DAB 1 NKV EN Instructions Pour L'installation Et La Maintenance page 32

THE STOP BUTTON DOES
NOT STOP THE PUMP
THE SET DOES NOT SUPPLY
THE REQUIRED
CHARACTERISTICS.
WHEN STOPPED, ONE OR
MORE PUMPS IN THE SET
TURN IN INVERSE
DIRECTION.
AFTER BEING STOPPED, A
PUMP IN THE SET DOES NOT
START AGAIN.
THE MOTOR OF AN
ELECTROPUMP IN THE SET
IS VIBRATING.
ENGLISH
1. Important water leaks in the system, so the
pressure is not re-established above the
opening pressure of the pressure switch (about
1.5 bar above the closing pressure of the
pressure switch, that is the starting pressure of
the electropump and of the motor pump) .
2. A jumper has been fitted on the terminals for
connecting the float for the priming tank (to be
installed in the event of suction above head)
1. The set chosen is undersized for the
characteristics of the system.
2. Excessive water consumption for the flow rate
that can be supplied by the water supply
source (tank, well, mains, etc.)
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 are blocked.
2. The respective suction pipe is not airtight.
1. Motor protection fuses burnt out.
2. No current is reaching the coil of the
respective remote control switch.
3. Remote control switch coil interrupted.
4. The system pressure is not reaching the
respective control pressure switch.
5. Faulty control pressure switch.
1. A motor protection fuse has burnt out.
2. Fuse holder base slack or faulty.
3. Contacts of the respective remote control
switch worn or faulty.
4. Pump blocked.
5. Bearings worn.
6. Electric wires broken.
1. Check the joins, couplings and pipes.
2. Remove the jumper in the event of suction
below head.
Insert the float for the priming tank in the
event of suction above head.
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
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.
1. Change it.
2. Secure it if slack. Change it if faulty.
3. Change the remote control switch.
4. Free it.
5. Change them.
6. Check and repair them.
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it, performing the operation