External effecter does not work.

Please check the following four possible causes.

1. Is the external effecter properly connected to the SEND/RETURN terminal? Or, is the mobile device properly connected to the USB port?
For proper connections, see "Connections" in the Operating Instructions.

You can download the Operating Instructions at this page.

2. Did you select the channel you would like to SEND by the BEAT FX effect channel selector switch?

3. Is the ON/OFF switch of SEND/RETURN turned on (blink)?

4. Are the SEND/RETURN selector switch and the RETURN TYPE selector switch set correctly? (See Note)

Note: Please refer to the following FAQ.
Installation/Connections > What are the specifications of the SEND/RETURN terminals?