AC Fan Coil Unit Two-pipe Wall-mounted Series
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Main PCB port description:
No. Bit No. Description Remarks
1 CN10 POWER: Mains input Standard
2 CN29 CAN: Cooling and heating 2-way/3-way valve null line Standard
3 CN14 ACN: Cooling and heating 2-way/3-way valve null line
Reserved
4 CN11
PUMP: Water pump output port Reserved (the
whole machine
cannot be realized)
5 CN6 VALVE-H: Heating 2-way/3-way valve live line Customized
6 CN7 VALVE-C: Cooling 2-way/3-way valve live line Standard
7 CN16
N: Null line output port for AC fan
Standard
L: Low fan speed output port for AC fan
M: Medium fan speed output port for AC fan
H: High fan speed output port for AC fan
HH: Super-high wind profile reserved port for AC fan
8 CN2 SWING: Swing motor port Standard
9 CN31 T2C: Refrigerating pipe temperature sensor port Standard
10 CN3 ON/OFF: Remote on/off port Standard
11 CN32 T1: Room temperature sensor port Standard
12 CN8 T2H: Heating pipe temperature sensor port Customized
13 CN18 WATER: Water level switch port
Reserved (the
whole machine
cannot be realized)
14 CN15 DISPLAY：Display panel docking port (nine pin) Standard
15 CN21 Dial code small board docking port Standard
16 CN20 E - side program burning port Standard
17 CN9 DEBUG: Main control program burn port Standard
18 CN22 PQE: Modbus communication port
19 CN23 XYE: Centralized control communication port Standard
20 CN27
TRANS OUT：0-10V value
powered linear transformer
secondary
Customized
21 CN25 0-10V valve control signal output Customized
22 CN12 ALARM: Fault alarm output Customized
23 CN19 Electrically heated N-wire control port 1 Customized
24 CN26 Electrically heated N-wire control port 2 Customized
25 CN13 Electrically heated L-wire control port 1 Customized
26 CN33 Electrically heated L-wire control port 2 Customized
27 CN28
TRANS IN: 0-10V valve
powered linear transformer
primary
Customized
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