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SERVICE SUPPORT
FAQ
From a customer, I show around a cause,
the measures method thought to be the question sent well.
Operation
Leakage
Abnormal Noise
Overheating
Vibration
Others

Operation

  • Hand turning of coupling is smooth
    <Possible cause> <Countermeasure>
    Failure with motor wiring and electrical equipment
    Contact the construction contractor and check the wiring status and electrical equipment
    Motor failure
    Consider repairing or repurchasing the motor
    Coupling bolts not installed
    After checking the rotation direction with motor, install the coupling bolts and start up the pump
    Reverse rotation of motor
    Remove all coupling bolts and check the rotation direction of the motor itself.
    If rotation direction is opposite, the pump may need to be repaired or parts replaced.

    Hand turning of coupling is NOT smooth
    <Possible cause> <Countermeasure>
    Rotating parts (impeller,etc.) are in contact with other parts
    Dismantle the suction cover and check pump inside. If any contact is found, contact the supplier or access Honda Pumps Web Site “Contact Us”, to request repair the pump or replace the parts
    Clogging of foreign object
    Dismantle the suction cover and remove foreign object
    Bearing is damaged
    Remove the coupling bolts, and rotate the pump and the motor by hand to check for abnormal noise. Contact the supplier or access Honda Pumps Web Site “Contact Us” if the hand turning is not smooth.
    Freezing inside the pump
    Defrost it naturally or warm it up, and check that the inside is completely thawed by hand turning before starting the pump. If the pump is installed in a freezing environment, take the necessary measures on the casing to prevent damage

  • <Possible cause> <Countermeasure>
    Not priming or Insufficient priming
    Stop the pump, then start up pump again after water priming sufficiently.
    Insufficient air release
    Fully release the air in the piping and start up the pump again.
    Failure with motor wiring and electrical equipment
    Contact the construction contractor and check the wiring status and electrical equipment
    Air sucking
    Check any air sucking caused by forgetting to tighten the joints on the suction piping side or tightening them unevenly.
    Foreign object inside the suction piping or pump
    Check and remove foreign object
    Reverse rotation of pump
    Before stopping the operation, make sure that the direction of motor rotation is correct. If it is wrong, contact the construction contractor to check the wiring of motor

  • Lack of performance
    <Possible cause> <Countermeasure>
    Foreign object inside the suction piping or pump
    Check the inside of the suction piping (strainer, foot valve, etc.) and remove foreign object
    Fully opened the discharge valve
    Adjust the discharge valve towards the specified operating point
    Low motor rotation speed
    Check for motor overload, frequency, and voltage abnormalities, then keep normal condition.
    Different motor voltage
    1) In case motor voltage 400V for equipment voltage 200V,
    replace the motor with the correct voltage.
    2) In case motor voltage 200V for equipment voltage 400V,
    motor shall be damaged.
    Reverse rotation of pump
    Before stopping the operation, make sure that the direction of motor rotation is correct. If it is wrong, contact the construction contractor to check the wiring of motor
    *In case impeller secure to shaft with threaded, pump repair may be required.
    Pump liquid conditions differ from the order
    Contact the supplier or access Honda Pumps Web Site “Contact Us”, and ask to reselect a suitable pump.

    Excessive performance
    <Possible cause> <Countermeasure>
    Not satisfied the specified flow rate
    Adjust the discharge valve towards the specified operating point. Or check the inside of the suction piping.

    Sudden performance drop
    <Possible cause> <Countermeasure>
    Foreign object inside the suction piping or pump
    Check the inside of the suction piping and the pump, and remove foreign object　if found. If there is no foreign object and the cause is unknown, contact the supplier or access Honda Pumps Web Site “Contact Us”.
    Voltage drop
    Check and inspect the facility.

    Abnormally low current value
    <Possible cause> <Countermeasure>
    Air pocket inside the piping or the casing
    Fully release the air in the suction piping or the casing, and then start up the pump again.
    Almost fully opened the discharge valve
    Adjust the discharge valve towards the specified operating point

  • <Possible cause> <Countermeasure>
    Almost fully opened the discharge valve
    Adjust the discharge valve towards the specified operating point
    Rotating parts (impeller,etc.) are in contact with other parts
    Dismantle the suction cover and check pump inside. If any contact is found, contact the supplier or access Honda Pumps Web Site “Contact Us”, to request repair the pump or replace the parts
    Bearing is damaged
    Measure the vibration. Contact the supplier or access Honda Pumps Web Site “Contact Us”, if it is difficult to determine.

Abnormal Noise

  • <Possible cause> <Countermeasure>
    Possibility of cavitation (boiling phenomenon)
    Check the valve opening, suction height, and vacuum level of the equipment.
    Contact the supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved
    Rotating parts (impeller,etc.) are in contact with other parts
    Dismantle the suction cover and check pump inside. If any contact is found, contact the supplier or access Honda Pumps Web Site “Contact Us”, to request repair the pump or replace the parts
    Clogging of foreign object
    Check the inside of the suction piping and the pump, and remove foreign object　if found. If there is no foreign object and the cause is unknown, contact the supplier or access Honda Pumps Web Site “Contact Us”.

  • <Possible cause> <Countermeasure>
    Insufficient lubrication of mechanical seal
    Stop the pump and check the flow rate and pressure, and then turn the coupling by hand several times. Contact the supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved.

  • Slight noise at 1 meter from the pump
    <Possible cause> <Countermeasure>
    Hand turning of coupling is smooth when the pump is stopped.
    ・Insufficient lubrication or Contamination of dust
    ・Pump running with Insufficient bearing load
    It is no problem if the sound is clear. It may be a temporary noise due to insufficient load on the bearing or contamination of dust. In case noise getting bigger, please contact the supplier or access Honda Pumps Web Site “Contact Us”.

    Big noise at 1 meter from the pump
    <Possible cause> <Countermeasure>
    Hand turning of coupling is not smooth when the pump is stopped.
    ・Scratches on the bearing surface
    ・Damage to bearing balls
    Stop the pump immediately, new bearing replacement necessary.

  • <Countermeasure>
    Stop the pump immediately, and contact the supplier or access Honda Pumps Web Site “Contact Us”.

Vibration

  • <Possible cause> <Countermeasure>
    Excessive pump load due to piping load
    Check the piping connections whether any misalignment (generating execessive load) of flange, please consult the construction contractor
    Failure of coupling alignment
    Refer to “Installation” in the instruction manual. Contact the construction contractor/supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved.
    Failure of installation
    Refer to “Installation” in the instruction manual. Contact the construction contractor/supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved.
    Possibility of cavitation (boiling phenomenon)
    Check the valve opening, suction height, and vacuum level of the equipment.
    Contact the supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved.

  • <Possible cause> <Countermeasure>
    Failure of coupling alignment
    Refer to “Installation” in the instruction manual. Contact the construction contractor/supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved.
    Failure of installation
    Refer to “Installation” in the instruction manual. Contact the construction contractor/supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved.

  • <Possible cause> <Countermeasure>
    Failure of coupling alignment
    Refer to “Installation” in the instruction manual. Contact the construction contractor/supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved.
    Failure of installation
    Refer to “Installation” in the instruction manual. Contact the construction contractor/supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved.
    Support of piping on equipment side is insufficient
    Contact the construction contractor/supplier or access Honda Pumps Web Site “Contact Us”

Leakage

  • Leaked soon after the starting operation
    <Possible cause> <Countermeasure>
    Failure or malfunction of the mechanical seal
    Stop the pump and check the leaking condition by hand turning. Contact the supplier or access Honda Pumps Web Site “Contact Us”, if the leakage is not stopped.
    Difference in pumping liquid
    Check whether there are any change to the liquid specifications from the order.　If the liquid specifications have been changed, the mechanical seal design shall be reselected.

    Leaked more than one year after the starting operation
    <Possible cause> <Countermeasure>
    Leakage due to wear of parts
    If the pump has been operated more than one year, maintenance recommended. Contact the supplier or access Honda Pumps Web Site “Contact Us”.

  • Leaked heavily (scattering)
    <Possible cause> <Countermeasure>
    Insufficient adjustment of leakage amount
    Tighten the adjusting nut slowly and evenly to adjust the appropriate amount of leakage. Refer to “Operation and Start-up” in the instruction manual
    Wear of the gland packing
    If the pump has been operated more than one year, maintenance recommended. Contact the supplier or access Honda Pumps Web Site “Contact Us”.

    No leakage (Smoked and heated)
    <Possible cause> <Countermeasure>
    Too much tightening of the gland packing
    Untighten the adjusting nut and adjust to the proper amount. Refer to “Operation and Start-up” in the instruction manual. Contact the supplier or access Honda Pumps Web Site “Contact Us”, if the leakage amount cannnot be adjusted.

  • <Possible cause> <Countermeasure>
    Abnormality of the sealing part of the bearing case (leakage of lube oil)
    If the pump is operated as is for a long period of time, it may malfunction. Stop the pump immediately, and contact the supplier or access Honda Pumps Web Site “Contact Us”.

  • <Possible cause> <Countermeasure>
    Abnormality of the casing and the suction cover(Corrosion, Erosion, etc.)
    If the pumping liquid leaks from the defective part, take first aid measures using a special putty or others. And contact the supplier or access Honda Pumps Web Site “Contact Us” for repair or replacement.

  • <Possible cause> <Countermeasure>
    Sudden change of liquid temperature
    The mounting bolts of the pressure part may stretch and loosen due to thermal expansion. After the liquid temperature rises, retighten the bolts (hot bolting). Refer to “Operation and Start-up” in the instruction manual.
    Malfunction of the gasket or O-ring
    Contact the supplier or access Honda Pumps Web Site “Contact Us”.

  • <Possible cause> <Countermeasure>
    Liquefaction of grease
    It can be continued the operation. If it observed an abnormal noise, contact the supplier or access Honda Pumps Web Site “Contact Us”.

  • <Possible cause> <Countermeasure>
    Defective or deteriorated the gasket or O-ring
    Replace the gland packing with a new one.
    Uneven tightening of the bolt/nut
    Stop the pump, loosen the bolts/nuts of jointed part, and then retighten them evenly.

Overheating

  • <Possible cause> <Countermeasure>
    Rotating parts (impeller,etc.) are in contact with other parts
    Dismantle the suction cover and check pump inside. If any contact is found, contact the supplier or access Honda Pumps Web Site “Contact Us”, to request repair the pump or replace the parts
    The flow rate is too high or too low
    Cavitation (boiling phenomenon) may occur.
    Adjust the discharge valve towards the specified operating point.
    The discharge side is in a shutoff condition.
    Shut-off operation may result in pump damage.
    Adjust the discharge valve towards the appropriate flow rate/pressure.

  • Overheating of the gland packing
    <Possible cause> <Countermeasure>
    Over tightening of the gland packing
    Untighten the adjusting nut and adjust to the proper amount. Refer to “Operation and Start-up” in the instruction manual. Contact the supplier or access Honda Pumps Web Site “Contact Us”, if the leakage amount cannnot be adjusted.
    Insufficient of the flushing water pressure
    Refer to the “Utility List” submitted by the supplier and adjust the pressure/amount of flushing water to proper level.
    Insufficient leakage amount
    Adjust the leakage to the appropriate amount.

    Overheating of the mechanical seal
    <Possible cause> <Countermeasure>
    Dry running (The sealing face does not be filmed by sufficient liquid)
    Vent the air sufficiently.
    Make sure that air is not sucking into the pump during operation.(Dry running may cause the seal damage).
    Insufficient of the flushing water pressure/flow
    Refer to the “Utility List” submitted by the supplier and adjust the pressure/amount of flushing water to an appropriate level.

  • Heavy vibration
    <Possible cause> <Countermeasure>
    Deterioration of the lube oil, Contamination of water, etc into the lube oil
    Replace the lube oil.(Recommended interval : 500 hours after starting operation and every 6 months thereafter)
    Installation failure
    Refer to “Installation” in the instruction manual.
    Contact the construction contractor/supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved
    High force by suction and/or discharge piping
    Check the piping connections. If there is any misalignment (generating execessive load), please consult the construction contractor
    Alignment failure
    Refer to “Installation” in the instruction manual.
    Contact the construction contractor/supplier or access Honda Pumps Web Site “Contact Us”, if the situation is not improved

    Non heavy vibration
    <Possible cause> <Countermeasure>
    Insufficient amount of lube oil or Improper amount of low quality grease
    Replace the lube oil.
    (Recommended interval : 500 hours after starting operation and every 6 months thereafter)
    For replacement of the grease, contact the supplier or access Honda Pumps Web Site “Contact Us”.

  • Too much load on the motor
    <Possible cause> <Countermeasure>
    Rotating parts (impeller,etc.) are in contact with other parts
    Dismantle the suction cover and check pump inside. If any contact is found, contact the supplier or access Honda Pumps Web Site “Contact Us”, to request repair the pump or replace the parts
    The flow rate is too high
    Cavitation (boiling phenomenon) may occur.
    Adjust the discharge valve towards the specified operating point.

    <Possible cause> <Countermeasure>
    Voltage dropped
    Check and inspect the facility.

Others

  • <Countermeasure>
    Contact the supplier or access Honda Pumps Web Site “Contact Us”.

  • <Countermeasure>
    Access Honda Pumps Web Site “Contact Us”.

  • <Countermeasure>
    Access Honda Pumps Web Site “Contact Us”.

  • <Possible cause> <Countermeasure>
    Motor Rotation Speed: More than 2900 (2 Pole)
    TYPE: ISO VG32 TURBIN OIL
    Motor Rotation Speed: Less than 1750 (4,6,8 Pole)
    TYPE: ISO VG46 TURBIN OIL
    Model HRG, HRO (Liquid Temp. less than 80℃), Model GLNS (Over 2 Pole)
    TYPE: ISO VG32 TURBIN OIL
    Model HRG, HRO (Liquid Temp. more than 80℃)
    TYPE: ISO VG68
    Model ROH
    TYPE: ISO VG68

    <Countermeasure>
    Oil Amount
    Max : Upper edge of red circle in Oil Gauge
    Min : Lower edge of red circle in Oil Gauge