Service Manual

ST
CV
SV1
SV2
SV3
SV4
SV5
SV6
ST
CP1
CP2
CP3
Close
Close
Open
Open
Open
Open
High Pressure Pipe
Low Pressure Pipe
Indoor unit Gas Pipe
ST
CV
SV1
SV2
SV3
SV4
SV5
SV6
ST
CP1
CP2
CP3
Close
Close
Open
High Pressure Pipe
Low Pressure Pipe
Indoor unit Gas Pipe
When SV4, SV5 SV6 internal blockage or Close position, the refrigerant flow will be lessened,
Indoor unit Gas pipe Temp. > Low pressure pipe temp
ST
CV
SV1
SV2
SV3
SV4
SV5
SV6
ST
CP1
CP2
CP3
Open
Close
Open
Close
Close
Close
High Pressure Pipe
Low Pressure Pipe
Indoor unit Gas Pipe
ST
CV
SV1
SV2
SV3
SV4
SV5
SV6
ST
CP1
CP2
CP3
Close
Close
Close
Close
Close
High Pressure Pipe
Low Pressure Pipe
Indoor unit Gas Pipe
Pipe Temp.
COLD COLD
Low Pressure Pipe
Indoor unit Gas Pipe
Pipe Temp.
COLD Less COLD
Low Pressure Pipe
Indoor unit Gas Pipe
Pipe Temp.
HOT
HOT
High Pressure Pipe
Indoor unit Gas Pipe
Pipe Temp.
HOT
Less HOT
High Pressure Pipe
Indoor unit Gas Pipe
Pipe temperature in Cooling mode
Normal Operation
Possible Cause
Pipe temperature in Heating mode
Normal Operation
Possible Cause
When SV1, blockage or Close position, the refrigerant flow will be lessened,
Indoor unit Gas pipe Temp. < Hi pressure pipe temp
Position of Solenoid coil
SV4
SV4
SV4
SV5 SV1
SV6
SV3 SV2
SV5
SV1
SV3 SV2
SV1
SV3 SV2
UTP-RX01AH
UTP-RX01BH / UTP-RX04BH
UTP-RX01BH
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.
Solenoid valve Controlling
SV1
SV2
SV3
SV4
SV5
SV6
Green
Blue
Black
White
Red
Yellow
Color of Connector
- Check functioning of Solenoid Valve * Valve or Pipe Blockage , Opposite operation of Valves can be the cause of Noise problem.
- Check Solenoid coil position / connection
- Chedk pipe temperautre difference during operation
SERVICE INFORMATION
RB Unit Abnormal (No Cooling, No Heating, Abnormal Noise)
Solenoid Coil resistance
<Refer to the Parts information 26>
04-90
CAUTION: The solenoid coil which has a heat sink is hot.
When you approach the solenoid coil, turn off the power supply for the RB unit and wait until the temperature of coil becomes low.