Toshiba R410A, Быстрая справка

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How to Operate System While Failed Outdoor Unit Being Repaired
<Outline>
After refrigerant is recovered from the failed outdoor unit through a pump-down 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 faulty. 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 “Refrigerant Recovery from Failed Outdoor Unit (Pump-Down)”
(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 a 096 type outdoor unit is under repair in a 216 type system:
Amount of refrigerant required by system as it was initially (216 type in capacity) = 82.6 lb
Amount of refrigerant required by system with available outdoor units only (120 type in capacity) = 51.8 lb
Amount of refrigerant to be removed from system = 82.6 – 51.8 = 30.8 lb
(3) Set up the outdoor unit from which refrigerant has been recovered in the manner described in “Outdoor Unit
Backup Operation Setting”
This completes the procedure.
Outdoor unit
capacity type
Amount of refrigerant
[ lbs (kg) ]
conbined outdoor units
072 type
096 type
120 type
144 type
168 type
192 type
216 type
240 type
072 type
096 type
120 type
072 type
096 type
096 type
120 type
120 type
—
—
—
072 type
072 type
096 type
096 type
120 type
30.9 (14.0)
46.3 (21.0)
52.9 (24.0)
56.2 (25.5)
73.9 (33.5)
81.6 (37.0)
84.9 (38.5)
88.2 (40.0)
Outdoor Unit Refrigerant Recovery Method
(Continued)