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13-2. How to Operate the System During Repair of the
Malfunctioning Outdoor Unit
Procedure
1. Follow the aforementioned “13-1. Refrigerant Recovery in the Malfunctioning Outdoor Unit”.
2. Recover the refrigerant in the system by using a recovery device.
The refrigerant amount to be recovered is determined based upon the capacity of the malfunctioning outdoor
unit (see the following table).
Example) In a case of backup for 10 hp-outdoor unit in 30 hp system:
in the original system hp (30 hp system) = 37.5 kg
Refrigerant amount in system hp (20 hp system) after backup = 28.0 kg
Refrigerant amount to be recovered = 37.5 – 28.0 = 9.5 kg
3. For the unit which the refrigerant has been recovered, execute “Outdoor Unit Backup Setup” of another
section.
System
HP
8
10
12
16
18
20
24
26
28
30
Combination of outdoor units
8
10
12
88
10 8
10 10
888
10 8 8
10 10 8
10 10 10
Refrigerant amount
(kg)
13.5
14.0
14.5
21.5
23.0
25.0
30.0
31.5
33.0
34.5