When the magnetic bearing does not function normally due to a breakage of the STP connection
cable, disconnection of connectors or any abnormality/error of the STP control circuit, the rotor lands
on the touch down bearing and stops. The "FAILURE" LED illuminates and the LCD displays error
message "Disturbance *".
8.1.4 Excessive vibration
When serious vibration or mechanical shock causes the rotor to come in contact with the touch down
bearing (due to external vibration/impact, intrusion of atmosphere or foreign matter into the STP pump
or rotor imbalance), the STP pump decelerates and stops.
The "FAILURE" LED illuminates and the LCD displays error message "Disturbance *".
8.1.5 Motor driver overload
When the STP pump does not attain the rated speed within approximately 30 minutes after starting or
when the ACCELERATION state remains unchanged during operation for approximately 30 minutes,
the STP pump decelerates and stops.
The "FAILURE" LED illuminates and the LCD displays error message "Driver Overload".
8.1.6 Overheating inside the STP pump
When the motor inside the STP pump overheats due to an abnormal high temperature or overload
operation, the STP pump decelerates and stops.
The "FAILURE" LED illuminates and the LCD displays error message "Motor Overheat".
8.1.7 Overheating inside the SCU-1601
The temperature in the SCU-1601 increases when the ventilating duct is blocked or the ambient
temperature is high. The LCD displays error message "CAUTION : CNT heat*" when the inside of the
SCU-1601 overheats. In this case, the pump does not stop.
When the SCU-1601 overheats continuously, the STP pump decelerates and stops.
The "FAILURE" LED illuminates and the LCD displays error message "CNT Overheat *".
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