Rectifying Common Faults; Mains Failure; Ac Over Volt; Ac Under Volt - Huawei ETP4830-A1 User Manual

ETP4830-A1 Embedded Power
User Manual

7.2 Rectifying Common Faults

7.2.1 Mains Failure

Possible Causes
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Measures
1.
2.
3.

7.2.2 AC Over Volt

Possible Causes
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
Measures
1.
2.

7.2.3 AC Under Volt

Possible Causes
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
Measures
1.
2.
Issue 10 (2017-08-08)
The AC input power cable is faulty.
The upstream AC input circuit breaker is OFF.
The power grid is faulty.
Check whether the AC input cable is loose. If so, secure the AC input cable.
Check whether the upstream 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.
Check whether the AC input voltage is lower than 50 V AC. If so, handle the power grid
fault.
The AC overvoltage alarm threshold is incorrectly set on the SMU.
The power grid is faulty.
Check whether the AC overvoltage alarm threshold is correctly set. If not, set the
threshold to the correct value.
Check whether the AC input voltage exceeds the AC overvoltage alarm threshold (280 V
AC by default). If so, handle the AC input fault.
The AC undervoltage alarm threshold is incorrectly set on the SMU.
The power grid is faulty.
Check whether the AC undervoltage alarm threshold is correctly set. If not, set the
threshold to the correct value.
Check whether the AC input voltage is below the AC undervoltage alarm threshold (180
V AC by default). If so, handle the AC input fault.
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