Daikin VRV II REYQ8MY1B, Service Manual

Page: 81 / 309

Special Control Si39-306
70 Function
3.1.2 Startup Control in Heating 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 REYQ16M.
3.1.3 Pressure Equalizing Startup Control
∗
In the case of multi-outdoor-unit system, both master and slave units perform the operations listed in the table above.
Actuator Operation Remarks
Compressor Differential pressure control
Compressor operating frequency
increases by 1 step until Pc - Pe > 0.4 MPa.
Outdoor unit fan STEP9

Four way valve 1 ON

Four way valve 2 OFF

Main motorized valve (EV1) 180 pls

Sub motorized valve (EV2) 1400 pls

Sub-cooling motorized valve (EV3) 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.
Receiver gas charging valve (SVL) OFF

Receiver gas discharge valve (SVG) OFF

Discharge pipe stop valve (SVR) ON

Non-operating unit liquid pipe stop
valve (SVSL)
ON

High pressure gas pipe pressure
reduction valve (SVC)
OFF

Ending conditions
•
200 sec.
•
Pc - Pe>0.4 MPa
Actuator Operation
Compressor 74 Hz+ OFF + OFF
Outdoor unit fan STEP 8
Four way valve 1 ON
Four way valve 2 OFF
Main motorized valve (EV1) 180 pls
Sub motorized valve (EV2) 1400 pls
Sub-cooling motorized valve (EV3) 0 pls
Hot gas bypass valve (SVP) OFF
Oil equalization valve (SVO) ON
Receiver gas charging valve (SVL) OFF
Receiver gas discharge valve
(SVG)
OFF
Discharge pipe stop valve (SVR) OFF
Non-operating unit liquid pipe stop
valve (SVSL)
ON
High pressure gas pipe pressure
reduction valve (SVC)
OFF
Ending conditions
•
200 sec.
•
Pc - Pe>0.4 MPa
or
or