Compressor Operation; Capacity Control; Operation / Stop Condition - Fujitsu Airstage J-II Service Manual

2-2 COMPRESSOR OPERATION

2-2-1 Operation / Stop Condition

When cooling requirement capacity or heating requirement capacity from either of the indoor units in the same
refrigerant circuit is input, the compressor operates.
When all the indoor units in no "cooling requirement capacity" or "heating requirement capacity", the compressor
is stopped.
But in the following case, the compressor operates in accordance with operation of each mode.
During 3 minute restart prevention operation
Icing protection
Failure (Refer to chapter 4, TROUBLE SHOOTING )
Oil recovery
Under expansion valve initialization
At protective operation
Emergency stop
Defrost operation
Peak cut stop operation

2-2-2 Capacity Control

(1) Capacity of compressor operation
By the operation of DC inverter rotary compressor, the amount of required refrigerant circulation acceding to
cooling and heating load can be supplied from compressor efficiently.
DC inverter rotary compressor is able to control the amount of
required refrigerant circulation in details.
Inverter Compressor
02-02
Total capacity
Cooling/Heating load