STP-iX457/iXU457 Series Turbomolecular Pump
MT-86E-001-F
Page 134
7
SAFETY FUNCTIONS
7.1.8 Overspeed
When the rotational speed of the STP pump exceeds 58,000 rpm due to a failure in the motor driver,
the STP pump decelerates and stops. When the rotational speed increases and exceeds 59,000 rpm,
the STP pump changes into free-running and stops.
The "STATUS" LED flashes in red, and a failure signal is output from the "X2 REMOTE" connector.
7.2 "WARNING" function
7.2.1 "WARNING" function
The STP pump is provided with a WARNING function when an overhaul is needed following a self-test
as shown in Table 37.
When a warning is detected, the "STATUS" LED flashes in orange only in rated operation and
levitation state. Also, the warning signal is output from the "X2 REMOTE" connector.
The serial communication, the STP-Link (optional accessory), or the power supply unit iPD-240-24V
(optional accessory) can confirm the error message, and change the settings.
Refer to Section 5, "Serial Communication Protocol", the STP-Link or the power supply unit
iPD-240-24V Instruction Manual of the optional accessories for details.
No
Warning
1
Other Warning
(Other warnings)
2
First Damage Limit
Second Damage Limit
(Touch down bearing warning function)
3
Pump Run Time Over
(Pump runtime warning function)
4
Pump Overload
(Pump overload warning function)
5
Imbalance
(Excessive imbalance warning function)
Table 37 - WARNING function
Note: The WARNING detection cannot be reset by the "RESET" operation.
See Section 7.4, "WARNING function setting" for the releasing the WARNING detection.
The STP pump can operate even when the WARNING is detected.
Overhaul the STP pump when WARNING detection is indicated.
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