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STP-H600/H1000 Series Instruction Manual
5.6.4 Powering OFF
When all three ("ACCELERATION", "NORMAL OPERATION" and "BRAKE")
lamps are off, switch the breaker OFF
on the rear panel.
The magnetic bearing stops, and the rotor lands.
The POWER ON/OFF switch built-in lamp goes out.
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NEVER switch OFF the breaker on the rear panel while any of the
"ACCELERATION," "NORMAL OPERATION" and "BRAKE" lamps is being lit.
If doing so under the above condition, the STP pump may react as if there was a
power failure.
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 causes the touch
down bearing to touch the rotor resulting in a noise.
Frequent POWER OFF operations may expedite the wear of the touch down
bearing. It is recommended to power OFF the STP pump after it stops
thoroughly.
5-6