9(8) AT indicatorThe yellow LED flashes during auto-tuning or auto-reset.(9) TX/RX indicatorThe yellow LED flashes during Serial communication.(10) A1 indicatorWhen A1 output is on, the red LED lights.(11) A2/LA indicatorWhen A2 output is on, the red LED lights.(12) Increase key: Increases the numeric value.(13) Decrease key: Decreases the numeric value.(14) Mode key: Selects the setting mode or registers the set value.(By pressing the Mode key, the set value or selected value can be registered.)(15) OUT/OFF key• If OUT/OFF function is selected during OUT/OFF function selection, the control outputis turned on or off.Once the control output OFF function is enabled, the function cannot be released evenif the power to the instrument is turned OFF and turned ON again.To cancel the function, press the OUT/OFF key again for approx. 1 second.• If Auto/Manual control function is selected from OUT/OFF function selection, automaticcontrol is performed when the power to the controller is turned on. In this status, if theOUT/OFF key is pressed, the automatic control output is switched to manual controloutput and vice versa. However, this function can be switched only in the PV/SVdisplay mode.NoticeWhen setting the specifications and functions of this controller, connect terminals 2and 3 for power source first, then set them referring to “5. Setup” before performing “3.Mounting to the control panel” and “4. Wiring”.