15• Earth resistance should meet the national standard requirement.• The yellow and green double color line of air conditioning unit is ground wire, do not move, splice or use it for any otherpurpose. Unit ground terminal cannot be connected with a self-tapping screw or risk electric shock.• This equipment must be properly grounded per local codes. Please take reliable measures to ensure that the groundconnecting is secure and all equipments is grounded.• The user's power supply must provide reliable grounding. Please don't connect the ground wire to the following places. (1)water pipe (2) gas pipe; (3) drainage pipe; (4) The other places where are unreliable.• The communication terminal block for indoor unit and outdoor unit AW042SSCHA&AW062SSCHA is marked as P/Q,and it is C1/C2 for outdoor unit AW082SNCHA&AW102SNCHA.• The device within the dotted box is optional and needs to be configured separately, which is not the standardconfiguration of the unit.Electric wiring and the applicationCommunication wiring figureStandardcontrollerOptionalcontrollerThe third partycontroller -2The third partycontroller -1I/O boardwifiCN38 CN6 CN7CN13CN3COMP/QP/QL N GND220-230V~supplyPowerLeakageprotectiondeviceCircuitbreakerNeutral wireLive wireEARTHEarth wireElectrical wiring diagramOutdoor unit Indoor unitIndoor unit