumps clogged.
5 Pipes clogged.
6 Foot valves clogged or blocked (set above head).
7 Interception valves at suction and delivery partly closed.
8 Air infiltrations in the suction pipes of the set pumps.
1 The respective not return or foot valves do not close well or
WHEN STOPPED, ONE OR
are blocked.
MORE PUMPS IN THE SET
2 The respective suction pipe is not airtight.
TURN IN INVERSE
DIRECTION.
1 Motor protection fuses burnt out.
AFTER BEING
2 No current is reaching the coil of the respective remote
STOPPED, A PUMP IN
control switch.
THE SET DOES NOT
3 Remote control switch coil interrupted.
START AGAIN.
4 The system pressure is not reaching the respective control
pressure switch.
5 Faulty control pressure switch.
ENGLISH
1 Replace it with one that suits the required characteristics.
2 Increase the flow rate that can be supplied by the water
supply source.
3 Change it, performing the operation described in the
paragraph on "Starting".
4 Dismantle them and clean the pump body and the impellers,
ensuring that they are in good condition.
5 Clean them or change them.
6 Clean them or change them.
7 Open them completely.
8 Testing under pressure, check the perfect seal in the
couplings, the joins and the pipes.
1 Check seal and correct operation.
2 Check the seal, testing under pressure.
1 Change them.
2 Use a tester to check the electric circuit as far as the coil
itself and repair any interruption found.
3 Change it.
4 Remove it and clean the connecting sleeve.
5 Change it.
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