Symptoms | Cause Analysis | Method of exclusion |
No water after starting | Impeller stuck 2. The supply voltage is too low 3. Power outage or phase failure 4. Cable break 5 plug is damaged 6. Cable pressure drop is too large 7. Stator winding damage; serious resistance imbalance; one phase or two phase circuit; to ground insulation resistance is zero | 1.       Clear debris, and then use the hand wheel impeller to see if it can rotate. If you find that the impeller end face rubbing with the mouth ring, you need to use the pad to lower the impeller pad higher. 2.       Use high-lift pump, or reduce the pump head 3.       Step by step check the power fuse and switch part, find and eliminate the fault; check the three-phase temperature relay contacts are connected and make it work 4.       Find the breakpoint and connect the cable 5.       Replace or repair the plug 6.       According to the length of the cable, use the appropriate cable specifications, increase the conductive area of ​​the cable to reduce the cable voltage drop 7.       Re-off the stator windings for overhaul, the best design data according to the original rewound |
The amount of water is too small | 1. The head is too high 2. The filter is clogged Impeller circulation part of the blockage Impeller steering wrong Impeller or mouth ring wear Submersible pump depth of diving is not enough 7. The power supply voltage is too low | 1. Â Â Â Â Â Â According to the actual needs of the head height, select the pump model, or reduce the head height 2. Â Â Â Â Â Â Remove water pump grass and other debris outside the grid 3. Â Â Â Â Â Â Open the pump part of the pump, remove debris 4. Â Â Â Â Â Â Replace the power cord of any two non-ground wire connection 5. Â Â Â Â Â Â Replace the impeller or spigot 6. Â Â Â Â Â Â Dive deeper into the submersible pump 7. Â Â Â Â Â Â Reduce head |
Electric pump suddenly does not turn | 1. The reasons for the protection switch trip or fuse blowing may be as follows: (1) Centrifugal pumps, the use of the lift is too low; axial pump for use in the lift is too high (2) the pump voltage is low, so that the operating current of the pump more than the rated current (3) electric pump two-phase operation (4) pump reverse operation (5) Increasing the density of the delivered liquid causes the current to increase (6) pump mechanical failure | 1. Identify the specific reasons for the protection switch tripped or blown fuse, and then the right medicine, to be adjusted and excluded |
Power off or phase failure 3. Pump outlet box into the water, the connection line is blown | 2. Turn on the wire 3. Open the cable box, pick up the broken insulation tape on the package to eliminate the cause of leakage outlet box, assembled as it is | |
4. Stator winding burn out | 4. Override the stator windings offline. In addition to timely replacement or inspection stator winding, but also according to the specific circumstances to eliminate the root cause of the malfunction | |
Stator windings burn out | 1. Ground wire wrongly connected to the power cord 2. Disconnection work. At this point the current much larger than the rated value, the winding temperature rise is high, a long time will cause insulation aging damage to the stator windings 3. Mechanical seal damage and leakage, reduce the stator winding insulation resistance damage to the winding 4. impeller stuck, the pump is in three-phase brake state, this time the current is about six times the rated current, if there is no switch protection, burn out the winding soon 5. The end of the stator winding pump shell, and on the ground breakdown 6. Electric pump open, stop too often 7. Submersible pump dehydration running time is too long | 1. Correctly connect the ground wire of the electric pump cable to the ground wire or temporary ground wire of the power grid 2. Identify the cause of the problem, connect the power cable disconnected, or replace the cable 3. Often check the submersible pump insulation resistance situation, the insulation resistance drops, take timely measures to repair 4. Take measures to prevent debris into the pump stuck impeller, pay attention to check the pump mechanical damage, to avoid impeller due to some mechanical damage and stuck. At the same time, once found in the course of the pump suddenly water does not shut down immediately check, take appropriate measures overhaul 5 re-wire winding as far as possible to deal with the two ends, while removing the upper and lower cover the inner surface of the iron pimples, assembly to avoid the end of the shell hit the shell 6. Do not open and close the pump too often, to avoid overloading the pump or bear unnecessary impact load, if necessary, restart the pump should be in the pipeline after the end of the water back to start 7. Operation should pay close attention to the decline of the water level, can not make the pump for a long time in the air to run, to avoid the lack of cooling and lubricating pump conditions |
Symptoms
Cause Analysis
Method of exclusion
No water after starting
Impeller stuck
2. The supply voltage is too low
3. Power outage or phase failure
4. Cable break
5 plug is damaged
6. Cable pressure drop is too large
7. Stator winding damage; serious resistance imbalance; one phase or two phase circuit; to ground insulation resistance is zero
1. Â Â Â Â Â Â Clear debris, and then use the hand wheel impeller to see if it can rotate. If you find that the impeller end face rubbing with the mouth ring, you need to use the pad to lower the impeller pad higher.
2. Â Â Â Â Â Â Use high-lift pump, or reduce the pump head
3. Â Â Â Â Â Â Step by step check the power fuse and switch part, find and eliminate the fault; check the three-phase temperature relay contacts are connected and make it work
4. Â Â Â Â Â Â Find the breakpoint and connect the cable
5. Â Â Â Â Â Â Replace or repair the plug
6.       According to the length of the cable, use the appropriate cable specifications, increase the conductive area of ​​the cable to reduce the cable voltage drop
7. Â Â Â Â Â Â Re-off the stator windings for overhaul, the best design data according to the original rewound
The amount of water is too small
1. The head is too high
2. The filter is clogged
Impeller circulation part of the blockage
Impeller steering wrong
Impeller or mouth ring wear
Submersible pump depth of diving is not enough
7. The power supply voltage is too low
1. Â Â Â Â Â Â According to the actual needs of the head height, select the pump model, or reduce the head height
2. Â Â Â Â Â Â Remove water pump grass and other debris outside the grid
3. Â Â Â Â Â Â Open the pump part of the pump, remove debris
4. Â Â Â Â Â Â Replace the power cord of any two non-ground wire connection
5. Â Â Â Â Â Â Replace the impeller or spigot
6. Â Â Â Â Â Â Dive deeper into the submersible pump
7. Â Â Â Â Â Â Reduce head
Electric pump suddenly does not turn
1. The reasons for the protection switch trip or fuse blowing may be as follows:
(1) Centrifugal pumps, the use of the lift is too low; axial pump for use in the lift is too high
(2) the pump voltage is low, so that the operating current of the pump more than the rated current
(3) electric pump two-phase operation
(4) pump reverse operation
(5) Increasing the density of the delivered liquid causes the current to increase
(6) pump mechanical failure
1. Identify the specific reasons for the protection switch tripped or blown fuse, and then the right medicine, to be adjusted and excluded
Power off or phase failure
3. Pump outlet box into the water, the connection line is blown
2. Turn on the wire
3. Open the cable box, pick up the broken insulation tape on the package to eliminate the cause of leakage outlet box, assembled as it is
4. Stator winding burn out
4. Override the stator windings offline. In addition to timely replacement or inspection stator winding, but also according to the specific circumstances to eliminate the root cause of the malfunction
Stator windings burn out
1. Ground wire wrongly connected to the power cord
2. Disconnection work. At this point the current much larger than the rated value, the winding temperature rise is high, a long time will cause insulation aging damage to the stator windings
3. Mechanical seal damage and leakage, reduce the stator winding insulation resistance damage to the winding
4. impeller stuck, the pump is in three-phase braking state, this time the current is about six times the rated current, if no switch protection, burn the winding soon
5. The end of the stator winding pump shell, and on the ground breakdown
6. Electric pump open, stop too often
7. Submersible pump dehydration running time is too long
1. Correctly connect the ground wire of the electric pump cable to the ground wire or temporary ground wire of the power grid
2. Identify the cause of the problem, connect the power cable disconnected, or replace the cable
3. Often check the submersible pump insulation resistance situation, the insulation resistance drops, take timely measures to repair
4. Take measures to prevent debris into the pump stuck impeller, pay attention to check the pump mechanical damage, to avoid impeller due to some mechanical damage and stuck. At the same time, once found in the course of the pump suddenly water does not shut down immediately check, take appropriate measures overhaul
5 re-wire winding as far as possible to deal with the two ends, while removing the upper and lower cover the inner surface of the iron pimples, assembly to avoid the end of the shell hit the shell
6. Do not open and close the pump too often, to avoid overloading the pump or bear unnecessary impact load, if necessary, restart the pump should be in the pipeline after the end of the water back to start
7. Operation should pay close attention to the decline of the water level, can not make the pump for a long time in the air to run, to avoid the lack of cooling and lubricating pump conditions
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