Specifications

ManualsBrandsDaikin ManualsClockBRC15A61

101

102

103

104

105

106

107

108

109

110

Special Control Si38-304

96 Function

3. Special Control

3.1 Startup Control

3.1.1 Startup Control in Cooling Operation

∗ In the case of multi-outdoor-unit system, both master and slave units perform the operations listed in the table

above.

∗ Actuators are based on RX(Y)16M.

3.1.2 Startup Control in Heating Operation (H / P model only)

∗ In the case of multi-outdoor-unit system, both master and slave units perform the operations listed in the table

above.

∗ Actuators are based on RXY16M.

Actuator Operation Remarks

Compressor Differential pressure control

Compressor operating frequency

increases by 2 step / 20 sec until

Pc - Pe>0.4 MPa.

Outdoor unit fan High pressure control

Initial compressor operating frequency

is set to STEP 1.

1-step increase with Pc>1.5 MPa

1-step decrease with Pc<1.2 MPa

Four way valve OFF 

Main motorized valve (EV1) 0 pls  (RX(Y)5M : 2000pls)

Subcooling motorized valve (EV2) 0 pls 

Hot gas bypass valve (SVP) ON 

Oil equalization valve (SVO) ON

In the case of multi-outdoor-unit

system, this valve repeats ON/OFF

operation at regular intervals of time to

equalize the oil level of each outdoor

unit.

Receiver gas charging valve (SVL) OFF 

Receiver gas discharging valve (SVG) OFF 

Non-operating unit gas discharging

valve (SVSG)

OFF 

Non-operating unit liquid pipe stop

valve (SVSL)

ON 

Ending conditions

• 200 sec.

• Pc - Pe>0.4 MPa