Why is the fan is not running after turning on certain models?

Some models control the fan based on internal temperature to extend its life time. For example, the Fan ON temperature for the S-240 series is ≧ 40C (RT1). If the internal temperature does not reach the preset value, the fan will remain still until receiving the start up signal.

Recent Articles

Safety Standard

What is RoHs?

RoHS is the acronym for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in th…

24/09/20

Technical Question

What is the input voltage of the ELG series?

The ELG series will work off an input voltage of 100-305Vac, however output de-rates to 70% below 200Vac. Please refer …

21/09/20

Technical Question

How to select the correct circuit breaker or fuse for MEAN WELL SPS?

At input side, there will be a large transient inrush current during the power on of an SPS. The inrush current is usua…

21/09/20

Technical Question

Would it be possible to reduce the noise of a fan?

Noise is directly related to the fan which is build into the power supply. Lowering the airflow of the fan means reduci…

21/09/20

Technical Question

During the operation of your power supply, there is some leakage current on the case. Is this normal? Will this leakage current hurt the human body?

Due to the requirement of EMI, there will be some Y capacitors between line and neutral to the FG (case) to improve EMC…

21/09/20

Technical Question

The output ground (GND) and frame ground (FG) is the same point in my system, can MEAN WELL's power supplies be used in such system?

Yes. Since our products are designed based on isolation concept, it will be no problem that the output ground (GND) and…

21/09/20

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