Daikin RXYQ96PYDN Service Manual page 68

SiUS34-801A_b
The higher the compressor operating step No., the cumulative refrigerant oil consumption increases.
Outdoor unit actuator
Compressor 1
Compressor 2
Outdoor unit fan 1
Outdoor unit fan 2
Four -way valve (for heat
exchanger selection)
-way
Four valve (for high-
and low-pressure gas
pipe selection)
Electronic expansion
valve (main)
Electronic expansion
valve (subcooling)
Electronic expansion
valve (refilling refrigerant)
Solenoid valve (main
bypass)
Solenoid valve (hot gas)
Solenoid valve (liquid
pipe of refrigerant
regulator)
Solenoid valve (gas
discharge pipe of
refrigerant regulator)
Solenoid valve (drain pipe
of refrigerant regulator)
Solenoid valve (discharge
pipe of refrigerant
regulator)
End conditions
*1: In case of multi outdoor unit system:
Master unit: It conducts the operation listed in the table above.
Slave units: Operating units conduct the operation listed in the table above.
Non-operating units conduct the operation listed in the table above after the Oil returning process.
(Non-operating units stop while in Preparation mode.)
VRVIII R-410A Heat Pump 60Hz
Elect. symbol
Symbol
RXYP
144PTJU
M1C
—
M2C
M1F
—
M2F
Y2S
20SA
Y9S
20SB Y8S
Y1E
EVM
Y3E
Y2E
EVT
Y5E
EVJ Y4E
Y5S
SVE
Y10S
SVP Y4S
SVL Y3S
SVG Y1S
SVO Y7S
SVT Y6S
For any model
Oil return operation
other than that
shown on the left
52Hz+ON
M1C
(Subsequently, constant
low pressure control)
Maintain the number of
compressors that were used
M2C
before oil return operation
M1F
Cooling fan control
—
Y3S OFF
Y2S ON
Y1E 1375pls
Y3E SH control
Y2E 80pls
Y6S ON
Y5S OFF
Y4S 0pls
Y1S 0pls
Y7S 0pls
Y8S 0pls
• After a lapse of 5 min.
or
• TsA - Te<41°F
Special Control
Operation after oil return
52Hz+ON
(Subsequently, constant
low pressure control)
Maintain the number of
compressors that were used
before oil return operation
Cooling fan control
OFF
ON
1375pls
SH control
80pls
ON
OFF
0pls
0pls
0pls
0pls
• After a lapse of 3 min.
• Pe_min<41°F
or
• Pc_max>526.35psi
• HTdmax>212°F
53