Sun Yeh Electrical M Series, Operation Manual, Page: 21 / 75

【M Series】Multi-turn Electric Valve Actuator
18
2021.06
7 Manual Operation

Incorrect settings may lead to valve damage.

Perform all basic settings including stroke limitation for open and close direction prior
to operation.

For purposes of setting and verifying, the actuator can be operated manually in case
of motor failure or power outage. Manual operation is engaged by an internal
changeover mechanism. Remove the lock for manual operation in any time and re-
lock after using manual operation. Even if supply power to actuator during manual
operation, it will not switch from manual to electric operation and cause personal
injury.
7.1 Manual Operation Steps
a. Disengage motor operation before manual operation
b. Remove the lock from handwheel lever.
c. Reverse the lever to engage handwheel for manual operation. Meanwhile, the LCM screen
displays “Handwheel Open” and local operation or setting by push button will not be possi-
ble.
Display Indication
Standby
Setting / Operating