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Function
PACD011001C2
254
Function Urban Multi “MX1R, ME1R Series” Using R-407C
1.12
Pump Down Residual Operation
If refrigerant is remaining in the accumulator when the compressor starts, liquid refrigerant is sucked into
the compressor, diluting the refrigerant machine oil and reducing the lubricating performance. To prevent
this, the pump-down operation discharges refrigerant from the low pressure side when the unit is not in
operation.
Residual operation may be carried out for Max.10 minutes under the following conditions.
1.
2. When the thermostat is ON during residual operation, residual operation is not carried out if the total of
1+2+3 is 10 minutes or more.
∗
When outdoor temperature (R1T) is less than -5°C and a stop command is reseived from the
thermostat sensor, etc., residual operation is carried out for 10 minutes without fail. (Operation may
however stop for discharge pipe or high/low pressure safety.)
Outdoor Unit
Function
Notes:
„
During defrost or oil return, residual operation is not carried out even if a stop command comes.
„
Forced thermostat OFF occurs if defrost or oil return signal comes during residual operation.
&
Secondary side heat exchanger 4 way valve (Y2R) is ON.
Discharge pipe thermistor (R3-1T) on inverter side: 95°C or lower
OR
Outside air temperature thermistor (R1T) < 0°C
When compressor continuous operating time is less than 10 minutes and thermostat is OFF, or
when stop command is received from remote controller
Within 20 minutes after defrost or oil return operation
R5T (oil temperature)
≤
Te+15
Thermostat
Compressor and
outdoor unit fan
Max. 10 min.
ON
OFF
ON
OFF
Residual operation for 10 min.
Operation may stop during the 10 minutes
residual operation due to protection discharge,
high/low pressure, etc.
(VL006)
Thermostat
Max. 10 min.
Max. 10 min.
Compressor and
outdoor unit fan
Residual
operation
Residual operation not carried out
if 1 + 2 + 3 is 10 minutes or more.
ON
OFF
ON
OFF
(VL007)
Thermostat
ON
1
2
3
Outdoor air (R1T)
Compressor
Electronic
expansion valve
Pressure equalizing
Solenoid valve
Time
INV
STD
R1T < -10°C
86Hz
OFF
0~300 pulses
ON or OFF
10 min.
-10°C
≤
R1T < 0°C
76Hz
OFF
0~300 pulses
ON or OFF
10 min.
R1T
≥
0°C
62Hz
OFF
0~300 pulses
ON or OFF
10 min.
Summary of Contents for Urban Multi MX1R Series
Page 13: ...PACD011001C2 xii Table of Contents ...
Page 23: ...PACD011001C2 2 Urban Multi MX1 ME1 Series Using R 22 ...
Page 125: ...Test Operation PACD011001C2 104 Test Operation Urban Multi MX1 ME1 Series Using R 22 ...
Page 155: ...Test Operation PACD011001C2 134 Test Operation Urban Multi MX1 ME1 Series Using R 22 ...
Page 239: ...PACD011001C2 218 Urban Multi MX1R ME1R Series Using R 407C ...
Page 245: ...Outline PACD011001C2 224 General Information Urban Multi MX1R ME1R Series Using R 407C ...
Page 293: ...Function PACD011001C2 272 Function Urban Multi MX1R ME1R Series Using R 407C ...
Page 343: ...Test Operation PACD011001C2 322 Test Operation Urban Multi MX1R ME1R Series Using R 407C ...
Page 427: ...PACD011001C2 406 UM Combination MA1R Series Using R 407C ...
Page 433: ...Product Outline PACD011001C2 412 General Information UM Combination MA1R Series Using R 407C ...
Page 501: ...Test Operation PACD011001C2 480 Test Operation UM Combination MA1R Series Using R 407C ...
Page 586: ...PACD011001C2 Wiring Diagrams Outdoor Unit Appendix 565 CZ 100 160HR1HE ...
Page 590: ...PACD011001C2 Wiring Diagrams Outdoor Unit Appendix 569 CZ 100 160HR1HP ...
Page 592: ...PACD011001C2 Wiring Diagrams Outdoor Unit Appendix 571 PA 24 26 28 30MA1XPK ...
Page 594: ...PACD011001C2 Wiring Diagrams Indoor Unit Appendix 573 CS 40 50 80 125LMHPP ...
Page 596: ...PACD011001C2 Wiring Diagrams Indoor Unit Appendix 575 2 3 Corner Type CS 25 32 40 63DM1HPK ...
Page 598: ...PACD011001C2 Wiring Diagrams Indoor Unit Appendix 577 CS 80 100 125FMHPP ...
Page 600: ...PACD011001C2 Wiring Diagrams Indoor Unit Appendix 579 CS 200 250EMHPK ...
Page 601: ...Wiring Diagrams Indoor Unit PACD011001C2 580 Appendix 2 6 Ceiling Type CS 32 63 100TMJPL ...
Page 604: ...PACD011001C2 Wiring Diagrams Indoor Unit Appendix 583 2 9 Small Duct Type CS 20 25NM1HPP ...