STP-iX457/iXU457 Series Turbomolecular Pump
MT-86E-001-F
Page 138
7
SAFETY FUNCTIONS
7.5 Troubleshooting immediately after failure occurs
The STP pump is provided with safety functions for various abnormities/errors.
A safety function operates when an abnormality/error occurs. The "STATUS" LED flashes in red. Also,
the failure signal is output from the "X2 REMOTE" connector. If an abnormality/error is found when
using the STP pump, check it and take measures in accordance with the following procedures. If you
cannot trace the cause of the error or if the STP pump does not function normally after troubleshooting,
fill in the necessary information in the "Return Declaration" form and fax it to the Service office.
7.5.1 After power failure
It is recommended to establish a procedure so that the power can be supplied to the STP pump
immediately after a power recovery.
7.5.2 After other abnormality/error
WARNING
When disconnecting cables from the STP pump and/or the cables to perform
troubleshooting and take the necessary action, confirm that the STP pump has
stopped, power off the primary power (switch the MAIN POWER to "OFF") and
isolate (Lockout/Tagout) the electrical energy source water and gas and other
energy sources on the vacuum equipment. Failure to do so may result in the
inadvertent rotation of the STP pump which may result in an accident, an electric
shock or damage to equipment. Moreover, an accident caused by water leaks or gas
leak may occur.
CAUTION
If the "STATUS” LED does not change green flash even if the RESET operation is performed,
confirm that the STP pump has stopped, turn OFF the primary power (Switch the switch
turn ON the primary power (Switch the switch "ON") again.
1. After confirming the "STATUS" LED has one flash and the STP pump has stopped, remove the
probable cause of the abnormality.
When the "STATUS" LED flashes in red, follow the recommended actions given in Table 40,
"Error List".
2. Perform the RESET operation to extinguish the "STATUS" LED (red flash).
3. Perform the START operation. Check if the STP pump operates correctly.
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