MKS T3PIA, Instruction Manual, Page: 47 / 70

Preventive Maintenance Chapter Five: Maintenance and Troubleshooting
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11. With one hand, depress and hold in the MAINTENANCE button. (This will move the seal ring into a
position that allows it to be unlocked.)
Note The software looks for the MAINTENANCE button only if the valve is in position mode AND
the valve is at 100 percent.
12. While keeping the maintenance button depressed, unlock the seal ring by moving the handle in the
indicated direction on the handle. Refer to Figure 18
Figure 18: Handle
13. Release the MAINTENANCE button.
14. Remove the seal ring.
Figure 19: Seal Ring Removal