STP-301/451 Series Instruction Manual
6-2
Installation
(7) "ACCEL." Lamp (green LED)
z Illuminates during acceleration (ACCELERATION state).
(8) "NORMAL" Lamp (green LED)
z Illuminates during rated speed operation (NORMAL OPERATION state).
(9) "BRAKE" Lamp (yellow LED)
z Illuminates during deceleration (BRAKE state).
(10) "POWER" Lamp (green LED)
z Illuminates while the power is ON.
z Distinguishes while the backup power is being supplied.
(11) "FAILURE" Lamp (red LED)
z Illuminates when any of the following abnormalities occurs.
z The LCD displays an error message simultaneously.
a) When the inside of the STP control unit overheats (70
°C or more inside the
circuit);
b) When the inside of the STP pump overheats (110
°C or more inside the motor or
electromagnet);
c) When the motor driver overloads;
d) When a power failure occurs;
e) When the STP connection cable is not connected;
f) When vibration impact is continuously applied to the rotor causing it to come
into contact with the touch down bearing.
(12) "REMOTE" Lamp (green LED)
z This lamp is on while the operation mode is remote.
(6) (5)
(1) (2) (3)
(7) (8) (9)
(10) (11) (12)
(4)
Figure 6.1 STP Control Unit Front Panel
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