Re: Blinking red LED; C&K MD's

["Bob La Londe" <onebikenut@xxxxxxxxx>]

"Jim Rojas" <jrojas@xxxxxxxxxxxx> wrote in message
news:9YzKo.375$VD1.195@xxxxxxxxxxxxxxx
> chasbo@xxxxxxxxx wrote:
>> Taking over old system containing C&K  DT435 and DT460S motion
>> detectors.  Installed NX8E and connected the MD's.
>>
>> PROBLEM:  Red LED's on all of the MD's blink continuously every second
>> or so.  Why? Pulsing continues long after power-up. Have powered
>> down/up several times.
>>
>> Yellow and green LED's cycle on and off as their respective
>> technologies are tripped, indicating to me that neither pir nor
>> microwave have gone to sleep. Red LED's light after yellow and green
>> LED's light, causing normal relay transfer.  All appears to be normal
>> except that after the MD's reset, the red LED continues to flash every
>> second or so, and never stop. System keypad green ready light
>> extinguishes when there is movement, and lights when the MD's reset.
>> indicating MD relays are functioning properly.
>>
>> I have read the 435 manual (do not have a 460S manual), but I did not
>> see an explanation for the pulsing red LED.  Red LED's continue
>> pulsing long after power-up.
>>
>> Brought two 640S to shop workbench.  Applied 12 volt battery, without
>> charger. No pulsing red LED, even during power-up.  All LED's operate
>> properly. Units perform perfectly.
>>
>> Anyone have an answer?
>
> All the C&K dualtec motions work the same. The red flashing LED means
> microwave failure.


And that is why you got the takeover.  They didn't want to pay their old
company for new sensors.