DAB JET Série Mode D'emploi page 32

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
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. Phase missing (only in three-phase).
1. Water hammer during operation of the
set.
2. Water hammer when turning off the flow.
1. Tripping of the internal motor protection
(only for single-phase pumps).
Tripping of the motor protection (only for
single-phase and three-phase pumps).
2. Excessive energy consumption.
3. No current is reaching the coil of the
respective remote control switch.
4. Remote control switch coil interrupted.
5. Pressure switches
transmitter faulty or clogged.
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 the motor power supply.
1. Check the non return valve of the hot water
distribution mains.
2. Install more expansion vessels or water
hammer dampers in the pipe concerned.
1. Wait for the motor to cool down.
See the instructions booklet for the E-BOX
Electric Panel.
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.
or pressure 5. Clean them or change them.
30