Pump Does Not Start | ||
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Sr. No. | Cause | Suggested Remedy |
1. | Starting panel defective. | Replace it by new starter and check for continuity. Set relay properly |
2. | Overload protection out. | Replace it with correct rating |
3. | Fuse blown off. | Use adequate size cable. |
4. | Low line voltage | Wait until the voltage recovers or contact electricity board people. |
Fuse Blow Off Or Circuit Breaker Trips When Motor Is Started | ||
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Sr. No. | Cause | Suggested Remedy |
1. | Defective control panel. Defective wiring. Incorrect fuse component. | Repair/ Replace as per instruction |
2. | Defective relay. | Replace and reset the starter only for checking the current drawn. Make sure that abnormal current is not drawn. |
3. | Damaged motor winding or cable. | Rewind motor / Replace cable. |
4. | Pump locked due to sand. | Remove, dismantle and clean water passages inside the pump and reassemble. |
5. | Pump set might have blocked in crossed well. | Move the unit and put straight and then start. Otherwise shaft would bend. |
6. | Pump and motor not coupled properly. | Check and realign coupling and see the freeness. |
Pump Does Not Deliver Any Water | ||
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Sr. No. | Cause | Suggested Remedy |
1. | Water level in borewell may have gone below level of pump. | If possible lower the unit further. Stop the unit until water level rises sufficiently. Operate the pump set with throttle valve. |
2. | Total head of the system is higher than designed head of pump set | Replace it with suitable pump set for higher head. Ensure that flow is not obstructed due to foreign bodies in valve or inferior quality of valve. |
3. | N.R.V sand blocked / wrongly connected N.R.V on delivery pipe | Check the flow direction arrow on the N.R.V body and connect correctly. Check for sand blockage. Clean and Replace. |
4. | Motor does not start. | Check cable connection. Check for correctness of incoming power supply. Check for backup protection. |
5. | Motor starts but doesn’t pickup the rated speed. | Check voltage / frequency. Replace cable with higher size if necessary. |
Pump Operates But Delivers Less Water | ||
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Sr. No. | Cause | Suggested Remedy |
1. | Motor running lower than the rated speed. | Check voltage/ frequency. Replace cable with higher size if necessary. |
2. | Strainer / Impeller / Stage Casing may be clogged. | Dismantle the pump and clean strainer and water passage of impeller and stage casing. If necessary replace them. |
3. | Defective rising main delivery pipe (leakage) | Check the piping joints for leakage / chock. |
4. | System, resistance of the pump set is higher than estimated | Replace pipes with higher size. Replace the pump set with higher capacity. |
5. | Yield of the bore is not sufficient. | Lower the unit further if possible or throttle the sluice valve adjusting to suitable flow rate. |
6. | Damaged pump parts. | Replace correct components e.g. Impeller / Diffuser / Bushes / Sleeves, Neckring etc. Check slit / sand content of . water to avoid premature wear. |
Fuse Blows When Motor Is Running | ||
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Sr. No. | Cause | Suggested Remedy |
1. | Incorrect voltage or inadequate power supply. | Stabilize the voltage to rated & wait for adequate power supply. |
2. | Overheated Overload Protection box. | Overload relay to be replaced or adjusted to a higher value. Replace starter if trips repetitively. |
3. | Defective control panel components. | Defective electrical components to be replaced. |
4. | Damaged motor cable or winding. | Check continuity in cable and wiring. Replace the cable. Rewind the motor if required. |
5. | Pump becomes sand locked | Remove, dismantle and clean water passages inside the pump. |
Pump set Consumes Excessive Power | ||
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Sr. No. | Cause | Suggested Remedy |
1. | Motor may be running at a speed higher than rated. | Check supply voltage and frequency. |
2. | Pump set runs outside recommended range. | Ensure that pump set is operated nearer to best efficiency point. |
3. | Thrust plate of motor worn out. | Replace / Relap it. |
Fuse Blows When Motor Is Running | ||
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Sr. No. | Cause | Suggested Remedy |
1. | Incorrect voltage or inadequate power supply. | Stabilize the voltage to rated & wait for adequate power supply. |
2. | Overheated Overload Protection box. | Overload relay to be replaced or adjusted to a higher value. Replace starter if trips repetitively. |
3. | Defective control panel components. | Defective electrical components to be replaced. |
4. | Damaged motor cable or winding. | Check continuity in cable and wiring. Replace the cable. Rewind the motor if required. |
5. | Pump becomes sand locked | Remove, dismantle and clean water passages inside the pump. |