ETP48400-C9A2 Embedded Power
User Manual
7 Maintenance
Issue 05 (2020-04-07)
Copyright © Huawei Technologies Co., Ltd.
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Possible Causes
The high ambient humidity alarm threshold is incorrectly set.
The humidity is too high in the cabinet where the humidity sensor is located.
The humidity sensor is faulty.
Measures
1.
Check whether the high humidity alarm threshold (80% RH by default) is correctly set.
If no, adjust it to a proper value.
2.
Check whether water intrudes into the cabinet. If yes, wipe the water with dry cotton or
other tools and rectify the fault.
3.
Check whether the humidity sensor is faulty. If yes, replace the humidity sensor.
7.2.13 Low Ambient Humidity
This alarm is generated only for the power system that has a humidity sensor installed.
Possible Causes
The low ambient humidity alarm threshold is incorrectly set.
The humidity is too low in the cabinet where the humidity sensor is located.
The humidity sensor is faulty.
Measures
1.
Check whether the low humidity alarm threshold (10% RH by default) is correctly set. If
no, adjust it to a proper value.
2.
Check whether the humidity inside the cabinet is too low. If yes, adjust the humidity.
The alarm is cleared when the humidity returns to the allowed range.
3.
Check whether the humidity sensor is faulty. If yes, replace the humidity sensor.
7.2.14 Batt. High Temp.
This alarm is generated only for the power system that has a battery temperature sensor installed.
Possible Causes
The high battery temperature alarm threshold is incorrectly set.
The battery temperature control system is faulty.
The battery temperature sensor is faulty.
Measures
1.
Check whether the high battery temperature alarm threshold (50°C by default) is
correctly set. If not, set the threshold to the correct value.
2.
Check whether the battery temperature control system is faulty. If so, rectify the fault.
The alarm is cleared when the battery temperature falls within the allowed range.
