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10-2. How to Operate System While Troubled Outdoor Unit Being Repaired
<Outline>
After refrigerant is recovered from the troubled outdoor unit through a reclaim operation, the overall amount of
refrigerant held by the system becomes excessive, and this makes it impossible to operate the remaining
outdoor units even though they are not troubled. However, operation is still possible if the system-wide amount
of refrigerant is adjusted in accordance with the procedure described below.
<Work procedure>
(1) Follow the steps specified in "10-1. Refrigerant Recovery from Troubled Outdoor Unit (Reclaim)".
(2) Adjust the amount of refrigerant held by the system by removing some of it using a refrigerant recovery
device, etc.
Determine the amount of refrigerant to be removed according to the capacity of the failed outdoor unit. (See
the table below.)
Example: If you are under repairing of a 16HP outdoor unit in the 50HP system
(combination of outdoor unit: 18HP + 16HP + 16HP):
Amount of refrigerant to be remove from this system = 11 kg
(3) Set up the outdoor unit from which refrigerant has been recovered in the manner described in "9-3. Outdoor
Unit Backup Operation Setting".
This completes the procedure.
System
Outdoor unit
capacity (HP)
combination
-
8
8
10
10
-
12
12
-
14
14
-
14A
14A
-
16
16
-
18
18
-
20
20
-
22
22
-
24
24
26
14
12
28
14
14
30
18
12
32
20
12
34
20
14
36
24
12
38
24
14
40
20
20
42
24
18
44
24
20
46
24
22
48
24
24
50
24
14
52
24
14
54
20
20
56
24
20
58
24
20
60
24
24
62
24
24
Amount of
refrigerant (kg)
-
-
-
7.5
-
-
-
7.7
-
-
-
8.3
-
-
-
8.3
9.8
-
-
-
-
-
-
10.0
-
-
-
11.0
-
-
-
13.0
-
-
-
14.0
-
-
-
14.5
-
-
-
16.6
-
-
-
16.6
-
-
-
20.7
-
-
-
21.3
-
-
-
21.3
-
-
-
22.8
-
-
-
22.8
-
-
-
26.0
-
-
-
25.5
-
-
-
27.5
-
-
-
28.5
-
-
29.0
12
-
-
31.1
14
-
-
31.1
-
-
14
34.3
12
-
-
35.8
14
-
-
35.8
12
-
-
37.3
-
-
14
37.3
System
capacity (HP)
64
24
20
66
24
22
68
24
24
70
24
24
72
24
24
74
24
24
76
24
24
78
24
20
80
24
24
82
24
24
84
24
24
86
24
24
88
24
24
90
24
24
92
24
24
94
24
24
96
24
24
98
24
24
100
24
24
102
24
24
104
24
24
106
24
24
108
24
24
110
24
24
112
24
24
114
24
24
116
24
24
118
24
24
120
24
24
- 260 -
Outdoor unit
Amount of
combination
refrigerant (kg)
-
-
20
20
-
-
20
-
-
22
-
-
24
-
-
-
14
12
14
14
-
20
14
-
20
12
-
20
14
-
24
12
-
24
14
-
20
20
-
22
20
-
24
20
-
24
22
-
24
24
-
24
14
12
24
14
14
20
20
14
24
20
12
24
20
14
24
24
12
24
24
14
24
20
20
24
22
20
24
24
20
24
24
22
24
24
24
37.3
41.5
42.0
43.0
43.5
45.6
45.6
48.8
50.3
50.3
51.8
51.8
55.0
56.0
56.5
57.5
58.0
60.1
60.1
63.3
64.8
64.8
66.3
66.3
69.5
70.5
71.0
72.0
72.5
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