Oil Balance Operation - Fujitsu Airstage V series Service Manual

4-5-2 Oil balance operation

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