How to solve the bluetooth connection error?

Please follow the guide below if Bluetooth is not searched on iOS device.

1) Perform self test to check the printer is set as iOS mode

2) Check whether printer is connected to other iOS device. Printer is not able to be
found on your iOS device if it is connected to other iOS device. If STATUS LED blinks
when you press Feed button, it means that printer is connected to other iOS device.
You need to disconnect the connection to other iOS device, or turn on the printer
again while the paper cover is opened.

* Printer is automatically connected to last iOS device which was connected in iOS mode. But it does not make a connection to any device, if user turns it on while the paper cover of it is opened.