Toshiba Super MMU-AP0091H Service Manual page 238

13-2. How to Operate the System during Repairing of the
Defective Outdoor Unit
<Work procedure>
1. Follow to the abovementioned "13-1. Refrigerant Recovery in the Troubled Outdoor Unit".
2. Next, recover the refrigerant in the system by using a recovery device, etc.
The refrigerant amount to be recovered is determined based upon the capacity of the troubled outdoor unit.
(See the following table.)
Example) In a case of backup for 10HP-outdoor unit in 30HP system:
in the original system HP (30HP system) = 37.5kg
Refrigerant amount in system HP (20HP system) after backup = 28.0kg
Refrigerant amount to be recovered = 37.5 – 28.0 = 9.5kg
3. For the unit which refrigerant has been recovered, execute "Outdoor Unit Backup Setup" in another section.
All the work has finished.
System
HP
5
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
Combination of outdoor units
5
6
8
10
12
8 6
8 8
10 8
10 10
8 8
12 10
8 8
12 12
10 8
10 10
10 10
8 8
12 10
10 8
12 12
10 10
12 12
10 10
10 10
12 10
12 12
12 12
12 12
238
Refrigerant amount
6
8
8
8
10
8 8
10
8 8
10
8 8
12
10 8
10 10
10 10
10 10
12 10
12 12
(kg)
8.5
8.5
14.0
15.0
16.0
21.0
25.0
25.0
28.0
33.5
30.0
33.5
32.0
33.5
35.0
37.5
44.0
38.5
44.0
40.0
44.0
41.5
44.0
45.0
46.0
48.0
50.0
52.0