11 of 286.2 Turning the Device On and Off► Turn the programmer on using the ON/OFF button.6.3 Checking Battery Charge and Reading LED IndicationsNOTICERisk of malfunction!Low battery charge (< 10 %) can affect functions of the device. The LED is lit redwhen the internal protective function is active.► Recharge the battery.If the device is operated outside of the permitted temperature range, an internal safetyfunction is activated. In this case, it is not possible to turn on the device or to charge it.► Store and operate device only in the permitted temperature range.► Check the battery charge using the LED indicators (② in Fig. 1, p. 9):The Device is Turned OnIndicator MeaningLED (green) The device is turned on/ready for operation, battery charge < 50 %.LED (orange) The device is turned on/ready for operation, battery charge < 50 %.► Recharge the battery (recommended).LED (red) The device is turned on/ready for operation, battery charge < 10 %.► Recharge the rechargeable battery.The Device is Turned Off (Charging Mode)Indicator MeaningLED off The device is turned off, the rechargeable battery is fully charged, batterycharge is 100 %.LED (green, flashing) The device is turned off, the rechargeable battery is being charged, batterycharge is > 80 %.LED (orange, flashing) The device is turned off, the rechargeable battery is being charged, batterycharge is < 80 %.Error IndicatorIndicator MeaningLED (red, flashing forapprox. 3 seconds)Too high a load is connected to the F-type plug-in socket. The device turnsoff.► Check the load on the F-type plug-in socket.