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STP-H600/H1000 Series Instruction Manual
5.5.5 Powering OFF
1) When all of the "ACCELERATION," "NORMAL OPERATION" and "BRAKE"
lamps are off:
Press the "POWER ON/OFF" switch. The switch pops up into the unlocked
position, the magnetic bearing stops, and the rotor lands (POWER OFF state).
The "POWER ON/OFF" switch built-in lamp goes out.
2) When one of the "ACCELERATION," "NORMAL OPERATION" and "BRAKE"
lamps is lit:
i. Even when the "POWER ON/OFF" switch is OFF, the rotor will not land.
Also, operation of the STP pump remains unchanged.
The "POWER ON/OFF" switch built-in lamp remains lit.
ii. When the STP pump stops under the above state, the magnetic bearing
stops, and the rotor automatically lands at the time the "BRAKE" lamp
goes out.
NOTICE
The brake of the STP pump disengages at approx. 1000 rpm and the "BRAKE"
lamp goes out. The STP pump rotates by inertia even after the "BRAKE" lamp
has gone out.
Powering OFF immediately after the "BRAKE" lamp goes out or while any lamp
of the “ACCELERATION," "NORMAL OPERATION," or "BRAKE" lamp is being
lit causes the touch down bearing to touch the rotor resulting in a noise.
Frequent POWER OFF operations will expedite the wear of the touch down
bearing. It is recommended to power OFF the STP pump after it stops
thoroughly.
5-4