Tsurumi PU Submersible Vortex Sewage Pump - Manual (Page 23)

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WARNING To prevent serious accidents, disconnect the power supply before inspecting
the pump.
Read this Operation Manual carefully before requesting repair. After re-inspecting the
pump, if it does not operate normally, contact the dealer where this equipment was pur-
chased, or the Tsurumi sales office in your area.
①Contact the electric power company or an electrical
repair shop.
②Have the cause investigated and repaired by a
specialist.
③Inspect the pump and remove the debris.
④Remove obstacles and check the operation of the
float.
①No proper power is supplied
(i.e. power outage).
②Malfunction in automatic control
(control panel)
③Foreign matter is wedged in the impeller,
causing the motor protector to trip.
④Malfunction in float.
①After resuming operation, switch to operation of
approximately once every 15 minutes (or
approximately once every 30 minutes on a 0.15kW
model).
②Remove obstacles and check the operation of the
stop float.
①The pump has been operating for a long
time while being exposed to air, causing
the motor protector to trip.
②The movement of the stop float is
obstructed, causing the start float alone to
perform the start and stop operations.
①Set it to the proper water level.
②Repair or replace the pump.
①The float switch is not set to the proper
water level.
②One of the pumps is malfunctioning.
①Secure the pipe support.
②Replace the bearings.
③Adjust the valve to the proper opening.
①The pipe support is loose.
②Motor bearings are damaged.
③Valve is tightly closed.
①Remove the blockage. Or, replace the part.
②Set the water level of the (stop) float higher than the
pump's minimum possible operating water level.
①The movement of the floats is obstructed.
The switch in a float is faulty.
②The water level of the (stop) float is set
lower than the pump's minimum possible
operating water level.
①Repair or replace the affected part.
②Re-examine the work plan.
③Check the nameplate and replace the pump or the
impeller.
④Change the power supply connection.
①The impeller or the pump casing is
significantly worn.
②There is a great piping loss.
③A 60Hz pump is used at 50Hz.
④The motor rotates in reverse.
①Stop momentarily and then restart; or, clean the air
release valve.
②Remove the blockage.
③Remove the blockage, or repair or replace the
valve.
④Change the power supply connection.
①An air lock occurred in the pump.
②The pump or the piping is blocked.
③The piping is partially blocked or the valve
is operating improperly.
④The motor rotates in reverse.
①Replace the equipment with the correct
specification or set it to the correct setting.
②Repair or replace.
③Check the nameplate and replace the pump or the
impeller.
①The equipment is not matched to the pump
specifications or the equipment rating is
improperly set.
②Malfunction of motor (seizure or water
leakage).
③A 50Hz unit is used at 60Hz.
Pump fails to start; or, starts
but stops immediately.
Pump starts but stops
after a certain length of
time.
The power supply circuit
breaker trips.
Pump operates but does
not pump water.
The pumping volume is low.
Pump generates vibration
or noise.
The pump does not stop
automatically.
The pumps do not perform
proper alternating operation.
Symptom Cause Countermeasure
Disposal of Product
Properly dispose of the product by disassembling it, presorting the contents, and sending
them to the waste material treatment site.
Remarks
Purchase date
Manufacturing number
Product model
The following information is required when ordering repairs or making other inquiries.
9 TROUBLESHOOTING