Tsurumi PU Submersible Vortex Sewage Pump - Manual (Page 11)

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Motor Protector
The pump is equipped with a built-in motor protector (circle thermal protector).
If a current overload or overheating occurs under the symptoms given below, the pump will
stop automatically to protect the motor regardless of the water level at the time of opera-
tion.
• Extreme fluctuation of power supply voltage
• Pump operated under overload condition
• Pump operated at open phase or binding condition
Note:
After the motor protector has tripped, the motor automatically resumes its operation.
Therefore, make sure to disconnect the cabtyre cable from the terminal board or the power
outlet, and eliminate the cause of the problem.
Do not operate the pump at unusually low head, or with the impeller clogged with debris.
Doing so will not only prevent the pump from attaining its full potential, but may also gen-
erate abnormal noise and vibration and damage the pump.
CAUTION • If it is necessary to extend the cabtyre cable, use a core size equal to
or larger than the original. This is necessary not only for avoiding a
performance drop, but to prevent cable overheating which can result in fire,
electrical leakage or electrical shock.
• If a cable with cut insulation or other damage is submerged in the water,
there is a danger of water seeping into the motor causing a short. This may
result in damage to the product, electrical leakage, electrical shock, or fire.
• Be careful not to let the cabtyre cable be cut or become twisted. This may
result in damage to the product, electrical leakage, electrical shock, or fire.
• If it is necessary to submerse the connection leads of the cabtyre cable
in water, first seal the leads completely in a molded protective sleeve, to
prevent electrical leakage, electrical shock, or fire.
Do not allow the cabtyre cable leads to become wet.
Make sure the cable does not become excessively bent or twisted, and does not rub against
a structure in a way that might damage it.