3914 Servicing Mode14.1. CS-RE18GKE CU-RE18GKE14.1.1. Auto Switch OperationThe below operations will be performed by pressing the “AUTO” switch.1. AUTO OPERATION MODEThe Auto operation will be activated immediately once the Auto Switch is pressed and release before 5 sec..2. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE)The Test Run operation will be activated if the Auto Switch is pressed continuously for more than 5 sec. to below 8 sec.. A“pep” sound will occur at the fifth sec., in order to identify the starting of Test Run operation.3. HEATING TRIAL OPERATIONPress the AUTO switch continuously for more than 8 sec. to below 11 sec. and release when a “pep pep” sound is occurred ateight sec. (However, a “pep” sound is occurred at fifth sec..) then press Remote controller “A/C Reset” button once. Remotecontroller signal will activate operation to force heating mode.4. REMOTE CONTROLLER RECEIVING SOUND ON/OFFThe ON/OFF of Remote controller receiving sound can be change over by the following steps:a. Press “AUTO” Switch continuously for more than 16 sec. to below 21 sec.A “pep”, “pep”, “pep”, “pep” sound will occur at the sixteenth sec..b. Press the “A/C Reset” button once. Remote controller signal will activate the Remote controller sound setting mode.c. Press the “Check” button once at Remote controller. A “pep” sound will occur.d. Press the “AUTO” switch once to select Remote controller receiving sound ON/OFF. A “pep” sound indicates receivingsound ON, and a “pep” sound indicates receiving sound OFF.14.1.2. Selecting The Wireless Remote Control Transmission CodeWhen there are more than one indoor units installed in the same room, it is possible to set different remote control receiving signalby modifying the jumpers inside Remote Control.