Why is my Huawei Measuring Instruments LCD black or blinking?
The LCD screen may be black or blinking due to a disconnected input N wire. Make sure to secure the input N wire. Alternatively, the LCD itself may be faulty, in which case you should replace the LCD.
What to do if the LCD fails to display the circuit breaker status on Huawei Server?
If the LCD on your Huawei Server isn't showing the circuit breaker status, it's possible that the communications cable of the Boolean value collection module or the corresponding branch Boolean value signal cable is not properly connected.
What to do if the LCD is black or blinks on my Huawei Server?
If the LCD screen on your Huawei Server is black or blinking, it could be due to a disconnected input N wire. Ensure that the input N wire is securely connected. Alternatively, the LCD itself might be faulty and needs replacement.
Why the indicators of the monitoring board module do not light up on Huawei Server?
If the indicators on the monitoring board module of your Huawei Server are not lighting up, it might be due to improperly connected cables.
What to do if the indicators of the Huawei Power distribution unit monitoring board module do not light up?
If the indicators on your Huawei Power distribution unit's monitoring board module aren't lighting up, it could be due to improperly connected cables. In this case, replace the monitoring board. Alternatively, the monitoring board itself might be faulty, in which case you should contact Huawei technical support.
How to fix a leakage current sensor indicator that is off on Huawei Network Hardware?
If the leakage current sensor indicator is off, the sequence of wiring from the insulation monitoring instrument to the leakage current sensor might be incorrect. To fix this, connect the cables in the correct sequence. Another possible cause is that the leakage current sensor is faulty. In this case, replace the leakage current sensor.
Why is the ALA indicator on for Huawei Network Hardware insulation monitoring instrument?
The ALA indicator might be on because the cables to the J2 terminals HM +, HM–, and PE on the insulation monitoring instrument are reversely connected. To solve this, connect the cables in the correct sequence. Another reason could be that the insulation between the positive and negative buses and the ground is abnormal. In this situation, check whether the upstream power supply, downstream loads, and input and output cables are damaged or short-circuited to the ground. If so, replace the cables.
What to do if the RUN indicator is off on Huawei Network Hardware insulation monitoring instrument?
If the RUN indicator is off, it could be due to a faulty PSU for the insulation monitoring instrument. In this case, replace the PSU or its fuse. It could also be that the upstream fuse for the PSU of the insulation monitoring instrument is faulty. Replace the PSU or its fuse.
Why the indicators of the monitoring board module do not light up on Huawei Power distribution unit?
If the indicators on the monitoring board module of your Huawei Power distribution unit are not lighting up, it could be due to improperly connected cables. In this case, replace the monitoring board module. If the issue persists, the monitoring board itself may be faulty, and you should contact Huawei technical support.
Why does the LCD fail to display branch currents on my Huawei Power distribution unit?
If the LCD on your Huawei Power distribution unit fails to display branch currents, it may be due to a loose connection in the monitoring board communications cable or the secondary cable to the corresponding branch current transformer. Consider replacing the monitoring board module. It could also indicate a fault with the current detection module or current transformer, in which case you should contact Huawei technical support.
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