FAQ-The ambient temperature and humidity sensor displays no information, What should be done

Publication Date:  2014-10-29 Views:  165 Downloads:  0
Issue Description
The ambient temperature and humidity sensor displays no information, What should be done?
Solution
Possible Causes:
1) The ambient temperature and humidity sensor is faulty.
2) The power supply to the ambient temperature and humidity sensor is faulty.
3) The circuit is faulty.

Procedure:

Step 1 Check whether the ambient temperature and humidity sensor works properly.

Check whether the liquid crystal display (LCD) displays a temperature and humidity.

Y: If the ambient temperature and humidity sensor displays a temperature and humidity, go to Step 3.
N: If the ambient temperature and humidity sensor displays no temperature or humidity, go to Step 2.

Step 2 Check that power is supplied to the ambient temperature and humidity sensor properly.

Use a multimeter to check whether the port voltage of the ambient temperature and humidity sensor is 12 V.

Y: If yes, the power supply is normal. Replace the ambient temperature and humidity sensor.
N: If no, the power supply is abnormal. Replace the faulty power supply and check whether the fault persists.
If the fault is rectified, troubleshooting is complete.
If the fault persists, replace the ambient temperature and humidity sensor.

Step 3 Check whether the serial port circuit of the ambient temperature and humidity sensor is normal.

Use an ambient temperature and humidity sensor to check the ambient temperature and humidity sensor for faults section by section.

Y: If the circuit is faulty, replace the circuit and check whether the fault persists.
If the fault is rectified, troubleshooting is complete.
If the fault persists, contact Huawei technical support.
N: If the circuit is normal but the fault persists, contact Huawei technical support.

END