View single post by slychiu

Posted: Saturday Nov 14th, 2015 07:37 am

Joined:	Saturday Apr 29th, 2006
Location:	Singapore
Posts:	5498
Status:	Offline

The KP04A PCB has red and green LEDs which show the status of RS485 communications with Comfort (just like UCM)

Both RED and GREEN leds should be blinking steadily if communications with Comfort is working.

The GReen led flashes when the KP04A is polled by Comfort

The RED led flashes when the KP04A replies to Comfort.

Hence if Green LED is off, it means KP04A is not getting any communications from Comfort. This could be a connection or wiring problem, or a fault with Comfort.

If the green led is flashing but RED led is off, it means the Comfort is sending messages but KP04A is not replying. This could be an ID problem. Comfort may not be polling this ID. Do a scan for modules, and/or change the KP04A ID
Keypad IDs should be consecutive, eg 1,2,3,4 etc with no missing IDs.

This video shows the KP04A leds
https://www.youtube.com/watch?v=6w8LC59pkjU

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