10
3. Voltage during operation
If voltage is low, current increases. This can cause the thermal protector to be activated as the
temperature of the stator increases. Low voltage causes pump performance failure. Use the pump
with the voltage within the specified range.
Note: Applicable voltage for this pump is within
±
10
％
of the rated voltage.
4. Thermal protector (Protection Instrument)
When the temperature of the motor coil is near the maximum temperature limit from electrical or
mechanical reasons, motor burn protection function will be activated and stop the motor by cutting off
the electric circuit. Carefully investigate the cause which activated the thermal protector, remove that
factor, and resume the operation.
Note: Make sure to turn off the power before investigating. The thermal protector will
automatically resume.
