Service Message
When Service Message is enabled, a message of up to 10 ASCII characters is sent whenever the system detects that the service timer's limit has been reached. The service timer is reset at power-on, meaning that the service timer's limit is the amount of time since last reset. Service timer increments can be set in seconds or minutes.
Serial Cmd: <K409,status,service message,threshold,resolution> Default: 0 Options: 0 = Disabled 1 = Enabled