December 2021
Service Manual
MDE 252 Rev. 1
Troubleshooting
28
Section 2: Troubleshooting
2.14 The Electrical Power is off and Numeric
Display is Off
The 9 V Lithium batteries is discharged or is not present or is congured as "absent".
1. Check that battery is really discharged.
2. Check current absorbed from battery and then change logic card.
3. Check the battery conguration (see Installation, Operation and Maintenance
Manual, VCIOM-08500).
2.15 Replacement of the 9 V Lithium Battery
!
WARNING
Since the control and terminal board compartments contain a 9 V and 3.6 V lithium
batteries, only open it in safe area. If the actuator is located in a hazardous area, a "hot
work" permit must be obtained unless the actuator can be moved to a non-hazardous area.
Isolate the main supply to the actuator and all other control voltages. Open the terminal
boards cover.
Figure 11
Disconnect two wires (+) (-) from the main board. Bring the cover to a safe area. When in a
safe area: Remove the label.
Figure 12
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