Sun Yeh Electrical M Series, Operation Manual, Page: 69 / 75

【M Series】Multi-turn Electric Valve Actuator
66
2021.06
9.3 Maintenance
Damage might be caused by inappropriate maintenance!

Maintenance and repair works must be performed by trained personnel.

Turn power off before maintenance or repair.

Carry out visual inspection every year to ensure no damage or changes.

Ensure the wiring no damage or loose and correct wiring.

If the paint was peeled off, the housing needs to be touched up with the paint to prevent
corrosion.

Check if the water-proof cable glands and blanking plugs are tightened and sealed.

Check if the wiring and the terminals fade to prevent the short circuit and the failed PCBA
caused by the temperature rise.

Ensure the seals are placed correctly without hardening or damage.

Ensure all housing screws are tightened.

If any safety problems are detected during maintenance, the actuator must be repaired im-
mediately without delay.

Using the original or equivalent to replace the seals, and etc..
9.4 Operation Protection
The following actions are required to ensure safe device operation :

Perform the operating test every 6 months.

Check if the cable, cable glands, blanking plugs, and etc. are tightened and sealed.

Operate the actuator per the rated torque, or the product may be damaged under torque
overload.

If the screws which combine the actuator with the gearbox are tightened per the recommend
torque value.

Lubricate the valve stem and connection parts.