BoostLi Energy Storage Module ESM-48100B1
User Manual
Copyright © Huawei Technologies Co., Ltd.
Context
ESM replacement may cause a system power failure. To prevent power failures, ensure that
other power sources, such as the mains, diesel generator, or a third-party DC power source,
provide continuous power supply.
Replacement Requirements
Conditions for the ESM to enter and exit the maintenance mode:
1. In the non-maintenance modes, hold down the Manual ON/OFF button for at least 15s to
enter the maintenance mode.
2. In the maintenance mode, hold down the Manual ON/OFF button for at least 15s to exit
the maintenance mode.
Before replacing an ESM in an actual maintenance scenario, hold down the Manual ON/OFF
button for the ESM to power off. After the ESM is replaced, hold down the Manual ON/OFF
button for at least 15s on the new ESM to exit the maintenance mode.
Removing the Old ESM
Step 1 Wear the protective gloves.
Step 2 Switch the BAT– battery circuit breaker on the power system to OFF or remove the battery
fuse.
Step 3 Use the Manual ON/OFF button on the ESM to turn off the battery output.
Step 4 Disconnect the cables from the old ESM. Insulate each cable and label it immediately after
disconnecting it.
Step 5 Loosen the screws on the panel and remove the ESM.
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Installing the New ESM
Step 1 Install the new ESM and tighten the screws.
Step 2 Hold down the Manual ON/OFF button for 15s for the ESM to enter the maintenance mode.
In this mode, all indicators blink, the ESM board is activated, but the ESM will not be
charged or discharged.
Step 3 Connect the cables to the new ESM based on the cable labels.
Step 4 Switch the BAT– battery circuit breaker in the power system to ON or reinstall the battery
fuse using a fuse extracting unit.
Step 5 Hold down the Manual ON/OFF button for 15s for the ESM to exit the maintenance mode.
The ESM is automatically activated and connects to the power system.
Step 6 Remove the protective gloves and pack up all tools.
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