Midea Mini VRF Service Manual

MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF
Troubleshooting 59
1. PCB ports instructions
PCB ports instruction
No.
Content
Port voltage
1
Inspection port for inverter module voltage
DC 540V,DC 15V
2
Mutual inductor for compressor DC current
In dynamic change
3 CN201
Activation port of inverter module
The left the first pin:DC
3.3V
4 CN19
Port of DC fan 1
The left the first pin:DC
310V,the third pin:DC 15V
5 CN17
Port of DC fan 2
The left the first pin:DC
310V,the third pin:DC 15V
6 CN65
Loading output terminal(4-way valve control)
AC 220V
7 CN41
Power supply for relay
AC 220V
8 CN22
EXV activation port
The left the first pin:DC
12V
9
Input current of the mutual inductor at the inverter compressor
In dynamic change
10 CN15
Reserve
---
11
SW6 For setting models
---
12
SW7 net address code automatically
---
13
SW8 Reserved
---
14 CN11
Internet group control of indoor units
DC 2.5-2.7V
15 CN10
Communication between indoor and outdoor units
DC 2.5-2.7V
16 CN9
Inspection port for outdoor ambient temp. and condenser coil temp.
DC 0-5V
17 CN8
Air discharge temp. sensed port at the compressor
DC 0-5V
18 CN6
Input port for system pressure inspection
DC 0-5V
19 CN250
Input port for power supply of the main control board
AC 220V
20 CN68
Loading output terminal(solenoid valve SV5 control)
AC 220V
21 CN66
Loading output terminal(crankcase heating control)
AC 220V
22 CN67
Loading output terminal (Delay control of DC power)
AC 220V
23 CN64
Loading output terminal(solenoid valve SV6 control)
AC 220V
24 CN67
Reserved
----
1
2 3 4 5 6 7
8
9
10
11
12
13
14
15
1617
18
19
20
21
22
23
24

Midea Mini VRF Specifications

General

Brand	Midea
Model	Mini VRF
Category	Air Conditioner
Language	English