Troubleshooting - Nakayama PRO NP1070 Manual

EN
SET TOGGLE SWITCH
In this particular pump the float is installed in the form of a switch inside the body of the pump. This can control the starting point of the pump's operation.
Check the following before starting the pump's operation.
• The sensor must be installed in the body of the pump.
• Attention: If the sensor is not installed in the body of the pump there is a risk of dry running which could damage the impeller.
• Ensure that the metal component of the sensor is exposed and clean.
Keep the pump's sensor clean so that it can continuously read the water level.
CONNECTING PRESSURE PIPE
• Screw the pressure pipe onto the pressure connector. All joint connections must be sealed with a threaded sealing stripe.
• When using the hose, screw the right hose adapter into the pressure connector.
• Secure the hose firmly to the hose adapter and secure it with a hose clamp.
• If it is used occasionally, please use a suitable pipe. A rigid pipe with a check valve is recommended for use in a fixed position. This can be done at the close
of the machine to prevent liquid backflow.
Use a strong rope to connect the handle of the pump and dip it into the liquid to be conveyed at a certain angle, so that the lower side of the device has no
bubble formation to prevent the bubbles from being sucked in.
Put the equipment down slowly, and once the pump is submerged, it can be adjusted again.
The pump is arranged at the bottom of a liquid container.
Fasten the end of the rope after lowering so that the pump can also be handled when hanging on the rope.
The pump can work after the device is connected to the main power source.

TROUBLESHOOTING

In most cases, you will be able to troubleshoot problems easily by yourself. Before you contact us, please refer to the following table for technical support. This
will help you save a lot of work and possible expenses.
Problem
The pump
cannot
start.
No water.
The pump
cannot
close.
Flow rate is
too low.
The pump
stops
working
after a short
period of
time.
3
Risk of equipment damage.
Do not lift the pump by cable or pressure hose, because these cables
or pressure hoses are not designed for tensile strength from pump
Attention!
weight.
For rope handling, do not operate the pump without the pressure
hose to prevent the pump from twisting around its longitudinal axis.
In continuous use of a pump with a rope, the condition of the rope
Attention! must be checked periodically, as it may break with increasing use
time.
The pump is not designed to transport corrosive substances,
flammable and explosive substances such as gasoline, petroleum,
nitro diluent, grease, oil, brine and toilet equipment sewage, as well
as low mobility mud sewage. The temperature of the liquid cannot
Attention!
exceed 35°C.
Causes
1. Unconnected power.
2. Sensors are not exposed to water.
3. Sensor metal contact is blocked by dirt.
1. Inlet obstruction.
2. The pressure hose is bent.
1. The sensor is conducted by conductive dirt. 1. Clean the sensor.
1. Inlet obstruction.
2. Debris and particles cause the wear of a
critical part of the pump which reduces the
flow of the pump.
1. If the water is too dirty, the pump may stall,
and the heat protector will cut off the water
pump motor power supply.
2. If the water temperature is too high, the
heat protector will cut off the water pump
motor power supply.
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Solution
1. Check power supply.
2. Place the sensors in water.
3. Clean the sensor.
1. Clean the inlet.
2. Adjust the hose.
1. Clean the inlet.
2. Clean the pump and replace
worn parts.
1. Disconnect the main power
supply and clean the water
pump.
2. Ensure that the maximum
water temperature does not
exceed 35°C.