DS8000 Service Documentation Version 7.5

MAP2241 Rack battery module set born-on date mismatch

One or more of the battery service module (BSM) sets in the rack has a born-on date that is more than two years older than the BSM set with the newest born-on date.

About this task

A rack 1, 2, or 3 BSM sets based on installed rack features.
A BSM set contains four battery modules.
All four battery modules are always replaced as a set.
The battery was split into four modules was to keep the individual weight below the limit for a single service representative to handle.
The primary battery module which include three status LED indicators can only be installed at the top of the set.
The three secondary battery modules can only be inserted below the primary battery module. The three secondary battery modules are interchangeable within the set.
The four battery modules in the set are treated as one battery by the DC-UPS.
The born-on date of each BSM set in the rack must not differ by more than two years. This ensures that their charge/discharge characteristics, which change over time, remain compatible.

MAP2241 Section-1

Procedure

One or more of the BSM sets in the rack has a born-on date that is more than two years older than the BSM set with the newest born-on date in the same rack.
Remove the BSM set cover (if present) from the BSM set enclosure.
1. At the bottom of the cover, pull the knob out on both fasteners.
2. Pull the bottom of the cover away from the BSM set.
3. Lift the cover up until the two top sheet metal tabs are released from the BSM set enclosure.
Observe the battery born-on date label on BSM set.
Is there more than a two-year difference?
- Yes, go to the next step.
- No, reinstall the BSM set cover (if removed) and then exit this MAP. All BSM sets are within their limits.
Do you have a serviceable event that lists the location code of the specific battery module set to be replaced? See the lower left of Figure 1 for the location codes (E10, E11, and E12).
- Yes, use the serviceable event FRU list to replace the battery module set.
- No, use the location code and refer to MAP1230 Replace a FRU without using a serviceable event.
Figure 1. Battery service module (BSM) set locations (front)