Edwards STP-iXL455

STP-iX455/iXL455 Series Instruction Manual
11-2
Troubleshooting
11.1.2 Operation after a Power Recovery
The STP pump continues decelerating, and power failure detection is reset
automatically.
At this time, the "POWER" LED illuminates and the "FAILURE" LED extinguishes.
Also, POWER OUT pins (4)–(16) is closed, and a failure signal is reset between
FAILURE OUT pins (8)–(21) and (9)–(21) of the "X2 REMOTE" connector.
When the START signal is input after a power recovery, the STP pump reaccelerates
even while it is in BRAKE state.
However, the control unit may detect excessive vibration when power is recovered
after the rotor lands on the touch down bearing (see Section 11.3). In this case, the
STP pump once stops and cannot reaccelerate until the RESET operation completed
(see Section 6.5.4).
◇ Re-supply power to the STP pump as soon as possible after a power recovery.
11.2 Abnormal State of Magnetic Bearing (Disturbance)
When the magnetic bearing does not function normally due to disconnection of
connectors or any abnormality/error of the STP pump, the rotor lands on the touch down
bearing and stops.
The "FAILURE" LED (red) flashes, and a failure signal is output from the "X2
REMOTE" connector.
11.3 Excessive Vibration (Disturbance)
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), and the state lasts for a certain period of
time, the STP pump decelerates and stops.
The "FAILURE" LED (red) flashes, and a failure signal is output from the "X2
REMOTE" connector.
◇ When the rotor contacts the touch down bearing, contact noise and rotational
noise of the touch down bearing are generated from the STP pump.
11.4 Motor Driver Overload (DRV Overload)
When the STP pump does not attain the rated speed within approx. 15 minutes after
starting or when the ACCELERATION state remains unchanged during operation for
approx. 15 minutes, the STP pump decelerates and stops.
The "FAILURE" LED (red) flashes, and a failure signal is output from the "X2
REMOTE" connector.