Huawei Telecom Power TP48120A-HD15A1 - Rectifying Common Faults; AC Failure; AC over Volt

TP48120A-HD15A1, TP48120A-HD15A2,
TP48200A-HD15A1, and TP48200A-HD15A2 Telecom
Power
User Manual
4 Maintenance
Issue 03 (2020-01-04)
Copyright © Huawei Technologies Co., Ltd.
40
Maintenance
Item
Check Whether
Check Method
Repair When
Measures
circuit voltage
exceeds its
threshold.
Common Faults.
Preventive
maintenance
inspection (PMI)
Indicators are normal.
By observing.
An alarm is
generated.
Appearance
The paint or
electroplated coating
on the cabinet flakes
off or has scratches.
By observing.
The surface is
damaged or
distorted.
Repaint or repair
the shell.
Grounding
The ground point
properly connects to
the ground bar in the
equipment room.
By observing the
grounding and
using a screwdriver
or wrench.
The cable
connecting the
ground point and
the ground bar in
the equipment room
is loose or
damaged.
Secure the ground
point or replace the
cable.
4.2 Rectifying Common Faults
4.2.1 AC Failure
Possible Causes

The AC input power cable is faulty.

The AC input circuit breaker is OFF.

The mains grid is faulty.
Measures
1. Check whether the AC input cable is loose. If yes, secure the AC input cable.
2. Check whether the AC input circuit breaker is OFF. If yes, handle the back-end circuit
failure and then switch on the circuit breaker.
3. Check whether the AC input voltage is lower than 50 V AC. If yes, handle the mains
grid fault.
4.2.2 AC Over Volt
Possible Causes

The AC overvoltage alarm threshold is not set properly on the SMU.

The power grid is faulty.