Multiple RC commands

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Hi,
I have problem with Broadlink RM and Yamaha tuner. Tuner can be controlled only by remote control. In domoticz I have button that can switch on tuner. This works ok. If I want to choose source of signal I have problem to send command several times (i. e. I have to send command 3 times). I suppose that command is sent to fast so i need to have some delay between each command. I tried few solution for delay but it doesn't work. When I click button directly in Dimoticz - everything works correctly. Do you have any idea how to solve this problem?