6.1.2Abnormal State of Magnetic Bearing
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 falls on the touch down bearing.
Simultaneously, the emergency vent. valve is opened to introduce gases and the STP pump stops, and the "EMERGENCY OPERATION" lamp lights.
CAUTION 
◇When an abnormality/error occurs in the magnetic bearing, check the STP pump as well as the STP control unit, and contact Seiko Seiki.
6.1.3Excessive Vibration
When serious vibration or mechanical shock causes the rotor to touch the touch down bearing (due to external vibration/impact, intrusion of atmosphere or foreign materials into the STP pump or rotor imbalance), the emergency vent. valve is opened to introduce gases, the STP pump stops, and the "EMERGENCY OPERATION" lamp lights.
6.1.4Inverter Overload
When the STP pump does not attain the rated speed within about 15 minutes after starting or when the ACCELERATION state remains unchanged during operation for about 15 minutes, the inverter stops and the STP pump continues rotating by inertia.
The "FAILURE" lamp lights.
6.1.5Overheating Inside the STP pump
When the temperature of the motor inside the STP pump exceeds 110 ℃ due to an abnormal baking temperature or overload operation, the STP pump enters the STOP operation.
The "OVER TEMPERATURE" lamp and the "FAILURE" lamp light.
6.1.6Overheating Inside the STP Control Unit
When the temperature inside the STP control unit (at the heat sink) exceeds 90 ℃ due to a failure in the air cooling fan, external heat source, etc., the STP pump enters the STOP operation.
The "FAILURE" lamp lights.
6.1.7Overspeed
When the rotational speed of the STP pump exceeds 37,500 rpm due to a failure in the inverter, the STP pump enters the STOP operation.
The "FAILURE" lamp lights.
