TP48200A-HT15D3 Telecom Power (Russia, Megafon)
User Manual
4 Maintenance
Issue 03 (2019-11-15)
Copyright © Huawei Technologies Co., Ltd.
44
Item
Check Whether
Check Method
Repair When
Measure
Preventive
maintenance
Indicators are
normal.
By observation
An alarm is generated.
Appearance
The paint or
electroplated coating
on the cabinet is
intact.
By observation
The cabinet is damaged
or deformed.
Repaint and repair
the shell.
Grounding
The ground point
properly connects to
the equipment room
ground bar.
By observation or by
using a screwdriver
or wrench
The cable connecting
the ground point and
the equipment room
ground bar is damaged
or loose.
Secure the ground
point or replace the
ground 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 power grid is faulty.
Measures
1.
Check whether the AC input cable is loose. If so, secure the AC input cable.
2.
Check whether the AC input circuit breaker is OFF. If so, handle the fault which caused
the AC input circuit breaker to turn OFF and then switch on the circuit breaker.
3.
Check whether the AC input voltage is lower than 50 V AC. If so, handle the power grid
fault.
4.2.2 AC Over Volt
Possible Causes
The AC overvoltage alarm threshold is incorrectly set on the SMU.
The power grid is faulty.
Measures
1.
Check whether the AC overvoltage alarm threshold is correctly set. If not, set the
threshold to the correct value.
2.
Check whether the AC input voltage exceeds the AC overvoltage alarm threshold (280 V
AC by default). If so, handle the AC input fault.