Indoor Controller Board BAC02B

Introduction: BAC02B series product are VRF indoor unit control module, which communicates with the outdoor unit, then transfer the user setting mode/setting temperature and room temperature to the outdoor unit and receive the operating status from the outdoor unit.

Application: 1, Indoor unit, 2, Function board.
Features: 1, 1 way BLDC fan (connect to the fan power board);
2, 6 way temperature sensor wire;
3, 4 way failure input;
4, 7 way 5A relay;
5, 1 way RS485;
6, 1 way wired controller;
7, 2 way EXV;
8, 1 way 0-10VDC(connect to transfer slab)

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Indoor Unit

Introduction

Indoor unit BAC02B is designed to communicate with outdoor unit BAC01, then transfer the user setting mode, Setting temperature, room temperature to outdoor unit, and receive the running status from outdoor unit.

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Sensor Input Data- BAC02B
	Item	Port	Name	Value
	1	TH1	Tr:return temperature sensor	10K
	2	TH2	Tin:fan coil input sensor	10K
	3	TH3	Tou:fan coil outlet sensor	10K
	4	TH4-TH6	reservation

Input / Output ports Data- BAC02B
	Item	Port	Description	Remark
	1	CN485	RS485	Connect to outdoor unit
	2	CN12	Transformer initial port	Connect to transformer
	3	CN13	Transformer secondary port	Connect to transformer
	4	CN15	SLM FC264	HMI
	5	CN17	EEV port	Connect to EEV
	6	CN19	AC/DC indoor fan port	Adjustment RPM of DC FAN
	7	CN21	Hi fan speed output
	8	CN22	Medium fan speed output
	9	CN25	Power supply output	Connect to AC/DC fan
	10	CN27	PUMP output
	11	L	L	Power input 220vac
	12	N	N	Power input 220vac

ON/OFF Input Data- BAC02B
	Item	Port	Description	Remark
	1	CN6	Room card function	OCC function
	2	CN7	External fault input	NO-Fault NC-Normal
	3	CN9	Water switch	Control water switch