Wuhan Raycus Fiber Laser Technologies Co., LtdUser Guide RFL-A2000D-3000D Ver.1.016the laser and red guide laser. When laser emission is enabled, the red guide laser is off; when thelaser emission is disabled, the red guide laser is on.ALARM: Alarm indicator, indicates a fault condition, when the yellow LED illumines.STOP: Press it down to stop the laser immediately, turn it clockwise to release. But thelaser cannot start before it’s powered on (use the key switch) for a second time.INDICATION LAMPS: Laser state indicator, green indicates that power supply is on, redindicates that laser is emitting and orange indicates laser failure.4.2 Rear PanelFigure 4 shows the rear panel.Figure 4: Rear Panel ViewAIRCONDITIONERAC INPUTINTERFACEWATER