Specifications

SiUS39-602 Special Control

Function 49

3.1.2 Startup Control in Heating Operation

Note: ON at starting immediately after power is on.

Actuator

Pressure equalization

before start-up

Starting control

Step1 Step2

Compressor OFF 52Hz + OFF 52Hz + OFF

Outdoor unit fan STEP 4 STEP 7 STEP 7

Four way valve 1 ON ON ON

Four way valve 2 Hold Hold OFF

Main motorized valve (EV1) 0 pls 180 pls 180 pls

Sub motorized valve (EV2) 0 pls 0 pls 1000 pls

Sub-cooling motorized valve (EV3) 0 pls 0 pls 0 pls

Hot gas bypass valve (SVP) OFF ON ON

Oil equalization valve (SVO) OFF OFF OFF

Receiver gas charging valve (SVL) OFF ON ON → OFF

Receiver gas discharge valve (SVG) OFF OFF OFF → ON

Discharge pipe stop valve (SVR) Hold ON OFF → ON

Non-operating unit liquid pipe stop

valve (SVSL)

ON ON ON

High pressure gas pipe pressure

reduction valve (SVC)

Hold

*Note

OFF OFF

Ending conditions 1 min. 5 sec.

• 230 sec.

• Pc - Pe > 58 psi