Communication Failure (Esmu); All Esmu Communication Failure; Board Hardware Fault; Low Temperature Protection - Huawei DPU40D-N06A3 User Manual

DPU40D-N06A3, DBU20B-N12A3, and
DBU50B-N12A1 Distributed Power System
User Manual

5.2.10 Communication Failure (ESMU)

Possible Cause
The communications cable between the battery and PSU is loose.
Solution
Check whether the communications cable between the battery and PSU is loose. If so, secure
the cable.

5.2.11 All ESMU Communication Failure

Possible Cause
The battery communications cable is loose.
Solution
Check whether the battery communications cable is loose. If so, secure the cable.

5.2.12 Board Hardware Fault

Possible Cause
The battery control board is faulty.
Solution
Replace the faulty module.

5.2.13 Low Temperature Protection

Possible Causes



Solution
Check whether there is a battery heater fault alarm on the app. If the alarm exists, replace the
battery. If the alarm does not exist, wait for a certain period and check whether the battery
temperature rises to above 0° C. If yes, no further action is required. If not, replace the battery.

5.2.14 High Temperature Protection

The ambient temperature for the battery is high.
Issue 04 (2020-02-29)
The battery has discharged for a long period in a low-temperature environment.
The battery is powered on for the first time and the temperature does not rise to above
0° C.
The battery heater is faulty.
Copyright © Huawei Technologies Co., Ltd.
5 Maintenance
36