MCAC-VTSM-2014-09
R410A All DC Inverter Mini VRF
Troubleshooting 67
12~16 kW
PCB ports instruction
No.
Content
Port voltage
1 CN48
AC Power Input
AC
208-230V
2 CN24
Load output port
AC
208-230V
3 CN42
Load output port(single way valve)
AC
208-230V
4 CN26
Load output port
AC
208-230V
5 CN25
Load output port(4-way valve)
AC
208-230V
6 CN43
Load output port
AC
208-230V
7 CN23
Load output port(crankcase heating)
AC
208-230V
8 CN45
Load output port
AC
208-230V
9 CN44
Load output port
AC
208-230V
10 CN47
Load output port
AC
208-230V
11 CN46
Load output port(single way valve)
AC
208-230V
12 CN20
Online Programmable Port
DC 5V
13
Night Mode
/
14 CN11
Communication port between indoor units
DC 5V
15 CN10
Communication port between indoor unit and outdoor unit
DC 5V
16
Signal input port of AC input current
/
17 CN1
Detect port of radiation fin
DC 5V
18 CN6
Signal input port of system low pressure detect switch
/
19 CN7
Signal input port of system high pressure detect switch
/
20
Discharge temperature detect port of converter compressor
DC 5V
21 CN8
Detect port of ambient temperature
DC 5V
21 CN8
Detect port of condenser temperature
DC 5V
22 CN49
The port of PFC control
DC 12V
23 CN16
Communication port between mainboard 1 and mainboard 2
(mainboard 1 & 2 refers to the wiring diagram)
DC 5V
24 CN17
DC fan1 port
DC 380V
25 CN19
DC fan 2 port
DC 380V
26 CN18
Transformer voltage detect port
DC 380V
27 CN22
EEV driving port
DC 12V
28
EEPROM Port
DC 5V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
