Roland EV-1-WL Connection Manual page 71

Verify that the BT-DUAL unit's Bluetooth indicator
is blinking or lit.
If it is unlit, press the BT-DUAL pairing button to
make it blink or light.
2
In step 2 (p.69) of the procedure, could you
have tapped a model name shown on the
mobile device?
When you turn the Bluetooth switch on in step
2, "AC-22LX MIDI" might appear in the list of
"Available devices" but you should not tap it. If you
tapped it, clear the pairing, and try the procedure
again from step 1.