ST
CV
SV1
SV2
SV3
SV4
SV5
SV6
ST
CP1
CP2
CP3
Close
Close
Open
Open
Open
Open
High Pressure
gas line
Low Pressure
gas Line
ST
CV
SV1
SV2
SV3
SV4
SV5
SV6
ST
CP1
CP2
CP3
Open
Close
Open
Close
Close
Close
Indoor unit Gas Pipe
Discharge Valve
Suction Valve
Equalization Valve (Pressurization)
Equalization Valve (Decompression)
Cooling / Dry mode Heating mode
SV1 ( SVD1 )
SV4 - 6 ( SVS )
SV2 ( SVB2 )
SV3 ( SVB1 )
Fan mode / Stop
Close
Open
Close
Open
Open
Close
Open
Close
Close
Close
Close
Open
Function
( Indication on Service Tool )
SV No.
Liquid Line
High Pressure
gas line
Low Pressure
gas Line
Liquid Line
ST
CV
SV1
SV2
SV3
SV4
SV5
SV6
ST
CP1
CP2
CP3
Close
Close
Open
Close
Close
Close
Indoor unit Gas Pipe
High Pressure
gas line
Low Pressure
gas Line
Liquid Line
Discharge Valve
Suction Valve
Equalization Valve (Pressurization)
Equalization Valve (Decompression)
Defrost Oil Recovery
SV1 ( SVD1 )
SV4 - 6 ( SVS )
SV2 ( SVB2 )
SV3 ( SVB1 )
IU. Freeze
Prevention
Close
Open
Close
Open
Close
Close
Close
Open
Function
SV No.
Compressor Stop
by protection
Close
Open
Close
Open
Vacuuming
Mode
Close
Close
Close
Open
Open
Open
Open
Open
3-7-5 Refrigerant Flow
- Cooling operation -
- Heating operation -
- Preparation for mode changing -
EX) Cooling operation Heating operation
EEV Open EEV Open
EEV Close
The preparation for mode changing takes a little time ( about 6 minutes).
By changing DIP-SW (SET4-3) to ON, the time for the mode selection
controlling will be shorter ( 3 minutes).
If the mode selection control time is short, the soud of refrigerant may
be loud during cool to heat selection control process.
Note:
3-7-4 Solenoid Valve controlling
Open / Close operation in Operation
Open / Close operation in Special operation
03-14
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