
17Caprari S.p.A.
D - M / DS - MS
9 TROUBLESHOOTING
)DXOWV 3UREDEOHFDXVHV 5HPHGLHV
1.1. Turn to the ON position.
1.2. Check that the electrical equipment is in a good
condition.
Check whether the equipment is receiving
power.
1.3. Wait until the correct operative conditions have
EHHQUHVWRUHGRUFKHFNWKHHI¿FLHQF\RIWKH
automatic devices.
2.1. Check that the electrical equipment is in a good
condition.
Check the power supply voltage rating.
2.2. Check the unbalance as described in the
“Electrical connections and information”
chapter.
If necessary, send the electric pump to an
authorized after- sales service center.
2.3. Invert two of the three phases.
2.4. Compare the setting amperage value with the
one on the electric pump data plate.
2.5. Change the electric pump or change the power
supply.
2.6. Check the hydraulics according to the
procedure described in the “Maintenance”
paragraph.
Immerse the electric pump in lukewarm water if
it is blocked by ice.
If necessary, send the electric pump to an
authorized after- sales service center.
2.7. Check whether the right electric pump has
been chosen.
2.8. Check that the relay is the compensated
ambient temperature type.
Protect the electric control panel from the sun
and heat.
2.9. Remove the incrustations from the cooling
surfaces of the motor.
Check whether the right electric pump has
been chosen since:
WKHWHPSHUDWXUHRIWKHÀXLGPD\EHH[FHVVLYH
- the liquid may be at a persistently low level
DQGIDLOWRFRYHUWKHPRWRUZLWKWKHH[FHSWLRQ
of series D...R).
2.10. Check according to the procedure described
in the “Maintenance” chapter.
If necessary, send the electric pump to an
authorized after- sales service center.
3.1. Check whether the right electric pump has
been selected.
Also consult 4.3. - 4.5. - 4.6.
3.2. See 1.3.
4.1. Increase the level of liquid around the suction
mouth.
4.2. Invert two of the three phases.
4.3. Inspect the electric pump hydraulics
according to the procedure described in the
“Maintenance” paragraph.
&OHDQWKHVWUDLQHUKHDGJUDWLQJYHUVLRQ''6
only).
3XPSFOHDUZDWHUWRÀXVK
Also consult 4.3.
3XPSFOHDUZDWHUWKURXJKWKHGXFWWRÀXVKRU
demount it if necessary.
4.6. Open the sluice valve.
5.1. See 4.1.
5.2. See 4.3.
5.3. See 4.5.
5.4. Open the sluice valve.
6.1. See 4.1.
6.2. See 4.3.
6.3. Check whether the right electric pump has
been chosen.
1. The electric pump fails to
start.
2. The overload relay
or internal thermic-
amperometric protection
(single-phase version
only) has activated
during operation.
3. The electric pump fails to
stop automatically.
4. The electric pump
GHOLYHUVDYHU\SRRUÀRZ
rate.
5. Although it operates, the
HOHFWULFSXPSDEVROXWHO\
fails to deliver water.
6. The electric pump is
QRLV\DQGYLEUDWHV
1.1. The selector switch is set to the OFF position.
1.2. The motor is not powered.
7KHDXWRPDWLFPRQLWRULQJGHYLFHVOHYHO
switch, internal thermic-amperometric
protection, etc.) are not enabling operation.
2.1. All motor phases are not being fully powered
WKUHHSKDVHYHUVLRQRQO\
2.2. Power draw is unbalanced amongst the
SKDVHVWKUHHSKDVHYHUVLRQRQO\
2.3. The motor turns in the wrong direction
WKUHHSKDVHYHUVLRQRQO\
2.4. Wrong overload relay setting.
2.5. The power supply voltage rating fails to
correspond with that of the electric pump.
2.6. The electric pump fails to turn freely since
there are points that rub.
3XPSHGÀXLGH[FHVVLYHO\YLVFLRXVDQGRU
dense.
2.8. High temperature in the electric panel.
(OHFWULFPRWRUWHPSHUDWXUHH[FHVVLYH
2.10. Damaged motor windings owing to the
presence of liquid.
,QVXI¿FLHQWÀRZUDWHRIWKHHOHFWULFSXPS
7KHDXWRPDWLFPRQLWRULQJGHYLFHVOHYHO
switch, etc.) fail to enable the pump to stop.
4.1. Air enters through the suction mouth.
4.2. The motor turns in the wrong direction
WKUHHSKDVHYHUVLRQRQO\
4.3. Worn electric pump.
4.4. Electric pump partially clogged.
4.5. Delivery duct or valve partially clogged.
4.6. Sluice valve partially closed.
(OHFWULFSXPSXQSULPHGRZLQJWRLQVXI¿FLHQW
ÀXLGOHYHO
(OHFWULFSXPSH[FHVVLYHO\ZRUQRUFORJJHG
hydraulics.
5.3. Delivery cock or valve clogged.
5.4. Sluice valve closed.
6.1. Plant installed incorrectly.
+\GUDXOLFVH[FHVVLYHO\ZRUQ
/LTXLGFRQWDLQVDQH[FHVVLYHDPRXQWRIVROLGV
SALES NETWORK and LIST OF ASSISTANCE CENTERS available in www.caprari.com
GB