
7
Handling Common Faults
This describes the solutions to common faults in the EMU.
lists the solutions to common faults in the EMU.
Table 7-1
Solutions to common faults in the EMU
Symptom
Solution
The power indicator is OFF.
Check whether the power cable is inversely connected.
Check whether the protection tubes F1, F2, F3, and F4 are
burned out.
The EMU fails to communicate
with the BTS/NodeB.
Check whether the communication cables are intact.
Check whether the communication protocol is correctly
configured.
The relay malfunctions.
Check whether the output cabling of the relay is correct.
Boolean value input fails.
Check whether the alarming states are correctly set.
Check whether the cabling is correct.
The humidity/temperature
sensor generates an alarm at
normal temperatures.
Check whether the humidity/temperature sensor is
correctly connected.
Check whether the alarming threshold is correctly set.
The humidity/temperature
query results are invalid values.
Check whether the humidity/temperature sensor is
correctly connected.
Check whether the DIP switch SW_THE is correctly set.
Check whether the sensor fails, for example, by comparing
it with another sensor.
The water sensor generates a
false alarm.
Check whether the water sensor is correctly connected.
Check whether the DIP switch SW_BKE 1 is correctly set.
EMU
User Guide
7 Handling Common Faults
Issue 13 (2009-12-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
7-1