Panasonic CU-8ME1XPK - Page 49

Function PACD011001C2
28 Function Urban Multi “MX1, ME1 Series” Using R-22
1.5.3 Pump Down Start
If the compressor stops running with refrigerant still remaining in the accumulator, in order to prevent wet
operation at the next compressor starting, it will perform pump down start with a completely dry
accumulator, then it will operate normally.
Pump down start should be performed if the unit is in any of the conditions given below when pressure
equalizing control has been completed before start.
If R3T (R3-1T) is less than 95°C and the unit is in any of the following conditions.
‹
Within 10 minutes of the compressor starting
‹
Defrosting or during oil return
‹
Within 20 minutes of completion of defrost or oil return
‹
Outdoor air temperature is less than -5°C (MX1 Series)
‹
Outdoor air temperature (R1T) < 0ºC (ME1 Series)
‹
Oil temperature (R5T) < Te + 10ºC (ME1 Series)
Te : Low pressure equivalent saturated temperature
Operation During
Pump Down Start
Note
1. Note 1: 30Hz (30Hz+OFF) for products produced after Aug. ‘99.
2.
∗
Note 2 : When heating, low pressure < 1.5 kg/cm² (0.147MPa)
→
running frequency 54Hz (54Hz +
OFF)
Low pressure > 1.7 kg/cm² (0.167MPa) [30 sec. continuous]
→
release
‹
Y2S: Hot gas bypass solenoid valve
‹
Y3S: Injection solenoid valve
‹
Y2S: Hot gas bypass solenoid valve
‹
Y3S: Injection solenoid valve
MX1 Series
←
11 min. 30 sec.
→
1 min. 5 min. 30 sec. 30 sec. 4 min. 30 sec.
Compressor 42Hz
(42Hz+OFF)
42Hz
(42Hz+OFF)
42Hz
(42Hz+OFF) Note 1
30~106 Hz+OFF
PI control
∗
Note 2
Outdoor unit EV 0 pulses 0 pulses 0 pulses SH control (Initial
opening 150 pulses)
Outdoor unit fan H tap (H+ON) H tap (H+ON) H tap (H+ON) H tap (H+ON)
Y2S ON ON ON OFF ON/OFF
(LP protection control)
Y3S, Y4S ON ON/OFF
(Td protection control)
ON/OFF
(Td protection control)
ON/OFF
(Td protection control)
ME1 Series
←
11 min. 30 sec.
→
1 min. 5 min. 30 sec. 30 sec. 4 min. 30 sec.
Compressor 42Hz+OFF 42Hz+OFF 30Hz+OFF 116Hz+OFF
Outdoor unit EV 0 pulses 0 pulses 0 pulses 150 pulses
Outdoor unit fan H tap (H+ON) H tap (H+ON) H tap (H+ON) H tap (H+ON)
Y2S ON ON ON OFF ON/OFF
(LP protection control)
Y3S ON ON/OFF
(Td protection control)
ON/OFF
(Td protection control)
ON/OFF
(Td protection control)