2)In case the FREE RUN state is not reset after troubleshooting:
i.Check the tachometer on the front panel.
ii.If the needle is in the red, it means the STP pump has stopped. Power OFF and switch the breaker "OFF."
iii.If the needle is in the black, the STP pump is rotating.
Wait for it to enter the red. Then, power OFF and switch the breaker "OFF. "
iv.Restart the STP pump and check if operates correctly.
CAUTION 
◇DO NOT power OFF and switch the breaker OFF until the needle is in the red.
NOTICE
◇If the FREE RUN state cannot be reset, it takes approx. 8 to 10 hours to stop the STP pump (the needle is in the red) because it rotates by inertia.
To stop the STP pump quickly, close the vacuum valve at the outlet port flange and introduce gas from the purge port into the STP pump.
3)Other Cases:
After the STP pump stops thoroughly, power OFF, switch the breaker "OFF" and remove probable causes of the abnormality/error. Then, restart the STP pump and check if it operates correctly.
15.2Abnormalities When Powering ON
(When any "Abnormality/Error Warning" lamp lights, see Section 15.5 "When Any Abnormality/Error Warning Lamp Lights.")
Table 15.1 Troubleshooting After Powering ON
No. | Symptom | Probable Cause | Countermeasures | Referred Section | |
１ | The "POWER ON/OFF" | (1) | Incorrect | Connect the power | 4.4.2 |
| switch |
| connection of | cable correctly. |
|
| (green LED) does not |
| the power |
|
|
| light, when powering |
| cable. |
|
|
| ON. |
|
|
|
|
|
| (2) | Blown fuses | Replace blown fuses | 4.1.3 |
|
|
| F3, F4. | (250 V, 5 A). | 12.3 |
|
| (3) | Abnormal | Set the voltage to the | 4.4.2 |
|
|
| power voltage | rated voltage 10%. | 16.2 |
|
| (4) | Power | Check whether or | 6.1.1 |
|
|
| failure. | not a power failure |
|
|
|
|
| has occurred. |
|
