Nakayama PRO NP2120, Руководство пользователя

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5
Problem Causes Solution
The pump fails to
operate or the pump
stops suddenly
during operation.
1. Power supply interruption/access failure
of external power supply.
2. The power line or plug is defective.
3. The mechanical seal is sucked.
4. Due to the pressure in the pipeline, the pressure switch
shuts off the circuit.
5. The installation height of faucet has exceeded the
pressure value of pressure switch.
6. Other faults.
1. Check the fuse device and electrical connection and switch on the
external power supply.
2. Ask a professional electrician to make an inspection.
3. Considering that the mechanical seal will suffer form resistance when it
is idle for long period, please switch off the pump and pull out the power
plug.
4. Please open the faucet, at this moment, the pressure switch will power
on automatically after depressurization.
5. When necessary, please adjust the pressure setup value of pressure
switch.
6. Please ask the maintenance department to make inspection.
Insufficient flow
rate/flow rate
absence (or self
absorption failure).
1. Dirty water or grainy wastewater will reduce the suction
capacity of the pump.
2. Hose/pipeline/filter screen blockage.
3. The hose/pipeline system is damaged.
4. The water inlet is excessively soft, as a result, the water
inlet fails to draw water due to the suction flattening
during the pump operation.
5. Due to the air in the pump head, the pump fails to be
completely filled with water.
6. Please immerse the water inlet in water for at least 10
cm.
7. The joint of suction pipeline is not tight enough.
1. Please clean up the filter screen and replace the damaged spare parts
(such as, the worn impeller and so on).
2. Dredge the pipeline/clean up the filter screen.
3. Replace the pipeline.
4. Please replace the threaded reinforcing antivacuum hose or pressure-
proof hard tube.
5. Please fill the pump head up with water.
6. Please check whether the water source is enough, then, immerse the
water inlet in water for more than 10 cm.
7. Please replace the joint sealing element and completely seal the joint.
Pressure switch can't
be turned off.
1.Foreign matter got stuck in electronic pressure switch
spool.
1. Remove the foreign matter. It is strongly recommended to install
filtering device at the inlet side.
The pump turns off
after a short period
of time.
1. The pipeline or pump suffer from abnormal obstruction
and the thermal circuit breaker has cut off the electrical
circuit.
2. Due to the excessively high environment or water
temperature, the thermal circuit breaker has cut off the
electrical circuit.
3. Due to the pressure in the pipeline, the pressure switch
shall shut off the power.
4. An obstruction has damaged the impeller.
1. Please remove the obstructing material, then, power on and draw
water after the pump has cooled down completely.
2. Please ensure that the water and environment temperature is less than
35°C
, then power on, and draw water.
3. Please open the faucet, at this moment, the pressure switch will start
automatically after deprussurization.
4. Please ask the maintenance department to make inspection.
The pump is started
frequently.
1. Pipeline or joint leakage.
2. The suction culvert fails to be installed with check valve.
3. The air pressure value in the pressure tank is excessively
low.
4. The inner container of pressure tank is sucked.
1. Check the pipeline and joint and make the correct installation again to
avoid leakage.
2. Install the check valve on the water inlet.
3. Refer to the recommended air pressure tank as specified in the tail of
pressure tank and make air inflation according to the labeling value.
4. The inner container will be sucked when the internal pressure in the
pressure tank is extruded for a long period as long as the pump is idle for
a long time, at this moment, draw water and close the water valve slowly,
as a result, the sucked part will be opened after multiple operations,
followed by normal operation.
ENVIRONMENTAL DISPOSAL
In order to avoid damages on transportation, the tool has to be delivered in solid packaging. Packaging as well as the unit and accessories are made of
recyclable materials and can be disposed accordingly. The tool's plastics components are marked according to their material, which makes it possible to remove
environmental friendly and differentiated because of available collection facilities.
Only for EU countries
Do not dispose of electric tools together with household waste material!
In observance of European Directive 2002/96/EC on waste electrical and electronic equipment and its implementation in accordance with
national law, electric tools that have reached the end of their life must be collected separately and returned to an environmentally compatible
recycling facility.