TP48200A-HX09A2, TBC300A-TCA2 Outdoor Power
System
User Manual
4 Maintenance
Issue 02 (2019-02-26)
Copyright © Huawei Technologies Co., Ltd.
44
Maintenance
Item
Maintenance Task
Check
Whether
Check
Method
Repair When
Measures
the equipment
room.
wrench.
bar in the
equipment
room is loose or
damaged.
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.
4.2.3 AC Under Volt
Possible Causes
The AC undervoltage alarm threshold is incorrectly set on the SMU.
The power grid is faulty.