1.  Pump does not start No power supply Check power supply.
    Very low voltage Check the input supply wire capacity (size) whether it is adequate for the given load and also check for any loose Connections. Consult Power supplier for low voltage supply.
    Fuse blown up Check for voltage at motor terminal replace fuse. If new fuse also blows out, recheck all electrical wiring
    Capacitor failure Replace capacitor
    Motor protector is open due to over heating Check free rotation of the rotor by rotating the shaft.
Check supply voltage.
Check pump input current.
    Impeller stuck Check and correct it. Cover the foot valve or stainer with a close meshed strainer to avoid foreigh particles entering into the pump.
    Broken circuit in incoming leads Check all circuits and remedy fault.
2. Pump rotates but it does not deliver water Priming is not sufficient Fill water completely and ensure priming plug is tightened well.
    Too many bends & elbows in suction & delivery pipe line Reduce bends & elbows as much as possible.
    Suction Lift too high Install the pump closer to the water level. Suction lift to be within recommended depth.
    Foot valve or inbuilt check value in regenerative monoset self priming pump is not fuctioning. Repair or replace it.
    Wrong direction of rotation Correct the direction of rotation to coincide with direction indicated by the arrow mark on the pump.
    Total head higher than the specified one Reduce the total head or change to a suitable range pump.
    Air being sucked in through the suction pipe line Check the pipe for leakage and correct it.
    Leakage in air cock Tighten the air cock. If necessary replace it.
    Smaller size pipes used Change the pipes to the recommended sizes
    Mechanical seal leaking Change the mechanical seal
    Foot valve or impeller or pipe blocked Clean the pipe, impeller and foot valve
3. Pump requires excessive power or heats and ceases Low voltage Check the supply wire capacity (size) and also check for any loose connections. Contact the power supplier to rectify low voltage.
4. Pump vibrates and noisy Mechanical seal improperly fitted or damaged. Check valve / foot valve malfunctioning. Check seal, correct and replace if required
    Bearing worn out / incorrectly fitted Replace bearing and use recommended quality grease
    Vibration of pipes with support Securely hold pipe lines
    Impeller blocked Clean impeller
    Shaft bend Rectify or replace it
    Check valve / foot valve malfunctioning Rectity or replace
5. Mechanical seal Leaking Mechanical seal Leaking Replace the seal. Cover the foot valve or strainer with a closed mesh strainer
    Dry running Change the seal
    Seal fitted improperly Check seal and refit
    Bearing worn out Replace bearings
6. Pump jam Kept idle for long time Rotate the pump shaft with a screwdriver inserting it in the slotted portion of the shaft, which is provided at cooling fan side of the motor. If this is not enough to solve the problem, unscrew the bold and rinse/clean the pump thoroughly until the pump shaft rotates freely by hand.
Pump should be run for few minutes atleast once in three days.