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12. SV2 valve control
The conditions for opening and closing the SV2 valve are shown in the table below.
Non-operation
During Cooling
Operations
During Heating
Operations
During
Defrost
Operation
SV2 Valve “Open” Conditions
(1)
When operation stopped after operating
(2)
When power placed “ON”
(3)
When 30 second elapses after first startup
operation when power ON at TO
≤
5˚ C
(4)
When Ps
≤
0.23 MPa
(5)
When 30 second elapses after first startup
operation when power ON at TC < 26˚C
(6)
When Ps
≤
0.14 MPa
(7)
When conditions for defrost satisfied.
(8)
When conditions for defrost satisfied.
SV2 Valve “Close” Conditions
When operation started after operating or when 30 minutes
elapsed after opening SV2 under conditions (1) (2)
When 8 minutes elapsed after starting operation.
When Ps
≥
0.27 MPa
When 8 minutes elapsed after starting operation or when
TC
≥
26˚C
When Ps
≥
0.19 MPa
When 4-way valve is OFF during defrost startup.
When 2 minutes elapsed after four-way valve is ON after
defrost completion
ON
OFF
Open
Close
Compressor
revolution number
4-way valve
SV2
31rps
57(60.6)rps
Defrost
start condition
Defrost
completion condition
Defrost operation
2 minutes
