Troubleshooting - PYD Electrobombas MP Serie Manual De Instalación Y Mantenimiento

INSTRUCTIONS MANUAL AND MAINTENANCE
SERIE MP
ENG

5. TROUBLESHOOTING

PROBLEME
Engine won't start
Flow rate
insuffi cient
The electric pump
stops
suddenly.
Stator winding
The pump works
but does not draw
water
When the power is
cut off, the pump
runs backwards
The pump makes
noise and vibrates
POSSIBLE CAUSES
1. No current.
2. Pump phase has been lost.
3. Voltage overload.
4. Capacitor damaged.
5. Connection error.
6. Damaged motor.
1. Operating pressure too high.
2. Clogged inlet.
3. Impeller wear.
4. Possible air gap in pump casing.
1. Circuit breaker disconnected or fuse blown.
2. Clogged impeller.
3. Stator winding is burnt out.
1. The electric pump runs too long with an
incorrect phase.
2. Winding rotation short-circuit or short-circuit
between phases due to broken mechanical seal.
3. Clogged impeller.
4. Electrical pump starts and stops frequently.
5. Electric pump runs on overload.
1. Suction is blocked.
2. Foot valve or non-return valve is closed.
3. Constriction in the suction pipe.
4. Air in the pump or in the suction line.
1. Suction line constriction.
2. Failure of foot valve or non-return valve.
3. Expired foot valve.
4. Bubble in suction line.
1. Narrowing in the suction pipe.
2. Small or blocked suction line.
3. Air in the pump or in the suction pipe.
4. The ratio between device and pump head is
too low.
5. Wear of mechanical parts.
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SOLUTIONS
1. Check current.
2. Replace fuse.
3. Check voltage.
4. Replace capacitor.
5. Check connection.
6. Repair motor.
Use within the rated pressure range. 2.
2. Clean water inlet.
3. Replace impeller.
4. Purge suction and pipe body.
1. Check circuit breaker and fuse.
2. Check and clean impeller.
3. Rewind and check.
1. Check mains phases.
2. Check winding and replace mechanical seal.
3. Check and clean impeller.
4. Check working range of pump.
5. Check mains voltage.
1. Check and clean the pump suction.
2. Check foot and check valves.
3. Check suction pipe section.
4. Prime pump and suction pipe.
1. Check the suction pipe.
2. Check and repair or replace valves.
3. Check valve.
4. Bleed suction line.
1. Check the suction pipe.
2. Improve or repair the suction pipe.
3. Fill with liquid and remove air.
4. Upgrade the system or select another duty point
according to the pump rating.
5. Repair the pump.
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