Daikin VRV II Series, Design, Installation & Testing Instructions, Page: 106 / 242

Test Operation Si39-303
100 General Information
[Operation procedure detail]
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After turning the respective remote switch of indoor and outdoor units off and charging the
refrigerant, turn on the power of indoor and outdoor units.
Do not fail to turn the power off and charge the refrigerant with outdoor unit in stop mode
before adding the refrigerant following this procedure, otherwise resulting in trouble.
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Fully open the stop valve on the gas side and oil equalizing valve for multi outdoor
connection, and do not fail to fully close the stop valve on the liquid side. (If the stop valve on
the liquid side is open, the refrigerant cannot be charged.)
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In Setting mode 2 (H1P : ON) with outdoor unit in stop mode, Set “A Additional refrigerant
charging operation” switch to ON to start the operation. (H2P turns to display TEST
OPERATION (blinks), and “TEST OPERATION” and “IN CENTRALIZED CONTROL” are
displayed on the remote controller.)
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When the refrigerant is charged up to the specified amount, press the RETURN button
(BS3) to stop charging.
The charging operation is automatically stopped after operating for a maximum of about 30
minutes.
If the charging is not complete within 30 minutes, set the A Additional refrigerant charging
operation again to start charging. When the charging immediately stops even by restarting,
the refrigerant is charged excessively. The refrigerant cannot be charged any more.
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Do not fail to fully open the stop valve on the liquid side as soon as disconnecting the
refrigerant charging hose.
(The piping may be burst due to the liquid sealing.)
[Operation state]
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Compressor frequency : 210Hz
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Y1S, Y2S, Y3S Solenoid valve : Open
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Outdoor unit fan : High pressure control
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Indoor unit expansion valve (All unit) : 1024 pulse
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Indoor unit fan : H tap
4.4.2.5 Setting of Refrigerant Recovery Mode
When carrying out the refrigerant collection on site, fully open the respective expansion valve of
indoor and outdoor units
[Operation procedure]
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In setting mode 2 with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode”
to ON. The respective expansion valve of indoor and outdoor units are fully opened. (H2P
turns to display “TEST OPERATION” (blinks), “TEST OPERATION” and “IN CENTRALIZED
CONTROL” are displayed on the remote controller, and the operation is prohibited.
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Collect the refrigerant using a refrigerant recovery unit. (See the instruction attached to the
refrigerant recovery unit for more detal.)
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Press Mode button “BS1” once and reset “Setting Mode 2”.