Huawei NetCol5000-A050 Quick Manual page 6

Do not use shielded cables as outdoor unit power cables.

Shielded cables are used as signal cables, and the shield layer must be reliably grounded.

Otherwise, device communication is affected.
Refrigerant Requirements
Do not use refrigerant of poor quality. Huawei will not be liable for any device damage caused
by using refrigerant of poor quality. Verify that the refrigerant is authentic in the following
ways:
1. Dial the refrigerant vendor's hotline to confirm the refrigerant authenticity.
2. Place the refrigerant tank indoors for 24 hours. Use a point thermometer to measure the
outer surface temperature of the refrigerant tank, and connect a pressure gauge to the tank
to measure the internal pressure. Find the saturation pressure corresponding to the
measured external surface temperature from the mapping table. If the deviation between
the saturation pressure and the measured internal pressure is greater than 0.2 MPa, the
refrigerant does not meet the requirements and needs to be replaced.
R410A Saturation Pressure (Surface Pressure)
Temperature Saturation
(ºC) Pressure (MPa)
10 0.99
11 1.02
12 1.05
13 1.09
14 1.12
15 1.16
16 1.19
17 1.23
1.27
18
Temperature Saturation
( º C) Pressure (MPa)
19
20
21
22
23
24
25
26
27
5
Temperature
(ºC)
1.31 28
1.35 29
1.39 30
1.43 31
1.47 32
1.51 33
1.56 34
35
1.60
36
1.65
Saturation
Pressure (MPa)
1.69
1.74
1.79
1.84
1.89
1.94
1.99
2.05
2.10