Dc Under Volt; Amb. Over Temp - Huawei ETP4830-A1 User Manual

ETP4830-A1
User Manual
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Measures
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7.2.5 DC Under Volt

Possible Causes
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Measures
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7.2.6 Amb. Over Temp

Possible Causes
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Measures
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Issue 06 (2014-02-20)
Rectifiers are faulty.
The power system voltage is set too high in manual mode.
Check whether the DC overvoltage alarm threshold (58 V DC by default) is properly set.
If no, adjust it to a proper value.
Remove the rectifiers one by one and check whether the alarm is cleared. If the alarm
still exists, reinstall the rectifier. If the alarm is cleared, replace the rectifier.
Check whether the system voltage is set too high in manual mode. If yes, confirm the
reason and adjust the voltage to normal after the operation.
An AC power failure occurs.
The DC undervoltage alarm threshold is not set properly on the SMU.
Rectifiers are faulty.
The system configuration is not proper.
The power system voltage is set too low in manual mode.
Check whether an AC power failure occurs. If yes, resume the AC power supply.
Check whether the DC undervoltage alarm threshold (45 V DC by default) is properly
set. If no, adjust it to a proper value.
Check whether the power system capacity is insufficient for the loads due to rectifier
failures. If yes, replace the faulty rectifier.
Check whether the load current is greater than the current power system capacity. If yes,
expand the power system capacity or reduce the load power.
Check whether the system voltage is set too low in manual mode. If yes, confirm the
reason and adjust the voltage to a proper value after the operation.
This alarm is generated only for the power system that has ambient temperature sensors installed.
The ambient overtemperature alarm threshold is not set properly on the SMU.
The temperature control system is faulty in the cabinet where the ambient temperature
sensor is located.
The ambient temperature sensor is faulty.
Check whether the ambient temperature alarm threshold (50° C by default) is properly set
on the SMU. If no, adjust it based on site requirements.
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