View single post by slychiu
 Posted: Saturday Jun 24th, 2017 07:48 am
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Joined: Saturday Apr 29th, 2006
Location: Singapore
Posts: 4955

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Which green LED is not on in UCM 2?

The RDY LED turns  on if power is applied
The D10 Green Led flashes when it is polled by Ccmfort. Id 10 is offf, it means iit is not being polled. This is probably because The KA KB wires are not connected

The D9 red led flashes when the UCM replies ie communications is goood

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