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DSP-Controlled On-Line UPS OLED shows Bypass NO Output

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thannara123

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Any body know the following online UPS .
See the picture below


The LCD display shows input 230 volt frequency 50Hz

Buy No Output
Shows Bypass anybody there to be help me ?

some thing here **broken link removed**
 

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Cannot see unit pictures, any advice on model?
 

Your questions as usual lack of a better elaboration or at least less sloppiness: The attached picture is totally useless in the sense that it is impossible to read the silk legend on the top of the board. Another thing is that in the title says "bypass-no-output" but in the body of the post it is presumed you said "But-No-output" which are different scenarios. Also the link is dead, but you should already know.

Anyway, back to the question: What have you measured so far? Is there voltage at the input and not at the output? If the only device between both would be supposedly one of the Relays, have you measured it to know if it is switching and has electrical contact ?
 
Anyway, back to the question: What have you measured so far? Is there voltage at the input and not at the output? If the only device between both would be supposedly one of the Relays, have you measured it to know if it is switching and has electrical contact ?

The online UPS OLED shows AC input voltage 230volt ,The Mode is BYpass mode But there no Output . I will upload more details tomorrow
 

No need to upload more pictures, the only thing you have to do is to measure backwards from the output to input, checking where exactly the contact is interrupted. The by-pass operating mode is as simple as it could be, usually only one relay is what detaches the output from the input.
 
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