DAB FX RANGE Instrucciones De Instalación Y Mantenimiento página 24

PROBLEMS
Electric pump starting with
thermal protection intervention
Electric pump drawing more
power than value shown on ID
plate.
Performance too low, the pump
does not perform as required.
ENGLISH
PROBABLE CAUSES
1. Power voltage differs from that stated on ID
plate.
2. Three-phase motor. Phase interruption.
3. Three-phase motor. Relay calibrated at too
low a value.
4. Thermal overload relay faulty
5. Impeller jammed.
6. Incorrect direction of rotation
7. Pumped liquid too dense.
8. Electrical pump dry-running.
9. Operation point outside working range.
10. Electric pump not working.
1. Power voltage differs from that stated on ID
plate.
2. Three-phase motor. Phase interruption.
3. Incorrect sense of rotation.
4. Impeller jammed.
5. Pumped liquid too dense.
6. Operation point outside working range.
7. Electric pump not working.
1. Incorrect direction of rotation
2. Operation point outside working range.
3. Liquid pumped with air or gas present.
4. Pumped liquid too dense.
5. Pump not primed, air inside pumping body
6. Electric pump not working.
1. Check motor input voltage. If necessary
contact electricity provider.
2. Restore motor power connections, then check
for proper current absorption.
3. Adjust relay calibration, set it to a value slightly
higher than that shown on the motor ID plate.
4. Replace the faulty relay, check the system is
working properly.
5. Remove obstruction, wash and clean: if
necessary contact the DAB Assistance Service.
6. Reverse direction of rotation (see 7.2:
"Direction of Rotation")
7. Dilute the liquid. Check the pumped liquid is
suitable (see "Technical Characteristics").
8. Check the level of liquid in the tank and the
level control instruments.
9. Check electric pump operation point, check
delivery pipe characteristics and components. If
necessary contact the DAB Assistance Service.
10. Contact the DAB Assistance Service.
1. Check motor input voltage. If necessary
contact electricity provider.
2. Restore motor power connections, then check
for proper current absorption.
3. Reverse direction of rotation (see 7.2:
"Direction of Rotation")
4. Remove obstruction, wash and clean: if
necessary contact the DAB Assistance Service.
5. Dilute the liquid. Check the pumped liquid is
suitable (see "Technical Characteristics").
6. Check electric pump operation point, check
delivery pipe characteristics and components. If
necessary contact the DAB Assistance Service.
7. Contact the DAB Assistance Service.
1. Reverse direction of rotation (see 7.2:
"Direction of Rotation"")
2. Check electric pump operation point, check
delivery pipe characteristics and components. If
necessary contact the DAB Assistance Service.
3. Increase collection tank size. Install de-
gassing devices.
4. Dilute the liquid. Check the pumped liquid is
suitable (see "Technical Characteristics").
5. Check pump priming (see "priming plug")
6. Contact the DAB Assistance Service.
18
REMEDIES