TP48200A-D17A5-2 Telecom Power
User Manual
4 Maintenance
Issue 04 (2019-12-20)
Copyright © Huawei Technologies Co., Ltd.
34
4.1.2 AC and DC Power Distribution
Table 4-2
AC and DC power distribution maintenance
No.
Maintenance Item
If...
Then...
1
Check whether an indicator on
the surge protective device
(SPD) is red.
Red: The SPD is damaged
due to a voltage surge or
lightning strike.
Green: The SPD is normal.
Replace the SPD if it is
damaged.
2
Check the SPD circuit breaker
status.
OFF: A voltage surge or
lightning strike has
occurred.
ON: The SPD is normal.
1.
Replace the circuit breaker if
it is damaged, replace it
2.
Turn on the circuit breaker if
the SPD is intact.
3
Check for AC input
undervoltage.
AC input power cables
have a large voltage drop.
AC input power cables are
in poor contact.
The mains voltage is too
low.
1.
Replace AC input power
cables with shorter or thicker
cables.
2.
Connect AC input power
cables securely.
3.
Provide the voltage data to
the power supplier.
4
Check for AC input
overvoltage.
The mains voltage is too high.
Provide the voltage data to the
power supplier.
5
Check whether the AC input
voltage is open-phase.
AC input power cables are
in poor contact,
short-circuited, or
damaged.
The mains supply has
failed.
1.
Check and rectify the cables.
2.
Provide the open-phase data
to the power supplier.
6
Check whether a DC output
circuit breaker is OFF and a
fuse is blown.
Load overcurrent occurs.
Load short-circuit occurs.
Rectify any overcurrent or short
circuit. Turn on the circuit
breaker or replace the fuse.
7
Check for DC busbar
overvoltage.
A rectifier is abnormal.
Replace the abnormal rectifier.
8
Check for DC busbar
undervoltage.
The AC power supply has
failed.
The system is overloaded.
A rectifier is abnormal.
1.
Resume the AC power
supply.
2.
Check the load status and
rectify faults if any.
3.
Replace the abnormal
rectifier.
9
Check whether the temperature
of a DC busbar working at room
temperature exceeds 95°C.
The DC busbar is loose or
in poor contact.
The system is overloaded.
1.
Check and secure cabinet
busbar connections.
2.
Check the load status and
rectify faults if any.