Ok, then you can check if the received pulses are mapped to key commands running
irw
Have a look at section “Examples” on http://www.lirc.org/html/irw.html how the ouput should look like. If you do not see a mapped key I guess the /etc/lirc/lircd.conf file is missing, damaged or not appropriate for your remote control.
Just in case: You can create your own lircd.conf running
irrecord -n -d /dev/lirc0 /path/<remote_name>.conf
If you should create your own lircd.conf you may copy it to /data/plugins/system_controller/ir_controller/configurations/<remote_name>/ so the IR Remote Controller plugin can install it to /etc/lirc/ when you choose the remote through the UI.
To start lirc it should be sufficient to run
systemctl start lirc.service
But this should happen by enabling the IR Remote Controller plugin (which I assume you have still installed).