Exchange the DC-UPS battery service module (BSM) set

Before you begin

Icon for electrostatic discharge wrist strap Use approved ESD procedures to prevent damage.

Attention:

This procedure is not a stand-alone procedure. Customer disruption and damage to the hardware might occur when microcode and power boundaries are not in the proper conditions for this service action.
If a serviceable event FRU repair directed you to this procedure, the microcode and power boundaries are already set.
If a serviceable event FRU repair did not direct you to this procedure, see MAP1230 Replace a FRU without using a serviceable event.

Notes:

All the cables and FRUs to be removed must be uniquely identified so they can be reinstalled correctly.
The battery service module (BSM) set contains four battery modules.
The top BSM is the primary and contains status LEDs. It can be physically installed only in the top position.
The three BSMs below the primary BSM are secondary BSMs. They can be physically installed only in those positions.
Each BSM (primary and secondary) has EEPROMs that store the "Born on date" and the service history.
All four BSMs in a set must be replaced at the same time, and must not be intermixed with a different BSM set.
Each BSM in the set share a common serial number on the Born On Date label.
You are using this procedure to exchange a BSM set. Unless directed by a MAP or next level of support, you must replace the FRU with a new FRU. Performing a "pseudo-repair" with an out-of-date or defective FRU, or closing a serviceable event without exchanging the FRU, can result in a customer event.
If an installed earthquake resistance kit prevents you from accessing this FRU, refer to MAP1600.

Remove the BSM set

Procedure

The old BSM set being replaced must be returned in the same packing material and strapped to the pallet that the new modules arrived on.
To locate this FRU, take one of the following actions and then return here and continue to replace the FRU:
- If this FRU has a FRU identify indicator, use the FRU identify indicator, which is listed in MAP1240 Locating FRUs by using identify indicators. If not, use the location code.
  Note: There might be cases where the FRU failure or fencing conditions prevent the FRU LED indicator from being lit even if the FRU has power.
- Use the location code, which is listed in MAP1245 Finding FRUs by using location codes.
- If there is no FRU identify indicator or location code, you were sent here by an isolation MAP or symbolic FRU procedure. Use the information in that procedure and the figures in this procedure to locate the proper part to exchange.
Figure 1. Battery service module (BSM) set locations (Models 961, 96E) (front)
Most, but not all, FRUs have identify indicators. Use the flashing amber or solid blue FRU identify indicators to ensure that you are working on the correct enclosure or FRU.
- The light path identify LEDs are a hierarchy of LEDs that can identify the rack, enclosure, FRU, and even the FRU connector to which a cable is connected.
- For more information, refer to MAP1240 Locating FRUs by using identify indicators.
Remove the BSM set cover (if present) from the BSM set enclosure.
1. At the bottom of the cover, pull out the knob on both fasteners.
2. Pull the bottom of the cover away from the BSM set.
3. Lift the cover up until the two top sheetmetal tabs release from the BSM set enclosure.
Are any of the following cables either unplugged or missing? See Figure 2.
- and BSM set signal cable. Note: on later version is permanently attached.
- and BSM set 208V power cable
- Yes, do not replace the BSM set. Instead, go to the next step, and when you are directed to replace the BSM set, connect the disconnected cable(s).
- No, go to the next step.
Figure 2. Cables for battery module set
If you are replacing the upper leftmost battery module set (E1-E10), first remove the rack cover latch by removing the two screws .

Figure 3. Battery service module (BSM) set locations (front)
Remove the retaining screw or (Figure 2) at the top of each battery service module that is being replaced.
Leave all cables connected. Slide the primary BSM module out about 2.5 cm (1 inch). The BSM LEDs turn off.
Disconnect the BSM signal cable from the three secondary BSM module J31 connectors. (Figure 4)

Figure 4. Battery service module, secondary, locations (front)
Disconnect the BSM power cable from the three secondary BSM module J21 connectors. (Figure 4)
Leave the BSM signal and power cables connected to the primary BSM module J30 and J20 connectors. (Figure 5)

Figure 5. Battery service module, primary, locations (front)
Gently slide the primary battery service module and permanently attached cables out of its slot. Support the weight of the module when the module is near being removed.
Gently slide the three secondary battery service modules out of there slots. Support the weight of the module when the module is near being removed.

Install the BSM set

Procedure

Install the three secondary battery service modules in the lower positions. See Figure 2.
WARNING:
- The primary BSM and communication cable with protection plate, when connected, are a single unit and must not be disassembled.
- The signal cable must be connected to the J30 connector on the primary BSM before you insert the BSM into the DC-UPS chassis.
- To connect the cable (if needed), do not attempt to loosen or remove the protection plate.
- Do not attempt to remove the signal cable from the primary BSM.
Ensure that the signal cable is connected to the primary BSM module J30 connector. See Figure 5.
If the power cable is not connected to the primary BSM module J20 connector, connect it now. See Figure 5.
Insert the primary battery service module with permanently attached cables into the top position. See Figure 2. Stop when the BSM is about 2.5 cm (1 inch) from fully seated.

Important: Do not fully insert the primary BSM until after the power and signal cables have been connected to the secondary BSMs.
Connect the power cable to the three secondary BSM module J21 connectors. See Figure 4.
Connect the signal cable to the three secondary BSM module J31 connectors. See Figure 4.
Insert the primary BSM until it is fully seated.
Install the retaining screw or at the top of each battery service module that is being replaced. See Figure 2.
If removed, reinstall the rack cover latch.
Install the BSM set enclosure cover (if removed).
1. With the bottom of the cover held out some, insert the cover top tabs into the BSM set enclosure slots.
2. Bring the bottom of the cover against the BSM enclosure.
3. Ensure that both fasteners are seated and then push the button in to latch them.
4. Give a gentle pull to the bottom of the cover to ensure that it is fastened.
You must return the old BSM set in the packing materials and strapped on the pallet that the new BSM set arrived on.
Note: If the packing materials are damaged, you must order a new packing materials kit (FRU P/N 45W9747) to ensure that the batteries are properly protected.
You must strap the box to the pallet for return with the field strapping kit (FRU P/N 92X9720). The field strapping kit should be included in the packing materials; if not, order it separately.
This FRU contains lead/acid gel batteries that must be properly disposed of. See return instructions in the FRU packaging or use your local procedures.
Exit this service information center parts exchange procedure and return to the procedure that sent you here.