7.3.4 Pump Overload
"Pump Overload" is detected when the motor current exceeds the setting value until a certain period
of time or the STP pump rotational speed drops below the set value until a certain period of time. The
motor current and the rotational speed are monitored only in the NORMAL state.
When a way of use that depositions accumulate in the STP pump, the load may gradually grow in the
NORMAL state with the operating time. This "WARNING" function can be used when considering the
overhaul timing.
The electric current setting value and rotational speed setting value are user-definable. "Pump
Overload" warning can be released by setting the warning function to disable after it is detected.
The setting can be changed using serial communication, the STP-Link (optional accessory) or the
display unit iDT-002 (optional accessory).
7.3.5 Imbalance
The STP pump continuously monitors its rotor balance. The "Imbalance" is detected when an
imbalance of the synchronized rotor with the rotational speed exceeds the setting value.
When a way of use that depositions accumulate in the STP pump, the rotor balance is lost, and an
imbalance increases gradually with the STP pump operation hours. An increase in the amount of
deposition may lead to a malfunction of the STP pump. Overhaul the pump as soon as possible.
The setting value of the imbalance is fixed, and the user cannot set it.
After detecting the "Imbalance X_H", "Imbalance X_B" or "Imbalance Z", it can be released by setting
the "WARNING" function to disable. The setting can be changed via serial communication, the STP-
Link (optional accessory) or the display unit iDT-002 (optional accessory).
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