Lead acid batteries need to be discharged regularly as a maintenance routine.
This helps prolonging the battery life time.
A battery test and maintenance plan must be implemented according to the
battery manufacturer’s recommendations. For lead acid batteries, this implies
that the batteries must be completely discharged on a regular basis.
Battery discharge of lead acid batteries must only take place while the ship is at
port, for example during system revision shutdowns or as part of ship
maintenance routines. It implies that the actuator is nonoperational during this
procedure. The discharge routine is expected to take approximately 24 hours
and should be carried out once a year.
For more details, please refer to the System Integrators Manual.
The following procedure should be performed once a year.
1. Set the actuator in service mode.
2. Send the command «Start Battery Deep Cycle Test” (see System Integrators
Manual).
3. The actuator automatically charges the battery to 100%.
4. The bit «BATTDIS» in Failsafe index 0x25000 Status 2 indicates that the
test is performed.
5. When the battery reaches 0% the «BATTDIS» is automatically cleared, the
SOH value is updated, and the battery is recharged.
6. When the battery has reached the lower limit for SOC, service mode can be
cleared, and the actuator resumes normal operation.
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