Daikin VRV 5-S RXYSA4A7V1B User manual

Installation and operation manual
VRV 5-S system air conditioner English
Installation and operation manual
VRV 5-S system air conditioner
RXYSA4A7V1B
RXYSA5A7V1B
RXYSA6A7V1B
RXYSA4A7Y1B
RXYSA5A7Y1B
RXYSA6A7Y1B

A~E a b c d e eBeD
a
b
c
d
e
eB
eD
A
B
C
D
E
B
HU
HD
H
B — ≥100
A, B, C — ≥100
(1)
≥100 ≥100
B, E — ≥100 ≥1000 ≤500
A, B, C, E — ≥150
(1)
≥150 ≥150 ≥1000 ≤500
D — ≥500
D, E — ≥500 ≥1000 ≤500
B, D ≥100
≥100
≥500
≥500
B, D, E
1+2
1
HD
>H
U
HD>HU
HB≤½HU≥250 ≥750 ≥1000 ≤500
½HU<HB≤HU≥250 ≥1000 ≥1000 ≤500
HB>HU
HD≤HU
HD
>H
U
HD≤HU
HD≤HU
HD≤½HU≥100 ≥1000 ≥1000 ≤500
½HU<HD≤HU
HD≤HUHD≤½HU
½HU<HD≤HU
≥200 ≥1000 ≥1000 ≤500
HD>HU
A, B, C — ≥200
(1)
≥300 ≥1000
A, B, C, E — ≥200
(1)
≥300 ≥1000 ≥1000 ≤500
D — ≥1000
D, E — ≥1000 ≥1000 ≤500
B, D HD>HU≥300 ≥1000
≥250 ≥1500
≥300 ≥1500
B, D, E HB≤½HU≥300 ≥1000 ≥1000 ≤500
½HU<HB≤HU≥300 ≥1250 ≥1000 ≤500
HB>HU
HD≤½HU≥250 ≥1500 ≥1000 ≤500
½HU<HD≤HU≥300 ≥1500 ≥1000 ≤500
HD>HU
HBHDHU
(mm)
HU
a
b
c
d
e
eB
eD
A
B
C
D
E
HB
HD
≥ 100(1)
≥ 100(1)
1
b (mm)
≥1000
≥200
≥2000
≥100
≥3000
≥1500
b
≥ 100(1)
H
B
H
U
≥ 100(1)
≥ 100(1)
HB≤½HUb≥250
½HU<HB≤HUb≥300
HB>HU
HBHU
≥ 100(1)
≥ 100(1)
≥ 100(1)
2
A1
A2
≥500
≥1000
A2
≥500
≥300
≥ 100(1)
≥ 100(1)
B1
A2
B2
≥100
≥300
B2
≥100
≥1000
B2
≥ 100(1) ≥ 100(1)
3

5 25 30 35 40 45 50 55 60 70 75 80 85 90 95 100 65201510
A [m
2
]
m [kg]
0
5
10
15
20
25
30
35
40
5 25 30 35 40 45 50 55 60 70 75 80 85 90 95
100 65201510
A [m
2
]
All other floors
(a) Lowest underground floor (b)
a
2.2 m
(c)
a
1.8 m
(c)
a
4.5
m
(c)
a
4.0
m
(c)
a
3.5
m
(c)
a
3.0
m
(c)
a
2.5
m
(c)
a
1.8
m+2.2
m
(c)
b
2.2 m
(c)
b
1.8 m
(c)
b
4.5
m
(c)
b
4.0
m
(c)
b
3.5
m
(c)
b
3.0
m
(c)
b
2.5
m
(c)
b
1.8
m+2.2
m
(c)
m [kg]
Lowest underground floor
(b) -
Effective installation height (c)
A
[m²]
All other floors
(a) -
Effective installation height (c)
Lowest underground floor
(b) -
Effective installation height (c)
All other floors
(a) -
Effective installation height (c)
5
1.8 m 2.2 m 2.5 m 3.0 m 3.5 m 4.0 m 4.5 m 1.8 m 2.2 m 2.5 m 3.0 m 3.5 m 4.0 m 4.5 m
m [kg]
A
[m²]
1.8 m 2.2 m 2.5 m 3.0 m 3.5 m 4.0 m 4.5 m 1.8 m 2.2 m 2.5 m 3.0 m 3.5 m 4.0 m 4.5 m
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
2.1
2.5
3.5
4.7
6.0
7.2
8.3
9.0
9.4
9.7
10.1
10.4
10.7
11.1
11.4
11.8
12.1
12.4
12.8
13.1
13.4
13.8
14.1
14.5
14.8
15.1
15.5
15.8
16.1
16.5
16.8
17.2
17.5
17.8
18.2
18.5
18.8
19.2
19.5
19.9
20.2
20.5
20.9
21.2
21.5
21.9
22.2
22.6
2.5
3.0
3.5
4.7
6.0
7.2
8.3
9.0
9.4
9.7
10.1
10.4
10.7
11.1
11.4
11.8
12.1
12.4
12.8
13.1
13.4
13.8
14.1
14.5
14.8
15.1
15.5
15.8
16.1
16.5
16.8
17.2
17.5
17.8
18.2
18.5
18.8
19.2
19.5
19.9
20.2
20.5
20.9
21.2
21.5
21.9
22.2
22.6
2.9
3.5
4.7
6.0
6.8
7.5
8.3
9.0
9.8
10.4
10.8
11.1
11.5
11.9
12.3
12.7
13.1
13.4
13.8
14.2
14.6
15.0
15.4
15.7
16.1
16.5
16.9
17.3
17.7
18.0
18.4
18.8
19.2
19.6
20.0
20.4
20.7
21.1
21.5
21.9
22.3
22.7
23.0
23.4
23.8
24.2
24.6
25.0
3.5
4.9
6.3
7.2
8.1
9.0
9.9
10.5
11.0
11.4
11.9
12.4
12.8
13.3
13.7
14.2
14.7
15.1
15.6
16.1
16.5
17.0
17.4
17.9
18.4
18.8
19.3
19.7
20.2
20.7
21.1
21.6
22.0
22.5
23.0
23.4
23.9
24.3
24.8
25.3
25.7
26.2
26.6
27.1
27.6
28.0
28.5
28.9
4.7
6.3
7.4
8.4
9.5
10.4
10.9
11.4
12.0
12.5
13.1
13.6
14.1
14.7
15.2
15.7
16.3
16.8
17.4
17.9
18.4
19.0
19.5
20.0
20.6
21.1
21.7
22.2
22.7
23.3
23.8
24.3
24.9
25.4
26.0
26.5
27.0
27.6
28.1
28.6
29.2
29.7
30.3
30.8
31.3
31.9
32.4
32.9
6.0
7.2
8.4
9.6
10.5
11.1
11.8
12.4
13.0
13.6
14.2
14.8
15.4
16.1
16.7
17.3
17.9
18.5
19.1
19.7
20.4
21.0
21.6
22.2
22.8
23.4
24.0
24.6
25.3
25.9
26.5
27.1
27.7
28.3
28.9
29.6
30.2
30.8
31.4
32.0
32.6
33.2
33.9
34.5
35.1
35.7
36.3
36.9
6.8
8.1
9.5
10.5
11.2
11.9
12.6
13.3
14.0
14.7
15.4
16.1
16.7
17.4
18.1
18.8
19.5
20.2
20.9
21.6
22.3
23.0
23.7
24.3
25.0
25.7
26.4
27.1
27.8
28.5
29.2
29.9
30.6
31.2
31.9
32.6
33.3
34.0
34.7
35.4
36.1
36.8
37.5
38.2
38.8
39.5
40.2
40.9
2.1
2.5
2.7
2.9
3.1
3.4
3.7
4.1
4.4
4.7
5.1
5.4
5.7
6.1
6.4
6.8
7.1
7.4
7.8
8.1
8.4
8.8
9.1
9.5
9.8
10.1
10.5
10.8
11.1
11.5
11.8
12.2
12.5
12.8
13.2
13.5
13.8
14.2
14.5
14.9
15.2
15.5
15.9
16.2
16.5
16.9
17.2
17.6
2.5
3.0
3.3
3.6
3.8
4.0
4.2
4.4
4.5
4.7
5.1
5.4
5.7
6.1
6.4
6.8
7.1
7.4
7.8
8.1
8.4
8.8
9.1
9.5
9.8
10.1
10.5
10.8
11.1
11.5
11.8
12.2
12.5
12.8
13.2
13.5
13.8
14.2
14.5
14.9
15.2
15.5
15.9
16.2
16.5
16.9
17.2
17.6
2.9
3.5
3.8
4.0
4.3
4.5
4.7
4.9
5.1
5.4
5.8
6.1
6.5
6.9
7.3
7.7
8.1
8.4
8.8
9.2
9.6
10.0
10.4
10.7
11.1
11.5
11.9
12.3
12.7
13.0
13.4
13.8
14.2
14.6
15.0
15.4
15.7
16.1
16.5
16.9
17.3
17.7
18.0
18.4
18.8
19.2
19.6
20.0
3.5
4.1
4.5
4.8
5.1
5.4
5.7
5.9
6.2
6.4
6.9
7.4
7.8
8.3
8.7
9.2
9.7
10.1
10.6
11.1
11.5
12.0
12.4
12.9
13.4
13.8
14.3
14.7
15.2
15.7
16.1
16.6
17.0
17.5
18.0
18.4
18.9
19.3
19.8
20.3
20.7
21.2
21.6
22.1
22.6
23.0
23.5
23.9
4.0
4.8
5.3
5.7
6.0
6.3
6.6
6.9
7.2
7.5
8.1
8.6
9.1
9.7
10.2
10.7
11.3
11.8
12.4
12.9
13.4
14.0
14.5
15.0
15.6
16.1
16.7
17.2
17.7
18.3
18.8
19.3
19.9
20.4
21.0
21.5
22.0
22.6
23.1
23.6
24.2
24.7
25.3
25.8
26.3
26.9
27.4
27.9
4.6
5.5
6.0
6.5
6.9
7.2
7.6
7.9
8.2
8.6
9.2
9.8
10.4
11.1
11.7
12.3
12.9
13.5
14.1
14.7
15.4
16.0
16.6
17.2
17.8
18.4
19.0
19.6
20.3
20.9
21.5
22.1
22.7
23.3
23.9
24.6
25.2
25.8
26.4
27.0
27.6
28.2
28.9
29.5
30.1
30.7
31.3
31.9
5.2
6.2
6.8
7.3
7.7
8.1
8.5
8.9
9.3
9.7
10.4
11.1
11.7
12.4
13.1
13.8
14.5
15.2
15.9
16.6
17.3
18.0
18.7
19.3
20.0
20.7
21.4
22.1
22.8
23.5
24.2
24.9
25.6
26.2
26.9
27.6
28.3
29.0
29.7
30.4
31.1
31.8
32.5
33.2
33.8
34.5
35.2
35.9
22.9 22.9 25.3 29.4 33.5 37.5 41.6 17.9 17.9 20.3 24.4 28.5 32.5 36.6
23.2 23.2 25.7 29.9 34.0 38.2 42.3 18.2 18.2 20.7 24.9 29.0 33.2 37.3
23.6 23.6 26.1 30.3 34.5 38.8 43.0 18.6 18.6 21.1 25.3 29.5 33.8 38.0
23.9 23.9 26.5 30.8 35.1 39.4 43.7 18.9 18.9 21.5 25.8 30.1 34.4 38.7
24.2 24.2 26.9 31.2 35.6 40.0 44.4 19.2 19.2 21.9 26.2 30.6 35.0 39.4
24.6 24.6 27.3 31.7 36.2 40.6 45.1 19.6 19.6 22.3 26.7 31.2 35.6 40.1
24.9 24.9 27.6 32.2 36.7 41.2 45.8 19.9 19.9 22.6 27.2 31.7 36.2 40.8
25.3 25.3 28.0 32.6 37.2 41.8 46.4 20.3 20.3 23.0 27.6 32.2 36.8 41.4
25.6 25.6 28.4 33.1 37.8 42.5 47.1 20.6 20.6 23.4 28.1 32.8 37.5 42.1
25.9 25.9 28.8 33.6 38.3 43.1 47.8 20.9 20.9 23.8 28.6 33.3 38.1 42.8
26.3 26.3 29.2 34.0 38.8 43.7 48.5 21.3 21.3 24.2 29.0 33.8 38.7 43.5
26.6 26.6 29.6 34.5 39.4 44.3 49.2 21.6 21.6 24.6 29.5 34.4 39.3 44.2
27.0 27.0 29.9 34.9 39.9 44.9 49.9 22.0 22.0 24.9 29.9 34.9 39.9 44.9
27.3 27.3 30.3 35.4 40.5 45.5 50.6 22.3 22.3 25.3 30.4 35.5 40.5 45.6
27.6 27.6 30.7 35.9 41.0 46.1 51.3 22.6 22.6 25.7 30.9 36.0 41.1 46.3
28.0 28.0 31.1 36.3 41.5 46.8 52.0 23.0 23.0 26.1 31.3 36.5 41.8 47.0
28.3 28.3 31.5 36.8 42.1 47.4 52.7 23.3 23.3 26.5 31.8 37.1 42.4 47.7
28.6 28.6 31.9 37.2 42.6 48.0 53.4 23.6 23.6 26.9 32.2 37.6 43.0 48.4
29.0 29.0 32.2 37.7 43.1 48.6 54.0 24.0 24.0 27.2 32.7 38.1 43.6 49.0
29.3 29.3 32.6 38.2 43.7 49.2 54.7 24.3 24.3 27.6 33.2 38.7 44.2 49.7
29.7 29.7 33.0 38.6 44.2 49.8 55.4 24.7 24.7 28.0 33.6 39.2 44.8 50.4
30.0 30.0 33.4 39.1 44.8 50.4 56.1 25.0 25.0 28.4 34.1 39.8 45.4 51.1
30.3 30.3 33.8 39.5 45.3 51.1 56.8 25.3 25.3 28.8 34.5 40.3 46.1 51.8
30.7 30.7 34.2 40.0 45.8 51.7 57.5 25.7 25.7 29.2 35.0 40.8 46.7 52.5
31.0 31.0 34.5 40.5 46.4 52.3 58.2 26.0 26.0 29.5 35.5 41.4 47.3 53.2
31.3 31.3 34.9 40.9 46.9 52.9 58.9 26.3 26.3 29.9 35.9 41.9 47.9 53.9
31.7 31.7 35.3 41.4 47.4 53.5 59.6 26.7 26.7 30.3 36.4 42.4 48.5 54.6
32.0 32.0 35.7 41.8 48.0 54.1 60.3 27.0 27.0 30.7 36.8 43.0 49.1 55.3
32.4 32.4 36.1 42.3 48.5 54.7 61.0 27.4 27.4 31.1 37.3 43.5 49.7 56.0
32.7 32.7 36.5 42.8 49.1 55.3 61.6 27.7 27.7 31.5 37.8 44.1 50.3 56.6
33.0 33.0 36.9 43.2 49.6 56.0 62.3 28.0 28.0 31.9 38.2 44.6 51.0 57.3
33.4 33.4 37.2 43.7 50.1 56.6 63.0 28.4 28.4 32.2 38.7 45.1 51.6 58.0
33.7 33.7 37.6 44.1 50.7 57.2 63.7 28.7 28.7 32.6 39.1 45.7 52.2 58.7
34.0 34.0 38.0 44.6 51.2 57.8 64.4 29.0 29.0 33.0 39.6 46.2 52.8 59.4
34.4 34.4 38.4 45.1 51.7 58.4 65.1 29.4 29.4 33.4 40.1 46.7 53.4 60.1
34.7 34.7 38.8 45.5 52.3 59.0 65.8 29.7 29.7 33.8 40.5 47.3 54.0 60.8
35.1 35.1 39.2 46.0 52.8 59.6 66.5 30.1 30.1 34.2 41.0 47.8 54.6 61.5
35.4 35.4 39.5 46.4 53.4 60.3 67.2 30.4 30.4 34.5 41.4 48.4 55.3 62.2
35.7 35.7 39.9 46.9 53.9 60.9 67.9 30.7 30.7 34.9 41.9 48.9 55.9 62.9
36.1 36.1 40.3 47.4 54.4 61.5 68.5 31.1 31.1 35.3 42.4 49.4 56.5 63.5
36.4 36.4 40.7 47.8 55.0 62.1 69.2 31.4 31.4 35.7 42.8 50.0 57.1 64.2
36.7 36.7 41.1 48.3 55.5 62.7 69.9 31.7 31.7 36.1 43.3 50.5 57.7 64.9
37.1 37.1 41.5 48.7 56.0 63.3 70.6 32.1 32.1 36.5 43.7 51.0 58.3 65.6
37.4 37.4 41.8 49.2 56.6 63.9 71.3 32.4 32.4 36.8 44.2 51.6 58.9 66.3
37.8 37.8 42.2 49.7 57.1 64.6 72.0 32.8 32.8 37.2 44.7 52.1 59.6 67.0
38.1 38.1 42.6 50.1 57.7 65.2 72.7 33.1 33.1 37.6 45.1 52.7 60.2 67.7
38.4 38.4 43.0 50.6 58.2 65.8 73.4 33.4 33.4 38.0 45.6 53.2 60.8 68.4
38.8 38.8 43.4 51.1 58.7 66.4 74.1 33.8 33.8 38.4 46.1 53.7 61.4 69.1
4

Table of contents
Installation and operation manual
4
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
Table of contents
1 About this document 5
2 Specific installer safety instructions 5
2.1 Instructions for equipment using R32 refrigerant ...................... 6
For the user 7
3 User safety instructions 7
3.1 General...................................................................................... 7
3.2 Instructions for safe operation ................................................... 8
4 About the system 9
4.1 System layout............................................................................ 10
5 User interface 10
6 Operation 10
6.1 Operation range ........................................................................ 10
6.2 Operating the system ................................................................ 10
6.2.1 About operating the system ........................................ 10
6.2.2 About cooling, heating, fan only, and automatic
operation ..................................................................... 10
6.2.3 About the heating operation........................................ 10
6.2.4 To operate the system (WITHOUT cool/heat
changeover remote control switch) ............................. 10
6.2.5 To operate the system (WITH cool/heat changeover
remote control switch)................................................. 11
6.3 Using the dry program............................................................... 11
6.3.1 About the dry program ................................................ 11
6.3.2 To use the dry program (WITHOUT cool/heat
changeover remote control switch) ............................. 11
6.3.3 To use the dry program (WITH cool/heat changeover
remote control switch)................................................. 11
6.4 Adjusting the air flow direction................................................... 11
6.4.1 About the air flow flap ................................................. 11
6.5 Setting the master user interface .............................................. 12
6.5.1 About setting the master user interface ...................... 12
6.5.2 To designate the master user interface ...................... 12
7 Maintenance and service 12
7.1 About the refrigerant.................................................................. 12
7.2 After-sales service and warranty ............................................... 13
7.2.1 Warranty period .......................................................... 13
7.2.2 Recommended maintenance and inspection.............. 13
8 Troubleshooting 13
8.1 Error codes: Overview............................................................... 14
8.2 Symptoms that are NOT system malfunctions .......................... 15
8.2.1 Symptom: The system does not operate .................... 15
8.2.2 Symptom: Cool/Heat cannot be changed over ........... 15
8.2.3 Symptom: Fan operation is possible, but cooling and
heating do not work..................................................... 15
8.2.4 Symptom: The fan speed does not correspond to the
setting ......................................................................... 15
8.2.5 Symptom: The fan direction does not correspond to
the setting ................................................................... 15
8.2.6 Symptom: White mist comes out of a unit (Indoor
unit) ............................................................................. 15
8.2.7 Symptom: White mist comes out of a unit (Indoor
unit, outdoor unit) ........................................................ 15
8.2.8 Symptom: The user interface reads "U4" or "U5" and
stops, but then restarts after a few minutes ................ 15
8.2.9 Symptom: Noise of air conditioners (Indoor unit)........ 15
8.2.10 Symptom: Noise of air conditioners (Indoor unit,
outdoor unit)................................................................ 15
8.2.11 Symptom: Noise of air conditioners (Outdoor unit) ..... 15
8.2.12 Symptom: Dust comes out of the unit ......................... 15
8.2.13 Symptom: The units can give off odours..................... 15
8.2.14 Symptom: The outdoor unit fan does not spin ............. 16
8.2.15 Symptom: The compressor in the outdoor unit does
not stop after a short heating operation ....................... 16
8.2.16 Symptom: The inside of an outdoor unit is warm
even when the unit has stopped .................................. 16
8.2.17 Symptom: Hot air can be felt when the indoor unit is
stopped ........................................................................ 16
9 Relocation 16
10 Disposal 16
For the installer 16
11 About the box 16
11.1 Outdoor unit................................................................................ 16
11.1.1 To unpack the outdoor unit .......................................... 16
11.1.2 To handle the outdoor unit ........................................... 16
11.1.3 To remove the accessories from the outdoor unit........ 17
12 Special requirements for R32 units 17
12.1 Installation space requirements.................................................. 17
12.2 System layout requirements ....................................................... 17
12.3 To determine the charge limit ..................................................... 19
13 Unit installation 22
13.1 Preparing the installation site ..................................................... 22
13.1.1 Installation site requirements of the outdoor unit ......... 22
13.1.2 Additional installation site requirements of the
outdoor unit in cold climates ........................................ 22
13.2 Opening and closing the unit...................................................... 23
13.2.1 To open the outdoor unit.............................................. 23
13.2.2 To close the outdoor unit ............................................. 23
13.3 Mounting the outdoor unit........................................................... 23
13.3.1 To provide the installation structure ............................. 23
13.3.2 To install the outdoor unit............................................. 23
13.3.3 To provide drainage ..................................................... 23
13.3.4 To prevent the outdoor unit from falling over ............... 24
14 Piping installation 24
14.1 Preparing refrigerant piping ........................................................ 24
14.1.1 Refrigerant piping requirements................................... 24
14.1.2 Refrigerant piping material........................................... 24
14.1.3 To select the piping size .............................................. 24
14.1.4 To select refrigerant branch kits................................... 25
14.2 Connecting the refrigerant piping ............................................... 25
14.2.1 To remove the spun pipes ........................................... 25
14.2.2 To connect the refrigerant piping to the outdoor unit ... 26
14.2.3 To connect the refrigerant branching kit ...................... 27
14.3 Checking the refrigerant piping .................................................. 27
14.3.1 Checking refrigerant piping: Setup............................... 27
14.3.2 To perform a leak test .................................................. 27
14.3.3 To perform vacuum drying ........................................... 28
14.3.4 To check for leaks after charging refrigerant ............... 28
15 Charging refrigerant 28
15.1 Precautions when charging refrigerant....................................... 28
15.2 To determine the additional refrigerant amount ......................... 28
15.3 To charge refrigerant .................................................................. 29
15.4 Error codes when charging refrigerant ....................................... 30
15.5 To fix the fluorinated greenhouse gases label............................ 30
15.6 To check for refrigerant leaks after charging .............................. 30
16 Electrical installation 30
16.1 About electrical compliance........................................................ 30
16.2 Specifications of standard wiring components ........................... 31
16.3 To connect the electrical wiring to the outdoor unit .................... 31
16.4 To connect the external outputs ................................................. 32
16.5 To connect the cool/heat selector switch option......................... 33
16.6 To check the insulation resistance of the compressor ............... 34

1 About this document
Installation and operation manual
5
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4P600329-1E – 2023.02
17 Finishing the outdoor unit installation 34
17.1 To insulate the refrigerant piping............................................... 34
18 Configuration 35
18.1 Making field settings .................................................................. 35
18.1.1 About making field settings ......................................... 35
18.1.2 To access the field setting components...................... 35
18.1.3 Field setting components ............................................ 35
18.1.4 To access mode 1 or 2 ............................................... 36
18.1.5 To use mode 1 ............................................................ 36
18.1.6 To use mode 2 ............................................................ 36
18.1.7 Mode 1: monitoring settings........................................ 37
18.1.8 Mode 2: field settings .................................................. 37
19 Commissioning 37
19.1 Precautions when commissioning ............................................. 38
19.2 Checklist before commissioning ................................................ 38
19.3 Checklist during commissioning ................................................ 38
19.4 About the test run ...................................................................... 38
19.5 To perform a test run (7-segment display) ................................ 39
19.6 Correcting after abnormal completion of the test run ................ 39
20 Troubleshooting 39
20.1 Solving problems based on error codes.................................... 39
20.1.1 Error codes: Overview ................................................ 39
20.2 Refrigerant leak detection system ............................................. 41
21 Disposal 41
22 Technical data 42
22.1 Service space: Outdoor unit ...................................................... 42
22.2 Piping diagram: Outdoor unit..................................................... 43
22.3 Wiring diagram: Outdoor unit .................................................... 43
1 About this document
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set
consists of:
▪General safety precautions:
▪ Safety instructions that you must read before installing
▪ Format: paper (in the box of the outdoor unit)
▪Outdoor unit installation and operation manual:
▪ Installation and operation instructions
▪ Format: paper (in the box of the outdoor unit)
▪Installer and user reference guide:
▪ Preparation of the installation, reference data,…
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ Format: Digital files on https://www.daikin.eu. Use the search
function to find your model.
Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your dealer.
The original instructions are written in English. All other languages
are translations of the original instructions.
2 Specific installer safety
instructions
Always observe the following safety instructions and regulations.
Installation site (see "13.1Preparing the installation
site"[422])
WARNING
Follow the service space dimensions in this manual for
correct installation of the unit. See "22.1 Service space:
Outdoor unit"[442].
WARNING
The appliance shall be stored in a room without
continuously operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater).
CAUTION
Appliance NOT accessible to the general public, install it in
a secured area, protected from easy access.
This unit, both indoor and outdoor, is suitable for
installation in a commercial and light industrial
environment.
Opening and closing the unit (see "13.2Opening and closing
the unit"[423])
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
Mounting the outdoor unit (see "13.3Mounting the outdoor
unit"[423])
WARNING
Fixing method of the outdoor unit MUST be in accordance
with the instructions from this manual. See "13.3Mounting
the outdoor unit"[423].
Connecting the refrigerant piping (see "14.2Connecting the
refrigerant piping"[425])
WARNING
Any gas or oil remaining inside the stop valve may blow off
the spun piping.
If these instructions are NOT followed correctly it may
result in property damage or personal injury, which may be
serious depending on the circumstances.
WARNING
NEVER remove the spun piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the spun piping.
CAUTION
Do NOT vent gases into the atmosphere.

2 Specific installer safety instructions
Installation and operation manual
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WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
NOTICE
NEVER install a drier to this unit to guarantee its lifetime.
The drying material may dissolve and damage the system.
Charging refrigerant (see "15Charging refrigerant"[428])
WARNING
▪ The refrigerant inside the unit is mildly flammable, but
normally does NOT leak. If the refrigerant leaks in the
room and comes in contact with fire from a burner, a
heater, or a cooker, this may result in fire, or the
formation of a harmful gas.
▪ Turn OFF any combustible heating devices, ventilate
the room, and contact the dealer where you purchased
the unit.
▪ Do NOT use the unit until a service person confirms
that the part from which the refrigerant leaked has been
repaired.
WARNING
Charging of refrigerant MUST be in accordance with the
instructions from this manual. See "15 Charging
refrigerant"[428].
WARNING
▪ Only use R32 as refrigerant. Other substances may
cause explosions and accidents.
▪ R32 contains fluorinated greenhouse gases. Its global
warming potential (GWP) value is 675. Do NOT vent
these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.
Electrical installation (see "16Electrical installation"[430])
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
national wiring regulation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction MUST comply with the applicable
legislation.
WARNING
Electrical wiring connection method MUST be in
accordance with the instructions from this manual. See
"16Electrical installation"[430].
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
▪ If the power supply has a missing or wrong N-phase,
equipment might break down.
▪ Establish proper earthing. Do NOT earth the unit to a
utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shock.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the
cables do NOT come in contact with sharp edges or
piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, extension cords, or
connections from a star system. They can cause
overheating, electrical shock or fire.
▪ Do NOT install a phase advancing capacitor, because
this unit is equipped with an inverter. A phase
advancing capacitor will reduce performance and may
cause accidents.
CAUTION
Do NOT push or place redundant cable length into the unit.
Commissioning (see "19Commissioning"[437])
CAUTION
Do NOT perform the test operation while working on
the indoor units.
When performing the test operation, NOT ONLY the
outdoor unit, but the connected indoor unit will operate as
well. Working on an indoor unit while performing a test
operation is dangerous.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. Do NOT remove the fan guard. When the
fan is rotating at high speed, it will cause injury.
Troubleshooting (see "20Troubleshooting"[439])
WARNING
▪ When carrying out an inspection on the switch box of
the unit, ALWAYS make sure that the unit is
disconnected from the mains. Turn off the respective
circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER shunt safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
2.1 Instructions for equipment using
R32 refrigerant
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.

3 User safety instructions
Installation and operation manual
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4P600329-1E – 2023.02
WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Do NOT use cleaning materials or means to accelerate
the defrosting process other than those recommended
by the manufacturer.
▪ Be aware that the refrigerant inside the system is
odourless.
WARNING
The appliance shall be stored so as to prevent mechanical
damage and in a well-ventilated room without continuously
operating ignition sources (example: open flames, an
operating gas appliance or an operating electric heater)
and have a room size as specified below.
WARNING
Make sure installation, servicing, maintenance and repair
comply with instructions from Daikin and with applicable
legislation and are executed ONLY by authorised persons.
WARNING
If one or more rooms are connected to the unit using a
duct system, make sure:
▪ there are no operating ignition sources (example: open
flames, an operating gas appliance or an operating
electric heater) in case the floor area is less than the
minimum floor area A (m²).
▪ no auxiliary devices, which may be a potential ignition
source, are installed in the duct work (example: hot
surfaces with a temperature exceeding 700°C and
electric switching device);
▪ only auxiliary devices approved by the manufacturer
are used in the duct work;
▪ air inlet AND outlet are connected directly to the same
room by ducting. Do NOT use spaces such as a false
ceiling as a duct for the air inlet or outlet.
WARNING
▪ Take precautions to avoid excessive vibration or
pulsation to refrigeration piping.
▪ Protect the protection devices, piping and fittings as
much as possible against adverse environmental
effects.
▪ Provide space for expansion and contraction of long
runs of piping.
▪ Design and install piping in refrigerating systems such
as to minimise the likelihood of hydraulic shock
damaging the system.
▪ Mount the indoor equipment and pipes securely and
protect them to avoid accidental rupture of equipment
or pipes in case of events such as moving furniture or
reconstruction activities.
CAUTION
Do NOT use potential sources of ignition in searching for
or detection of refrigerant leaks.
NOTICE
▪ Do NOT re-use joints and copper gaskets which have
been used already.
▪ Joints made in installation between parts of refrigerant
system shall be accessible for maintenance purposes.
See "12.3 To determine the charge limit" [4 19] to check if your
system meets the requirement for charge limitation.
For the user
3 User safety instructions
Always observe the following safety instructions and regulations.
3.1 General
WARNING
If you are NOT sure how to operate the
unit, contact your installer.
WARNING
This appliance can be used by children
aged from 8 years and above and
persons with reduced physical, sensory
or mental capabilities or lack of
experience and knowledge if they have
been given supervision or instruction
concerning use of the appliance in a
safe way and understand the hazards
involved.
Children SHALL NOT play with the
appliance.
Cleaning and user maintenance
SHALL NOT be made by children
without supervision.
WARNING
To prevent electrical shocks or fire:
▪ Do NOT rinse the unit.
▪ Do NOT operate the unit with wet
hands.
▪ Do NOT place any objects containing
water on the unit.

3 User safety instructions
Installation and operation manual
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CAUTION
▪ Do NOT place any objects or
equipment on top of the unit.
▪ Do NOT sit, climb or stand on the
unit.
▪ Units are marked with the following symbol:
This means that electrical and electronic products may NOT be
mixed with unsorted household waste. Do NOT try to dismantle
the system yourself: dismantling the system, treatment of the
refrigerant, of oil and of other parts MUST be done by an
authorised installer and MUST comply with applicable legislation.
Units MUST be treated at a specialised treatment facility for reuse,
recycling and recovery. By ensuring this product is disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health. For more information,
contact your installer or local authority.
▪ Batteries are marked with the following symbol:
This means that the batteries may NOT be mixed with unsorted
household waste. If a chemical symbol is printed beneath the
symbol, this chemical symbol means that the battery contains a
heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries MUST be treated at a specialised treatment
facility for reuse. By ensuring waste batteries are disposed of
correctly, you will help to prevent potential negative consequences
for the environment and human health.
3.2 Instructions for safe operation
CAUTION
▪ NEVER touch the internal parts of the
controller.
▪ Do NOT remove the front panel.
Some parts inside are dangerous to
touch and appliance problems may
happen. For checking and adjusting
the internal parts, contact your
dealer.
WARNING
NEVER touch the air outlet or the
horizontal blades while the swing flap
is in operation. Fingers may become
caught or the unit may break down.
CAUTION
Do NOT operate the system when
using a room fumigation-type
insecticide. Chemicals could collect in
the unit, and endanger the health of
people who are hypersensitive to
chemicals.
CAUTION
It is unhealthy to expose your body to
the air flow for a long time.
CAUTION
To avoid oxygen deficiency, ventilate
the room sufficiently if equipment with
burner is used together with the
system.
WARNING
This unit contains electrical and hot
parts.
WARNING
Before operating the unit, be sure the
installation has been carried out
correctly by an installer.
WARNING
NEVER touch the air outlet or the
horizontal blades while the swing flap
is in operation. Fingers may become
caught or the unit may break down.
CAUTION
Do NOT insert fingers, rods or other
objects into the air inlet or outlet. Do
NOT remove the fan guard. When the
fan is rotating at high speed, it will
cause injury.
CAUTION: Pay attention to the fan!
It is dangerous to inspect the unit while
the fan is running.
Make sure to turn OFF the main switch
before executing any maintenance
task.
CAUTION
After a long use, check the unit stand
and fitting for damage. If damaged, the
unit may fall and result in injury.

4 About the system
Installation and operation manual
9
RXYSA4~6A7V/Y1B
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4P600329-1E – 2023.02
WARNING
NEVER replace a fuse with a fuse of a
wrong ampere ratings or other wires
when a fuse blows out. Use of wire or
copper wire may cause the unit to
break down or cause a fire.
WARNING
▪ Do NOT modify, disassemble,
remove, reinstall or repair the unit
yourself as incorrect dismantling or
installation may cause an electrical
shock or fire. Contact your dealer.
▪ In case of accidental refrigerant
leaks, make sure there are no naked
flames. The refrigerant itself is
entirely safe, non-toxic and mildly
flammable, but it will generate toxic
gas when it accidentally leaks into a
room where combustible air from fan
heaters, gas cookers, etc. is present.
Always have qualified service
personnel confirm that the point of
leakage has been repaired or
corrected before resuming operation.
WARNING
▪ Do NOT pierce or burn refrigerant
cycle parts.
▪ Do NOT use cleaning materials or
means to accelerate the defrosting
process other than those
recommended by the manufacturer.
▪ Be aware that the refrigerant inside
the system is odourless.
WARNING
The appliance shall be stored in a
room without continuously operating
ignition sources (example: open
flames, an operating gas appliance or
an operating electric heater).
WARNING: MILDLY FLAMMABLE
MATERIAL
The refrigerant inside this unit is mildly
flammable.
WARNING
Stop operation and shut OFF the
power if anything unusual occurs
(burning smells etc.).
Leaving the unit running under such
circumstances may cause breakage,
electrical shock or fire. Contact your
dealer.
CAUTION
NEVER expose little children, plants or
animals directly to the airflow.
WARNING
The unit is equipped with a refrigerant
leak detection system for safety.
To be effective, the unit MUST be
electrically powered at all times after
installation, except for maintenance.
4 About the system
The VRV 5-S uses R32 refrigerant which is rated as A2L and is
mildly flammable. For compliance with the requirements for
enhanced tightness refrigerating systems and IEC60335-2-40 the
installer must take extra measures. For more information, see
"2.1Instructions for equipment using R32 refrigerant"[46].
The indoor unit part of this VRV 5-S heat pump system can be used
for heating/cooling applications. The type of indoor unit which can be
used depends on the outdoor units series.
WARNING
▪ Do NOT modify, disassemble, remove, reinstall or
repair the unit yourself as incorrect dismantling or
installation may cause an electrical shock or fire.
Contact your dealer.
▪ In case of accidental refrigerant leaks, make sure there
are no naked flames. The refrigerant itself is entirely
safe, non-toxic and mildly flammable, but it will
generate toxic gas when it accidentally leaks into a
room where combustible air from fan heaters, gas
cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been
repaired or corrected before resuming operation.
NOTICE
Do NOT use the system for other purposes. In order to
avoid any quality deterioration, do NOT use the unit for
cooling precision instruments, food, plants, animals, or
works of art.
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.

5 User interface
Installation and operation manual
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4P600329-1E – 2023.02
4.1 System layout
b
a
c
d
f e
d
c
b b
c
d
aHeat pump outdoor unit
bRefrigerant piping
cVRV direct expansion (DX) indoor unit
dRemote controller in normal mode
eRemote controller in alarm only mode
fRemote controller in supervisor mode (mandatory in
some situations)
5 User interface
CAUTION
▪ NEVER touch the internal parts of the controller.
▪ Do NOT remove the front panel. Some parts inside are
dangerous to touch and appliance problems may
happen. For checking and adjusting the internal parts,
contact your dealer.
This operation manual offers a non-exhaustive overview of the main
functions of the system.
Detailed information on required actions to achieve certain functions
can be found in the dedicated installation and operation manual of
the indoor unit.
Refer to the operation manual of the installed user interface.
6 Operation
6.1 Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
Cooling Heating
Outdoor
temperature
–5~46°CDB –20~21°CDB
–20~15.5°CWB
Indoor
temperature
21~32°CDB
14~25°CWB
15~27°CDB
Indoor humidity ≤80%(a)
(a) To avoid condensation and water dripping out of the unit. If the
temperature or the humidity is beyond these conditions, safety
devices may be put in action and the air conditioner may not
operate.
6.2 Operating the system
6.2.1 About operating the system
▪ Operation procedure varies according to the combination of
outdoor unit and user interface.
▪ To protect the unit, turn on the main power switch 6 hours before
operation.
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
6.2.2 About cooling, heating, fan only, and
automatic operation
▪ Changeover cannot be made with a user interface whose display
shows "change-over under centralised control" (refer to
installation and operation manual of the user interface).
▪ When the display "change-over under centralised control"
flashes, refer to "6.5.1 About setting the master user
interface"[412].
▪ The fan may keep on running for about 1 minute after the heating
operation stops.
▪ The air flow rate may adjust itself depending on the room
temperature or the fan may stop immediately. This is not a
malfunction.
6.2.3 About the heating operation
It may take longer to reach the set temperature for general heating
operation than for cooling operation.
The following operation is performed in order to prevent the heating
capacity from dropping or cold air from blowing.
Defrost operation
In heating operation, freezing of the outdoor unit's air cooled coil
increases over time, restricting the energy transfer to the outdoor
unit's coil. Heating capability decreases and the system needs to go
into defrost operation to be able to remove frost from the outdoor
unit’s coil. During defrost operation the heating capacity on the
indoor unit side will temporarily drop until defrosting is completed.
After defrosting, the unit will regain its full heating capacity.
The indoor unit will stop fan operation, the refrigerant cycle will
reverse and energy from inside the building will be used to defrost
the outdoor unit coil.
The indoor unit will indicate defrost operation on the display .
Hot start
In order to prevent cold air from blowing out of an indoor unit at the
start of heating operation, the indoor fan is automatically stopped.
The display of the user interface shows . It may take some time
before the fan starts. This is not a malfunction.
6.2.4 To operate the system (WITHOUT cool/
heat changeover remote control switch)
1Press the operation mode selector button on the user interface
several times and select the operation mode of your choice.
Cooling operation
Heating operation
Fan only operation
2Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts
operating.

6 Operation
Installation and operation manual
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6.2.5 To operate the system (WITH cool/heat
changeover remote control switch)
Overview of the changeover remote control switch
a
b
aFAN ONLY/AIR CONDITIONING
SELECTOR SWITCH
Set the switch to for fan only
operation or to for heating or
cooling operation.
bCOOL/HEAT CHANGEOVER SWITCH
Set the switch to for cooling or to
for heating
Note: In case a cool/heat changeover remote control switch is used,
the position of DIP switch 1 (DS1-1) on the main PCB needs to be
switched to the ON position.
To start
1Select operation mode with the cool/heat changeover switch as
follows:
Cooling operation Heating operation Fan only operation

1
1
1

1
1
1
11
2Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts
operating.
To stop
3Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
To adjust
For programming temperature, fan speed and air flow direction refer
to the operation manual of the user interface.
6.3 Using the dry program
6.3.1 About the dry program
▪ The function of this program is to decrease the humidity in your
room with minimal temperature decrease (minimal room cooling).
▪ The micro computer automatically determines temperature and
fan speed (cannot be set by the user interface).
▪ The system does not go into operation if the room temperature is
low (<20°C).
6.3.2 To use the dry program (WITHOUT cool/
heat changeover remote control switch)
To start
1Press the operation mode selector button on the user interface
several times and select (program dry operation).
2Press the ON/OFF button of the user interface.
Result: The operation lamp lights up and the system starts
operating.
3Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to "6.4Adjusting the air flow direction"[411] for details.
To stop
4Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
6.3.3 To use the dry program (WITH cool/heat
changeover remote control switch)
To start
1Select cooling operation mode with the cool/heat changeover
remote control switch.
1
1
2Press the operation mode selector button on the user interface
several times and select (program dry operation).
3Press the ON/OFF button of the user interface.
Result: The operation lamp lights up and the system starts
operating.
4Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to "6.4Adjusting the air flow direction"[411] for details.
To stop
5Press the ON/OFF button on the user interface once again.
Result: The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
6.4 Adjusting the air flow direction
Refer to the operation manual of the user interface.
6.4.1 About the air flow flap
Double flow + multi-flow units

7 Maintenance and service
Installation and operation manual
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RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
Wall-mounted units
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
Cooling Heating
▪ When the room temperature is
lower than the set
temperature.
▪ When starting operation.
▪ When the room temperature is
higher than the set
temperature.
▪ At defrost operation.
▪ When operating continuously at horizontal air flow direction.
▪ When continuous operation with downward air flow is performed
at the time of cooling with a ceiling-suspended or a wall-mounted
unit, the micro computer may control the flow direction, and then
the user interface indication will also change.
The air flow direction can be adjusted in one of the following ways:
▪ The air flow flap itself adjusts its position.
▪ The air flow direction can be fixed by the user.
▪ Automatic and desired position .
WARNING
NEVER touch the air outlet or the horizontal blades while
the swing flap is in operation. Fingers may become caught
or the unit may break down.
NOTICE
▪ The movable limit of the flap is changeable. Contact
your dealer for details. (only for double-flow, multi-flow,
corner, ceiling-suspended and wall-mounted).
▪ Avoid operating in the horizontal direction . It may
cause dew or dust to settle on the ceiling or flap.
6.5 Setting the master user interface
6.5.1 About setting the master user interface
b
a
c
d
f e
d
c
b b
c
d
aHeat pump outdoor unit
bRefrigerant piping
cVRV direct expansion (DX) indoor unit
dRemote controller in normal mode
eRemote controller in alarm only mode
fRemote controller in supervisor mode (mandatory in
some situations)
When the system is installed as shown in the figure above, it is
necessary to designate one of the user interfaces as the master user
interface.
The displays of slave user interfaces show (change-over
under centralised control) and slave user interfaces automatically
follow the operation mode directed by the master user interface.
Only the master user interface can select heating or cooling mode.
6.5.2 To designate the master user interface
1Press the operation mode selector button of the current master
user interface for 4 seconds. In case this procedure was not yet
performed, the procedure can be executed on the first user
interface operated.
Result: The display showing (change-over under
centralised control) of all slave user interfaces connected to the
same outdoor unit flashes.
2Press the operation mode selector button of the controller that
you wish to designate as the master user interface.
Result: Designation is completed. This user interface is
designated as the master user interface and the display
showing (change-over under centralised control)
vanishes. The displays of other user interfaces show
(change-over under centralised control).
7 Maintenance and service
WARNING
The unit is equipped with a refrigerant leak detection
system for safety.
To be effective, the unit MUST be electrically powered at
all times after installation, except for maintenance.
WARNING
NEVER replace a fuse with a fuse of a wrong ampere
ratings or other wires when a fuse blows out. Use of wire
or copper wire may cause the unit to break down or cause
a fire.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. Do NOT remove the fan guard. When the
fan is rotating at high speed, it will cause injury.
CAUTION
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
NOTICE
NEVER inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
NOTICE
Do NOT wipe the controller operation panel with benzine,
thinner, chemical dust cloth, etc. The panel may get
discoloured or the coating peeled off. If it is heavily dirty,
soak a cloth in water-diluted neutral detergent, squeeze it
well and wipe the panel clean. Wipe it with another dry
cloth.
7.1 About the refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
Periodical inspections for refrigerant leaks may be required
depending on the applicable legislation. Contact your installer for
more information.

8 Troubleshooting
Installation and operation manual
13
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
NOTICE
Applicable legislation on fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO2 equivalent.
Formula to calculate the quantity in CO2 equivalent
tonnes: GWP value of the refrigerant × total refrigerant
charge [in kg]/1000
Contact your installer for more information.
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
WARNING
▪ The refrigerant inside the unit is mildly flammable, but
normally does NOT leak. If the refrigerant leaks in the
room and comes in contact with fire from a burner, a
heater, or a cooker, this may result in fire, or the
formation of a harmful gas.
▪ Turn OFF any combustible heating devices, ventilate
the room, and contact the dealer where you purchased
the unit.
▪ Do NOT use the unit until a service person confirms
that the part from which the refrigerant leaked has been
repaired.
WARNING
The appliance shall be stored in a room without
continuously operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater).
WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Do NOT use cleaning materials or means to accelerate
the defrosting process other than those recommended
by the manufacturer.
▪ Be aware that the refrigerant inside the system is
odourless.
7.2 After-sales service and warranty
7.2.1 Warranty period
▪ This product includes a warranty card that was filled in by the
dealer at the time of installation. The completed card has to be
checked by the customer and stored carefully.
▪ If repairs to the product are necessary within the warranty period,
contact your dealer and keep the warranty card at hand.
7.2.2 Recommended maintenance and
inspection
Since dust collects when using the unit for several years,
performance of the unit will deteriorate to some extent. As taking
apart and cleaning interiors of units requires technical expertise and
in order to ensure the best possible maintenance of your units, we
recommend to enter into a maintenance and inspection contract on
top of normal maintenance activities. Our network of dealers has
access to a permanent stock of essential components in order to
keep your unit in operation as long as possible. Contact your dealer
for more information.
When asking your dealer for an intervention, always state:
▪ The complete model name of the unit.
▪ The manufacturing number (stated on the nameplate of the unit).
▪ The installation date.
▪ The symptoms or malfunction, and details of the defect.
WARNING
▪ Do NOT modify, disassemble, remove, reinstall or
repair the unit yourself as incorrect dismantling or
installation may cause an electrical shock or fire.
Contact your dealer.
▪ In case of accidental refrigerant leaks, make sure there
are no naked flames. The refrigerant itself is entirely
safe, non-toxic and mildly flammable, but it will
generate toxic gas when it accidentally leaks into a
room where combustible air from fan heaters, gas
cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been
repaired or corrected before resuming operation.
8 Troubleshooting
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
WARNING
Stop operation and shut OFF the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electrical shock or fire. Contact your
dealer.
The system MUST be repaired by a qualified service person.
Malfunction Measure
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates or the ON/OFF
switch does NOT properly work.
Turn OFF the main power
switch.
The operation switch does NOT work
well.
Turn OFF the power
supply.
If the user interface display indicates the
unit number, the operation lamp flashes
and the malfunction code appears.
Notify your installer and
report the malfunction
code.
If the system does NOT operate properly except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system in accordance with the following
procedures.
Malfunction Measure
If a refrigerant leak
occurs (error code /
)
▪ Actions will be taken by the system. Do
NOT turn OFF the power supply.
▪ Notify your installer and report the
malfunction code.
If the system does not
operate at all.
▪ Check if there is no power failure. Wait
until power is restored. If power failure
occurs during operation, the system
automatically restarts immediately after
power is restored.
▪ Check if no fuse has blown or breaker is
activated. Change the fuse or reset the
breaker if necessary.
If the system goes into
fan only operation, but
as soon as it goes into
heating or cooling
operation, the system
stops.
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles and make sure
the air can flow freely.
▪ Check if the user interface display shows
on the home screen. Refer to the
installation and operation manual
delivered with the indoor unit.

8 Troubleshooting
Installation and operation manual
14
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
Malfunction Measure
The system operates
but cooling or heating
is insufficient.
▪ Check if air inlet or outlet of outdoor or
indoor unit is not blocked by obstacles.
Remove any obstacles and make sure
the air can flow freely.
▪ Check if the air filter is not clogged (refer
to "Maintenance" in the indoor unit
manual).
▪ Check the temperature setting.
▪ Check the fan speed setting on your user
interface.
▪ Check for open doors or windows. Close
doors and windows to prevent wind from
coming in.
▪ Check if there are too many occupants in
the room during cooling operation. Check
if the heat source of the room is
excessive.
▪ Check if direct sunlight enters the room.
Use curtains or blinds.
▪ Check if the air flow angle is proper.
If after checking all above items, it is impossible to fix the problem
yourself, contact your installer and state the symptoms, the complete
model name of the unit (with manufacturing number if possible) and
the installation date (possibly listed on the warranty card).
8.1 Error codes: Overview
In case a malfunction code appears on the indoor unit user interface
display, contact your installer and inform the malfunction code, the
unit type, and serial number (you can find this information on the
nameplate of the unit).
For your reference, a list with malfunction codes is provided. You
can, depending on the level of the malfunction code, reset the code
by pushing the ON/OFF button. If not, ask your installer for advice.
Main code Contents
External protection device was activated
The R32 sensor in one of the indoor units has
detected a refrigerant leak(a)
/ Safety system error (leak detection)(a)
EEPROM failure (indoor)
Drain system malfunction (indoor)
Fan motor malfunction (indoor)
Swing flap motor malfunction (indoor)
Expansion valve malfunction (indoor)
Drain malfunction (indoor unit)
Filter dust chamber malfunction (indoor)
Capacity setting malfunction (indoor)
Transmission malfunction between main PCB and sub
PCB (indoor)
Heat exchanger thermistor malfunction (indoor; liquid)
Heat exchanger thermistor malfunction (indoor; gas)
Suction air thermistor malfunction (indoor)
Discharge air thermistor malfunction (indoor)
Movement detector or floor temperature sensor
malfunction (indoor)
R32 sensor malfunction in one of the indoor units(a)
R32 sensor end of lifetime in one of the indoor units(a)
R32 sensor 6months before end of lifetime in one of
the indoor units(a)
Main code Contents
Waiting for R32 sensor replacement confirmation from
one of the indoor units(a)
User interface thermistor malfunction (indoor)
PCB malfunction (outdoor)
High pressure switch was activated
Low pressure malfunction (outdoor)
Compressor lock detection (outdoor)
Fan motor malfunction (outdoor)
Electronic expansion valve malfunction (outdoor)
Discharge temperature malfunction (outdoor)
Abnormal suction temperature (outdoor)
Refrigerant overcharge detection
High pressure switch malfunction
Fan motor trouble (outdoor)
Ambient temperature sensor malfunction (outdoor)
Pressure sensor malfunction
Current sensor malfunction
Discharge temperature sensor malfunction (outdoor)
Suction temperature sensor malfunction (outdoor)
De-icing temperature sensor malfunction (outdoor)
Liquid temperature sensor (after subcool HE)
malfunction (outdoor)
Gas temperature sensor (after subcool HE)
malfunction (outdoor)
High pressure sensor malfunction (S1NPH)
Low pressure sensor malfunction (S1NPL)
INV PCB abnormal
Fin temperature abnormal
Inverter PCB faulty
Compressor over current detected
Compressor lock (startup)
Shut-off PCB transmission trouble or disconnection
INV unbalanced power supply voltage
Fin thermistor malfunction
Capacity setting malfunction (outdoor)
Abnormal low pressure drop, faulty expansion valve
INV voltage power shortage
System test run not yet executed
Faulty wiring indoor/outdoor
Abnormal user interface - indoor communication
Abnormal main-sub user interface communication
System mismatch. Wrong type of indoor units
combined. Indoor unit malfunction.
Connection malfunction over indoor units or type
mismatch
System lock
Back-up PCB error
External ventilation input error
Centralised address duplication
Malfunction in communication centralised control
device - indoor unit
Auto address malfunction (inconsistency)
Auto address malfunction (inconsistency)
(a) The error code is only shown on the user interface of the indoor
unit where the error occurs.

8 Troubleshooting
Installation and operation manual
15
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
8.2 Symptoms that are NOT system
malfunctions
The following symptoms are NOT system malfunctions:
8.2.1 Symptom: The system does not operate
▪ The air conditioner does not start immediately after the ON/OFF
button on the user interface is pressed. If the operation lamp
lights, the system is in normal condition. To prevent overloading of
the compressor motor, the air conditioner starts 5 minutes after it
is turned ON again in case it was turned OFF just before. The
same starting delay occurs after the operation mode selector
button was used.
▪ If "Under Centralized Control" is displayed on the user interface,
pressing the operation button causes the display to blink for a few
seconds. The blinking display indicates that the user interface
cannot be used.
▪ The system does not start immediately after the power supply is
turned on. Wait one minute until the micro computer is prepared
for operation.
8.2.2 Symptom: Cool/Heat cannot be changed
over
▪ When the display shows (change-over under centralized
control), it shows that this is a slave user interface.
▪ When the cool/heat changeover remote control switch is installed
and the display shows (change-over under centralized
control), this is because cool/heat changeover is controlled by the
cool/ heat changeover remote control switch. Ask your dealer
where the remote control switch is installed.
8.2.3 Symptom: Fan operation is possible, but
cooling and heating do not work
Immediately after the power is turned on. The micro computer is
getting ready to operate and is performing a communication check
with all indoor units. Please wait 12 minutes maximally until this
process is finished.
8.2.4 Symptom: The fan speed does not
correspond to the setting
The fan speed does not change even if the fan speed adjustment
button is pressed. During heating operation, when the room
temperature reaches the set temperature, the outdoor unit goes off
and the indoor unit changes to whisper fan speed. This is to prevent
cold air blowing directly on occupants of the room. The fan speed
will not change even when another indoor unit is in heating
operation, if the button is pressed.
8.2.5 Symptom: The fan direction does not
correspond to the setting
The fan direction does not correspond with the user interface
display. The fan direction does not swing. This is because the unit is
being controlled by the micro computer.
8.2.6 Symptom: White mist comes out of a unit
(Indoor unit)
▪ When humidity is high during cooling operation. If the interior of an
indoor unit is extremely contaminated, the temperature distribution
inside a room becomes uneven. It is necessary to clean the
interior of the indoor unit. Ask your dealer for details on cleaning
the unit. This operation requires a qualified service person.
▪ Immediately after the cooling operation stops and if the room
temperature and humidity are low. This is because warm
refrigerant gas flows back into the indoor unit and generates
steam.
8.2.7 Symptom: White mist comes out of a unit
(Indoor unit, outdoor unit)
When the system is changed over to heating operation after defrost
operation. Moisture generated by defrost becomes steam and is
exhausted.
8.2.8 Symptom: The user interface reads "U4"
or "U5" and stops, but then restarts after a
few minutes
This is because the user interface is intercepting noise from electric
appliances other than the air conditioner. The noise prevents
communication between the units, causing them to stop. Operation
automatically restarts when the noise ceases. A power reset may
help to remove this error.
8.2.9 Symptom: Noise of air conditioners
(Indoor unit)
▪ A "zeen" sound is heard immediately after the power supply is
turned on. The electronic expansion valve inside an indoor unit
starts working and makes the noise. Its volume will reduce in
about one minute.
▪ A continuous low "shah" sound is heard when the system is in
cooling operation or at a stop. When the drain pump (optional
accessories) is in operation, this noise is heard.
▪ A "pishi-pishi" squeaking sound is heard when the system stops
after heating operation. Expansion and contraction of plastic parts
caused by temperature change make this noise.
▪ A low "sah", "choro-choro" sound is heard while the indoor unit is
stopped. When another indoor unit is in operation, this noise is
heard. In order to prevent oil and refrigerant from remaining in the
system, a small amount of refrigerant is kept flowing.
8.2.10 Symptom: Noise of air conditioners
(Indoor unit, outdoor unit)
▪ A continuous low hissing sound is heard when the system is in
cooling or defrost operation. This is the sound of refrigerant gas
flowing through both indoor and outdoor units.
▪ A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation. This is the noise of
refrigerant caused by flow stop or flow change.
8.2.11 Symptom: Noise of air conditioners
(Outdoor unit)
When the tone of operating noise changes. This noise is caused by
the change of frequency.
8.2.12 Symptom: Dust comes out of the unit
When the unit is used for the first time in a long time. This is
because dust has gotten into the unit.
8.2.13 Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc.,
and then emit it again.

9 Relocation
Installation and operation manual
16
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
8.2.14 Symptom: The outdoor unit fan does not
spin
During operation. The speed of the fan is controlled in order to
optimise product operation.
8.2.15 Symptom: The compressor in the outdoor
unit does not stop after a short heating
operation
This is to prevent refrigerant from remaining in the compressor. The
unit will stop after 5 to 10 minutes.
8.2.16 Symptom: The inside of an outdoor unit is
warm even when the unit has stopped
This is because the crankcase heater is warming the compressor so
that the compressor can start smoothly.
8.2.17 Symptom: Hot air can be felt when the
indoor unit is stopped
Several different indoor units are being run on the same system.
When another unit is running, some refrigerant will still flow through
the unit.
9 Relocation
Contact your dealer to remove and reinstall the entire unit. Moving
units requires technical expertise.
10 Disposal
This unit uses hydrofluorocarbon. Contact your dealer when
discarding this unit. It is required by law to collect, transport and
discard the refrigerant in accordance with the "hydrofluorocarbon
collection and destruction" regulations.
NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
For the installer
11 About the box
Keep the following in mind:
▪ At delivery, the unit MUST be checked for damage and
completeness. Any damage or missing parts MUST be reported
immediately to the claims agent of the carrier.
▪ Bring the packed unit as close as possible to its final installation
position to prevent damage during transport.
▪ Prepare in advance the path along which you want to bring the
unit to its final installation position.
11.1 Outdoor unit
11.1.1 To unpack the outdoor unit
21
11.1.2 To handle the outdoor unit
CAUTION
To avoid injury, do NOT touch the air inlet or aluminium
fins of the unit.
Carry the unit slowly as shown:
±100
kg
Forklift. As long as the unit remains on its pallet, you can also use a
forklift.

12 Special requirements for R32 units
Installation and operation manual
17
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
11.1.3 To remove the accessories from the
outdoor unit
1Remove the service cover. See "13.2.1 To open the outdoor
unit"[423].
4P590088-1A
1×
1
1×
2×
b
1×
a c
1×
1×
de f
3×
PH2
8 mm
1× 1× 1× 1× 1×
gh i j k
23
4
aGeneral safety precautions
bOutdoor unit installation manual
cCaution label
dFluorinated greenhouse gases label
eAdditional refrigerant charge label
fCable tie
gLiquid line piping — bend
hLiquid line piping — short
iLiquid line piping — long
jGas line piping — bend
kGas line piping
12 Special requirements for R32
units
12.1 Installation space requirements
WARNING
If the appliance contains R32 refrigerant, the floor area of
the room in which the appliance is stored shall be at least
98.3m².
NOTICE
▪ Protect pipework from physical damage.
▪ Keep the pipework installation to a minimum.
12.2 System layout requirements
The VRV 5-S uses R32 refrigerant which is rated as A2L and is
mildly flammable.
To comply with the requirements of enhanced tightness refrigerating
systems of the IEC60335-2-40, this system is equipped with shut-off
valves in the outdoor unit and an alarm in the remote controller. In
case the requirements of this manual are followed, no additional
safety measures are needed.
A big range of charge and room area combinations is allowed thanks
to the countermeasures that are implemented in the unit by default.
Follow the installation requirements below to ensure that the
complete system is compliant to legislation.
Outdoor unit installation
The outdoor unit must be installed outside. For indoor installation of
the outdoor unit, additional measures can be necessary to comply
with the applicable legislation.
A terminal for external output is available in the outdoor unit. This
SVS output can be used when additional countermeasures are
needed. The SVS output is a contact on terminal X2M that closes in
case a leak is detected, failure or disconnection of the R32 sensor
(located in the indoor unit).
For more information about the SVS output, see "16.4 To connect
the external outputs"[432].
Indoor unit installation
NOTICE
If one or more rooms are connected to the unit using a
duct system, make sure air inlet AND outlet are connected
directly to the same room by ducting. Do NOT use spaces
such as a false ceiling as a duct for the air inlet or outlet.
For installation of the indoor unit, refer to the installation and
operation manual delivered with the indoor unit. For compatibility of
indoor units refer to the latest version of the technical data book of
this unit.
The total amount of refrigerant in the system shall be less than or
equal to the maximum allowed total refrigerant amount. The
maximum allowed total refrigerant amount depends on the area of
the rooms being served by the system and the rooms in the lowest
underground floor.
See "12.3 To determine the charge limit" [4 19] to check if your
system meets the requirement for charge limitation.
An optional output PCB for the indoor unit can be added to provide
output for external device. The output PCB will trigger in case a leak
is detected, the R32 sensor fails or when the sensor is disconnected.
For exact model name see option list of the indoor unit. For more
information about this option, refer to the installation manual of the
optional output PCB.
Piping requirements
Piping must be installed according to instructions given in "14Piping
installation" [4 24]. Only mechanical joints (e.g. braze+flare
connections) that are compliant with the latest version of ISO14903
can be used.
For piping installed in the occupied space, please make sure that the
piping is protected against accidental damage. Piping should be
checked according to procedure as mentioned in "14.3Checking the
refrigerant piping"[427].
Remote controller requirements
b
a
c
d
f
h
e
d
c
b b
c
d
g
h h
aHeat pump outdoor unit
bRefrigerant piping
cVRV direct expansion (DX) indoor unit
dRemote controller in normal mode
eRemote controller in alarm only mode
fRemote controller in supervisor mode (mandatory in
some situations)
gCentralised controller (optional)
hOption PCB (optional)

12 Special requirements for R32 units
Installation and operation manual
18
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
For installation of the remote controller, please refer to the
installation and operation manual delivered with the remote
controller. Each indoor unit must be connected with a R32 safety
system compatible remote controller (e.g. BRC1H52/82* or later
type). These remote controllers have implemented safety measures
that will warn the user visually and audibly in case of a leak.
For installation of the remote controller, it is mandatory to follow the
requirements.
1Only a safety system compatible remote controller can be used.
See technical data sheet for remote controller compatibility (e.g.
BRC1H52/82*).
2Each indoor unit must be connected to a separate remote
controller. In case indoor units are operating under group
control, it is possible to use only one remote controller per
room.
3The remote controller put in the room served by the indoor unit
must be in 'fully functional' or 'alarm only' mode. In case the
indoor unit is serving a room other than where it is installed, a
remote controller is required in both the installed and served
room (some relaxations are possible, see examples below). For
details about the different remote controller modes and how to
set up, please check the note below or refer to the installation
and operation manual delivered with the remote controller.
4For buildings where sleeping facilities are offered (e.g. hotel),
where persons are restricted in their movements (e.g.
hospitals), an uncontrolled number of persons is present or
buildings where people are not aware of the safety precautions
it is mandatory to install one of the following devices at a
location with 24-hour monitoring:
▪ a supervisor remote controller
▪ or a centralised controller. E.g., iTM with external alarm via
WAGO module, iTM with built-in alarm, …
Note: The remote controllers with built-in alarm will generate a
visible and audible warning. E.g. the BRC1H52/82* remote
controllers can generate an alarm of 65 dB (sound pressure,
measured at 1m distance of the alarm). Sound data is available in
the technical data sheet of the remote controller. The alarm should
always be 15dB louder than the background noise of the room.
A field supply external alarm with a sound output 15dB louder than
the background noise of the room MUST be installed in the following
cases:
▪ The sound output of the remote controller is not sufficient to
guarantee the 15 dB difference. This alarm can be connected to
the SVS output channel of the outdoor unit or to the optional
output PCB of the indoor unit of that specific room. The outdoor
SVS will trigger for any R32 leak detected in the complete system.
For indoor units, the optional output is only triggered when its own
R32 sensor detects a leak. For more information on the SVS
output signal, see "16.3 To connect the electrical wiring to the
outdoor unit" [4 31]. For more information on the optional output
PCB of the indoor unit, please refer to the installer and user
reference guide of the indoor unit.
▪ A centralised controller without built-in alarm is used, or the sound
output of the centralised controller with built-in alarm is not
sufficient to guarantee the 15 dB difference. Please refer to the
installation manual of the centralised controller for the correct
procedure to install the external alarm.
Note: Depending on the configuration, the remote controller is
operable in three possible modes. Each mode offers different
controller functionality. For detailed information about setting the
operation mode of the remote controller and its function, please refer
to the installer and user reference guide of the remote controller.
Mode Function
Fully functional The controller is fully functional. All normal
functionality is available. This controller can
be master or slave.
Alarm only The controller only acts as leak detection
alarm (for a single indoor unit). No
functionality is available. The remote
controller should always be put in the same
room as the indoor unit. This controller can
be master or slave.
Supervisor The controller only acts as leak detection
alarm (for the whole system, i.e. multiple
indoor units and their respective controllers).
No other functionality is available. The remote
controller should be placed at a supervised
location. This remote controller can only
be the slave.
Note: In order to add a supervisor remote
controller to the system, a field setting should
be set on both remote controller and outdoor
unit.
Note: Incorrect use of remote controllers can result in occurrence of
error codes, non-operating system or system that is not compliant to
applicable legislation.
Note: Some centralised controllers can also be used as supervisor
remote controller. For further details on installation, please refer to
the installation manual of the centralised controllers.
Examples
NOT OK OK Case
1
a
c
b
a
d
b
Remote controller is not R32 safety system
compatible
2
a
b b b
e
a
b
d
b
d
b
d
Indoor units without remote controller are not
allowed

12 Special requirements for R32 units
Installation and operation manual
19
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
NOT OK OK Case
3
a
d
b
a
d
b
In case of one R32 safety system compatible
remote controller, it should be the master and in
the same room of the indoor unit.
4
a
d
b
B B
B
a
B B
d
b
a
d
b
A B
a
d
b
d
d
B B
B
a
B B
d
d
b
b
In case a ducted indoor unit is serving a different
room than where it is installed, both supply and
return air MUST be directly ducted to that room.
The room area and remote controller rules
MUST be followed only in the served room when
a given room is served by only one ducted
indoor unit installed in a different room.
In all other situations both the room where the
ducted unit is installed and the served room(s)
need to follow the room area and remote
controller rules.
A: No room area restrictions apply. No remote
controller required.
B: Room area restrictions apply, and installation
of remote controller required.
5
a
d
d
b
a
d
d
b
In case of two R32 safety system compatible
remote controllers, at least one remote controller
should be in the room of the indoor.
6
a
b b
d
a
b b b
d
Group control is allowed up to a maximum of
5indoor units connected to different ports or
connected to the same port. At least one R32
safety system compatible remote controller
should be in the room of the indoors.
7
ab
d
b
d
e
f
In particular situations it is mandatory to install a
remote controller at a supervised location.
In room: master remote controller in fully
functional OR alarm only.
In supervisor room: supervisor remote controller.
aOutdoor unit
bIndoor unit
cRemote controller NOT compatible with R32 safety
system
dRemote controller compatible with R32 safety system
eRemote controller in supervisor mode
fSupervisor room
gDucts (supply and return air)
12.3 To determine the charge limit
Step 1 – In order to derive the total refrigerant charge limit in the
system, determine the area:
▪ of the rooms where an indoor unit is installed.
▪ AND of the rooms served by a ducted indoor unit installed in a
different room.
The room area can be determined by projecting the walls, doors and
partitions to the floor and calculate the enclosed area. The area of
the smallest room being served by the system is used in the next
step to determine the maximum allowable total charge of the system.
Spaces connected by only false ceilings, ductwork, or similar
connections shall not be considered a single space.

12 Special requirements for R32 units
Installation and operation manual
20
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
If the partition between two rooms on the same floor meets certain
requirements, then the rooms are considered as one room and the
areas of the rooms may be added up. In this way it is possible to
increase the Amin value used to calculate the maximum allowed
charge.
One of the following two requirements must be met to add up room
areas:
▪ Rooms on the same floor that are connected with a permanent
opening that extends to the floor and is intended for people to
walk through can be considered as one room.
▪ Rooms on the same floor connected with openings that fulfil
following requirements can be considered as a single room. The
opening must consist out of two parts to allow for air circulation.
Anvmin
≥ 20 mm
≥ 50% Anvmin
≤ 100 mm
1500
mm
300
mm
200
mm
≥ 20 mm
Anvmin Minimal natural ventilation area
For the lower opening:
▪ It is not an opening to the outside
▪ The opening cannot be closed
▪ The opening must be ≥0.012m² (Anvmin)
▪ The area of any openings above 300 mm from the floor does
not count when determining Anvmin
▪ At least 50% of Anvmin is less than 200mm above the floor
▪ The bottom of the lower opening is ≤100mm from the floor
▪ The height of the opening is ≥20mm
For the upper opening:
▪ It is not an opening to the outside
▪ The opening cannot be closed
▪ The opening must be ≥0.006m² (50% of Anvmin)
▪ The bottom of the upper opening must be ≥1500mm above the
floor
▪ The height of the opening is ≥20mm
Note: The requirement for the upper opening can be met by false
ceilings, ventilation ducts or similar arrangements that provide an
airflow path between the connected rooms.
Step2 – Use the graph or table (see "Figure 4"[43] at the beginning
of this manual) to determine the total refrigerant charge limit in the
system for each indoor unit AND for each room served by a ducted
indoor unit.
→ Legend for "Figure 4"[43]:
ASmallest room area
mTotal refrigerant charge limit in the system
(a) All other floors (=All other floors)
(b) Lowest underground floor (=Lowest underground floor)
(c) Effective installation height (=Effective installation height)
Determine the value for both the lowest underground floor AND the
other floors.
The total refrigerant charge limit depends on the effective installation
height, measured between:
▪ the bottom side of the indoor unit and the lowest point of the floor,
in case the indoor unit is installed in the same room.
▪ the bottom of the duct opening and the lowest point of the floor, for
rooms served by a ducted indoor unit installed in a different room.
Note: If the height for your installation is not shown, use the closest
lower height value in the table. E.g. for an installation height of
2.7m, use the value corresponding with height 2.5m of the table.
Refer to the databook for a more detailed table.
NOTICE
Indoor units and ducting cannot be installed lower than
1.8m from the lowest point of the floor.
ALL OTHER FLOORS
Choose the curve 'a' that corresponds to the effective
installation height
Choose the curve 'b' that corresponds to the effective
installation height
LOWEST UNDERGROUND FLOOR
Note: The derived charge value should be rounded down.
Step3 – Determine the total amount of refrigerant in the system:
Contains fluorinated greenhouse gases
2
11
1
2
2kg
tCO
2
eq
1000
GWP × kg
=
=
+
kg
=
kg
=
GWP: xxx
R32
Total charge=Factory charge +additional charge =3.4kg+R(a)
(a) The R value is calculated in "15.2To determine the additional
refrigerant amount"[428].
Step4 – The total refrigerant charge in the system MUST be less
than the lowest value of the refrigerant charge limit for each room
where an indoor unit is installed or that is served by a ducted indoor
unit installed in a different room. If NOT, change the installation (see
choices below) and repeat all of the above steps.
1. Increase the area of the room restricting the total charge.
OR
2. Decrease the piping length by changing the system layout.
OR
3. Increase the installation height of the unit or the duct.
OR
4. Add additional countermeasures as described in applicable
legislation.
SVS output or optional output PCB for indoor unit can be
used to connect and activate the additional
countermeasures (e.g. mechanical ventilation). For more
information, see "16.4To connect the external
outputs"[432].