DAB 2 JET 102 M Installationsanweisung Und Wartung Seite 32

FAULTS
DURING OPERATION OF THE
SET THE PUMPS START AND
STOP TOO FREQUENTLY
THE SET DOES NOT SUPPLY
THE REQUIRED
CHARACTERISTICS.
ONE OR MORE PUMPS IN THE
SET, WHEN STOPPED, TURN IN
THE OPPOSITE DIRECTION
THE MOTOR OF A PUMP IN THE
SET IS VIBRATING
WATER HAMMER IN THE
SYSTEM
A PUMP IN THE SET STOPS AND
DOES NOT START AGAIN
ENGLISH
POSSIBLE CAUSES
1. One or more aquaboxes filled with
water.
2. The differentials of the pump control
pressure switches are too small.
1. The set chosen is undersized for the
characteristics of the system.
2. Excessive water consumption for the
flow rate of the well (set above head) or
of the first collection tank (set below
head or above head).
3. Motors turning in inverse direction.
4. One or more pumps clogged.
5. Pipes clogged.
6. Foot valve clogged or blocked (set
above head).
7. Water recycling between the pumps in
the set.
8. Interception valves at suction and
delivery of each pump partly closed.
9. Air infiltrations in the suction pipe of the
set.
1. The respective non return or foot valves
do not close well or are blocked.
2. The respective suction pipe is not
hermetically sealed.
1.
Contacts o the respective remote control
switch worn or faulty.
2.
Pump blocked.
3.
Bearings worn.
4.
Electric wires broken.
1. Water hammer during operation of the
set.
2. Water hammer when turning off the
flow.
1. Motor thermal protection tripped
(only for single-phase motors).
Respective magnetothermal
tripped (for three-phase and single-phase
motors).
2.
Excessive energy consumption
3.
No current is reaching the coil of the
respective remote control switch.
4.
Remote control switch coil interrupted.
5.
The system pressure is not reaching the
respective control pressure switch.
6.
Faulty control pressure switch.
27
1. Empty it and restore preloading of the
aquabox, if insufficient (see paragraph
"Instructions for running the set").
Change the diaphragm in the aquabox or
the aquabox itself, if there is a hole in the
diaphragm.
2. Increase them (see paragraph "Regulating
the set"). Recommended minimum value:
1 bar.
1. Change it, consulting the Technical
Catalogue.
2. Increase the flow rate that can be supplied
by the well or by the first collection tank.
3. Change it, performing the operation
described in point 5.5. of the paragraph
"Starting up".
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 it or change it.
7. Check correct operation of the non return
valves at suction of each pump.
8. Open them completely.
9. Testing under pressure, check the perfect
seal in the couplings, the joins and the
pipes.
1. Check its seal and correct operation.
2. Testing under pressure, check the seal.
1. Change the remote control switch.
2. Free it.
3. Change it.
4. Check and repair them.
1. Check the non return valve of the hot
water distribution mains.
2. Install other aquaboxes or water hammer
deadening devices at the end of the pipe
where the phenomenon occurs.
1. Wait for the motor to cool down.
switch See the
Paragraph 9.8 – point 1 –
2. The pump turns under excessive force,
.
due to dirt, lack of a phase, dry operation,
worn bearings etc... Eliminate the cause.
3. Use an tester to check the electric circuit
as far as the coil itself and repair any
interruption found.
4. Change it.
5. Remove it and clean the connecting
sleeve.
6. Change it.
REMEDIES
Panel Instructions Manual