Midea VRF V4 Plus I Series User Manual

R410A DC Inverter V4 Plus 50Hz MCAC-VTSM-2014-04
114 Troubleshooting
Attached table 3: Commissioning and operating parameters of refrigerant system
Conditions 1: Make sure outdoor unit can detect all the indoor units, the quantity of indoor units display steadily and be equal
to actual quantity of installed indoor units.
Conditions 2: Make sure all the valves in outdoor unit are open, indoor units EXV have connected to indoor PCB.
Conditions 3: The ratio of connectable indoor units is 100%. When ambient temperature is high, operate the system in
cooling mode and set the temperature 17℃. When ambient temperature is low, operate the system in heating mode and set
the temperature 30℃. Then get the parameters after system running normally more than 30 minutes.
Outdoor unit cooling parameters table
Ambient temperature (T4)
℃
20-27
27-33
33-38
38-45
Discharge pressure (spot check)
MPa
2.1-2.3
2.8-3.1
3.3-3.5
3.7-3.9
Pressure of high pressure valve
MPa
1.8-2.0
2.4-2.7
2.8-3.0
3.2-3.5
Pressure of low pressure valve
MPa
0.7-0.9
0.8-1.0
1.0-1.2
1.2-1.4
Discharge temperature (spot check)
℃
50-65
70-85
70-90
80-90
DC Inverter compressor current (spot check)
A
4-5
6-7
7-8
9-11
Fixed compressor current (spot check)
A
6-7
8-9
9-11
11-12
Average temperature of evaporator outlet T2B
℃
8-9
12-15
16-17
20
Outdoor unit heating parameters table
Ambient temperature (T4)
℃
-15--5
-5-5
5-12
12-18
Discharge pressure (spot check)
MPa
2.0-2.2
2.2-2.7
3.0-3.1
2.6-2.7
Pressure of high pressure valve
MPa
1.7-1.8
1.8-2.4
2.6-2.8
2.1-2.4
Pressure of low pressure valve
MPa
2.0-2.2
2.2-2.6
3.0-3.1
2.5-2.7
Discharge temperature (spot check)
℃
50-70
60-70
60-85
60-70
DC Inverter compressor current (spot check)
A
5
5-6
6-8
5-6
Fixed compressor current (spot check)
A
6
6-7
9-10
8-9
Average temperature of condenser outlet T2
℃
33
33-40
46-50
39-41

Midea VRF V4 Plus I Series Specifications

General

Brand	Midea
Model	VRF V4 Plus I Series
Category	Air Conditioner
Language	English