Toshiba MMU-AP0091H service manual 195, Refrigerant amount to be recovered = 37.5 28.0 = 9.5 kg

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		Combination of outdoor units			Refrigerant amount
HP					(kg)
8	8				13.5
10	10				14.0
12	12				14.5
16	8		8		21.5
18	10		8		23.0
20	10		10		25.0
24	8		8	8	30.0
26	10		8	8	31.5
28	10		10	8	33.0
30	10		10	10	34.5

195