Midea DC HRV Series - Page 9

DC Series HRV
10
DC Series HRV
Engineering Data Book
Table 6.1: HRV-200(300,400,500,800,1000,1500,2000)(B) Main PCB ports
Label in Figure 1.1
Code
Content
Port voltage
1
L,N
AC power input
220V AC
2
CN19
bypass port
220V AC
3
CN20
E-heat control
220V AC
4
CN15
Alarm
220V AC
5
CN14
Signal for ventilation fan
220V AC
6
CN24/CN27
DC fan
310 DC
7
CN8
P Q E communication port
2.5-2.7V DC
8
CN9
X Y E communication port (reserved)
2.5-2.7V DC
9
CN32
MODBUS communication port(reserved)
2.5-2.7V DC
10
CN33
D1 D2 E communication port
2.5-2.7V DC
11
CN7
X1 X2 communication port
18V DC
12
CN31
Inlet air pre-heat Signal
/
13
CN16
Force to exhaust air
/
14
CN26
ON/OFF
/
15
CN3
T1
5V DC
16
CN4
T4
5V DC
17
CN21
Pressure differential switch
/
18
CN10
27B Wired controller(reserved)
5V DC
19
CN28
CO
2
Sensor Box
5V DC
20
CN25
Program burning port
5V DC
Notes:
1. CN14: When the wire controller sets the ventilation fan ON, the port is closed, the external ventilation fan opens; When the wire controller sets the
ventilation fan OFF, the port is open, the external ventilation fan close.
2. CN16: The dry contact port is open, HRV turn on negative pressure mode. When the dip switch mode is inconsistent with the dry contact mode, the dry
contact mode will be on..
3. CN20, CN31: The dry contact port is open, HRV realize electrical auxiliary heat function. CN31 connects to third party signals.