12 EnglishNo. 3 system When including BS unit 10-2 CONTROL BY 2 REMOTE CONTROLLERS (Con-trolling 1 indoor unit by 2 remote controllers)• When using 2 remote controllers, one must be set to “MAIN”and the other to “SUB”.MAIN/SUB CHANGEOVER(1) Insert a screwdriver into the recess between theupper and lower part of remote controller and, workingfrom the 2 positions, pry off the upper part (2 loca-tions).The remote controller PC board is attached to the upperpart of remote controller.(2) Turn the MAIN/SUB changeover switch on one of thetwo remote controller PC boards to “S”.(Leave the switch of the other remote controller set to “M”.)Wiring Method (See ‘‘9. ELECTRIC WIRING WORK’’)(3) Remove the control box lid.(4) Add remote controller 2 (SUB) to the terminal block forremote controller (P1 , P2 ) in the control box.(There is no polarity.)L NFF 1 2 FF 1 2 FF 1 2 FF 1 2IN/D IN/DOUT/D OUT/D1 PP 21F2N FL 1 2 T T1P 2PPower supplysingle phase50Hz 220-240Vor single phase60Hz 220VFig. 21Remote controller(option)Indoor unit ABS unitOutdoor unitUpper part ofremote controllerLower part ofremote controllerInsert the screwdriver here and gently work off theupper part of remote controller.Only one remote controllerneeds to be changed iffactory settings haveremained untouched.(Factory setting) SMSSMRemote controllerPC board1P 2P 1F 2F 1T 2TFORCEDOFFREMOTECONTRLTRANSMISSIONWIRINGRemotecontroller 1(MAIN)Remotecontroller 2(SUB)Remote controller wiringterminal block