SiUS39-602 Special Control
Function 55
3.5.2 Pump-down Residual Operation in Heating Operation
Note 1. Hold: maintain the previous position (mode) before entering this operation.
Actuator Operation
Compressor 124 Hz + OFF
Outdoor unit fan STEP8
Four way valve 1 Holds *Note 1
Four way valve 2 Holds *Note 1
Main motorized valve (EV1)
Four way valve 1
OFF:1400 pls
ON:0 pls
Sub motorized valve (EV2)
Four way valve 2
OFF:1400 pls
ON:0 pls
Sub-cooling motorized valve (EV3) 0 pls
Hot gas bypass valve (SVP) ON
Oil equalization valve (SVO) ON
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
• 30 sec.
• Pe < 36 psi
• Td > 230°F
Indoor unit EV opening
Heating:Fully open
Cooling:0 pls
or
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