ESiEN09-06 A
Special Control
Function
33
3.4
Pump-down Residual Operation
3.4.1 Pump-down Residual Operation in Cooling Operation
If the liquid refrigerant stays in the Evaporator at the startup of a compressor, this liquid refrigerant enters the
compressor, thus resulting in diluted oil in the compressor and then degraded lubrication performance.
Consequently, in order to recover the refrigerant in the Evaporator while the compressor stops, the pump-down residual
operation is conducted.
3.4.2 Pump-down Residual Operation in Heating Operation
Actuator
Master unit operation
Compressor
124 Hz + OFF + OFF
Outdoor unit fan
Fan control
Four way valve
OFF
Main motorized valve (EV1)
480 pls
Subcooling motorized valve (EV2)
0 pls
Hot gas bypass valve (SVP)
OFF
Accumulator oil return valve (SVO)
ON
Ending conditions
5 min.
Actuator
Master unit operation
Compressor
124 Hz + OFF + OFF
Outdoor unit fan
STEP7
Four way valve
ON
Main motorized valve (EV1)
0 pls
Subcooling motorized valve (EV2)
0 pls
Hot gas bypass valve (SVP)
OFF
Accumulator oil return valve (SVO)
ON
Ending conditions
3 min.
Summary of Contents for ERQ Series
Page 2: ......
Page 16: ...Combination Table ESiEN09 06 A 6 General Information...
Page 17: ...ESiEN09 06 A Specifications 7 1 Specifications 8 1 1 Outdoor Units 8...
Page 33: ...ESiEN09 06 A Function general Function 23 1 2 Operation Mode...
Page 58: ...Outline of Control ESiEN09 06 A 48 Function...
Page 71: ...ESiEN09 06 A Wiring Diagram of Control Box Control Box EKEQ CBV3 61 3 2 F box...
Page 109: ...Test Operation ESiEN09 06 A 100 Test Operation 1 2 2 Turn power on...
