Fujitsu Airstage V series - Oil Balance Operation

04-07
4-5-2 Oil balance operation
(1) Purpose of the operation
Divide the oil equally between the outdoor units.
The master unit is operating
This is the end of oil balance operation.
(2) Starting conditions
(3) About oil balance operation (Example)
When only one outdoor unit is connected : Oil balance operation does not operate.
a) Oil balance operation (Slave unit Master unit)
SV7(Slave1) and SV6(Master) : Open for 1 min.
Accumulated time of compressor operation 20 min.
After oil recovery and defrost operation, when discharge SH is15 or more.
Master
Operation
Slave 1
Operation or stop
Slave 2
Operation or stop
SV7(Slave2) and SV6(Master) : Open for 1 min.
Oil is recovered to the master unit by operation & .
b) Oil distribution operation (Master unit Slave unit)
60 seconds after the oil recovery finish, master unit sends accumulated oil to the slave unit.
Oil shares in only a operating slave unit.
(Master unit SV7 open, operating slave unit SV6 open)
Oil distribution operation for 60 seconds and is finished.