Emerson Bettis SCE300 - Special Maintenance; Troubleshooting; The Electronics Do Not Switch on When Powered

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Installation and Maintenance Instructions
MAN-02-04-99-0712-EN Rev. 1
February 2020
Maintenance and Troubleshooting
Section 7: Maintenance and Troubleshooting
7.1.2 Special Maintenance
In case of actuator failure, refer to Section 7.2 for possible causes. Spare parts can be
ordered from Emerson; refer to the individual item number shown in Section 8.
The actuator must be disassembled if grease is leaking past the seals, malfunction
of mechanical and/or electronic components is evident, or if scheduled preventative
maintenance is to occur. Refer to the parts lists and exploded view drawings in Section 9 to
determine what replacement components to order.
It is essential that every component ordered from Emerson references both the serial number
of the actuator and the item number of the required component.
Special maintenance is recommended should the actuator generate excessive noise
during operation.
NOTICE
After maintenance work has been performed, stroke the actuator multiple times to verify
that the actuator is functioning correctly and no grease is leaking past the seals.
7.2 Troubleshooting
Every SCE300 actuator passes an outgoing functional test in the factory, performed by
Emerson Quality Assurance personnel.
If the actuator does not work, prior to troubleshooting ensure that:
• The main supply is the same as stated in the nameplate menu
• The green LED for available power supply is switched on
• Power supply is available to the actuator and no protective device has de-clutched
in the plant
• Check the position of the dip switch SW3: it must be ‘1’
7.2.1 The Electronics do not Switch on when Powered
• Check that the value of the main voltage on terminals L1 and L2 (and in the same
case L3) is correct
• Remove the cover assembly
• Check the continuity of the wires between terminals L1, L2, L3 and the connector
of the power card
• If there is no continuity on the L1-L2-L3 cables, replace the terminal board
• If continuity on the L1, L2, L3 cables checks out OK, replace the entire drive and
control unit