Table 33 - States of LCD, LEDs and REMOTE output signals at a power failure
8.1.2 Operation after a power recovery
1. 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 (9)–(28) is closed, and a failure signal is reset between ALARM OUT pins (14)–(33)
and (15)–(33) of the "X7 REMOTE" connector.
2. When the START operation is performed after a power recovery, the STP pump reaccelerates
even while it is in BRAKE state.
However, the SCU-1601 may detect excessive vibration when power is recovered after the rotor
lands on the touch down bearing (see Section 8.1.4). In this case, the STP pump once stops and
cannot reaccelerate until the RESET operation completed (see Section 4.5.8).
Note: It is recommended to establish a procedure so that the power can be supplied to the
SCU-1601 immediately after a power recovery.
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