Distributed Power Unit; Lithium Battery - Huawei DPU40D-N06A3 User Manual

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

5.1.2 Distributed Power Unit

Table 5-2 Distributed Power Unit maintenance
No.
1
2

5.1.3 Lithium Battery

Table 5-3 Lithium battery maintenance
No.
1
Issue 04 (2020-02-29)
Item Possible Fault Cause
Check the green  Off: The PSU has no
indicator status power input (no AC
(normal: steady input and no battery
on). input).
 Steady on: Start /
Self-check / Load
(instantaneous status
during startup or
upgrade).
 Blinking fast (4 Hz):
The PSU is not
communicating with the
host properly.
Check the red  Steady on: Rectifier
indicator status Fault/Monitoring
(normal: off). Address
Conflict/Monitoring
Unit Fault.
 Blinking at short
intervals (0.5 Hz):
Rectifier
Protection/Power
off/Communication
Failure/Rectifier Power
Failure/Parallel Fail/AC
Overvoltage or
Undervoltage
Item Possible Fault Cause
Check the green Off: The lithium battery
indicator status has no DC input or is
faulty.
(normal: blinks
slowly at 0.5
Steady on: Board startup /
Hz).
self-check / loading /
activation / board
power-on when no
software is loaded.
Copyright © Huawei Technologies Co., Ltd.
5 Maintenance
Suggestion
1. Check the AC input of the
PSU.
2. Check that the PSU
communications cable is
correctly connected and the
upstream monitoring
equipment works properly.
3. Replace the PSU.
1. If multiple PSUs are
connected in parallel, check
that the communications
and power cables are
properly connected between
them.
2. Replace the PSU.
Suggestion
1. Check the AC input of the
lithium battery.
2. Check the power cable
connection.
3. Check the fuses for the ports
on the PSU and lithium
battery.
4. Check the PSU output.
5. Replace the lithium battery.
6. Check the communications
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