Midea V8 VRF Series User Manual

V8 VRF Indoor Units
5
Troubleshooting Guide
1.2 Four-way Cassette
Figure 1.2: Four-way Cassette main PCB ports
Table 1.3: Four-way Cassette main PCB ports
Label in
Figure 1.2
Code
Content
Port voltage
Note
1
CN1(L,N)
AC power input
220V AC
2
CN22
(ALARM,N,AC2)
AC power output used for customization function:
alarm/strong electric sterilization module
220V AC
Reserved
3
CN12(H-L)
CN29(H-N)
Reserved
220V AC
/
4
CN4
Program burning port(fan motor)
5V DC
[5]
Standard
5
CN55
Remote on/off switch connection
Reserved
6
CN21
T1 Ambient temperature sensor connection
3.3V DC
7
CN35
Humidity sensor connection
3.3V DC
Customized
8
CN18
Communication Switch Board
5V/12V DC
[5]
Customized
9
CN10(M1M2)
M1 M2 communication port(with ODU by HyperLink)
24V DC
Standard
10
CN6(X1X2,PQ)
X1 X2 communication port(with wire controller);
P Q communication port(with ODU by RS-485)
X1 X2:18V DC ;
P,E or Q,E: 2.5-2.7V DC
Standard
11
CN2(D1D2)
D1 D2 communication port(with Central controller)
2.5 - 2.7V DC
Standard
12
CN5
Water level port
3.3V DC
Reserved
13
CN190
DC Drainage pump port
12V DC
Reserved
14
CN30
Display panel connection
12V DC
Standard
15
CN8
EEV drive port
12V DC
[5]
Standard
16
CN11
T2 Temperature sensor connection
3.3V DC
Standard
17
CN15
T2B Temperature sensor connection
3.3V DC
Standard
18
CN80
T2A Temperature sensor connection
3.3V DC
Standard
19
CN-A
Sterilization module port
12V DC
Customized
20
CN16
TA Temperature sensor connection
3.3V DC
Reserved
21
CN25
Program burning port(indoor unit)
3.3V DC
Standard
22
CN100
Power supply for fan motor
Actual voltage
Standard
23
CN99
After-sale Kit communication port
12VDC
/
19
18
6
22
1
2
4
7
8
9
10
11
12
13
14
15
17
16
21
3
5
20
23

Midea V8 VRF Series Specifications

General

Brand	Midea
Model	V8 VRF Series
Category	Air Conditioner
Language	English