Daikin RXYQ96PYDN Service Manual page 74

SiUS34-801A_b
Outdoor unit fan 1
Outdoor unit fan 2
Electronic expansion valve (Main)
Electronic expansion valve
(Subcooling)
Electronic expansion valve
(Refrigerant charge)
Four-way valve (Heat exchanger
switch)
Four-way valve (High/low pressure
gas pipe switch)
Solenoid valve (Main bypass)
Solenoid valve (Hot gas)
Solenoid valve (Refrigerant
regulator liquid pipe)
Solenoid valve (Refrigerant
regulator gas vent pipe)
Solenoid valve (Refrigerant
regulator exhaust pipe)
Solenoid valve (Refrigerant
regulator discharge pipe)
Ending conditions
* Pe_min and Pc_max indicate the minimum and maximum values in the system, respectively.
7.5.2 Pump-down Residual Operation in Heating Operation
Actuator
Compressor 1
Compressor 2
Outdoor unit fan 1
Outdoor unit fan 2
Electronic expansion valve (Main)
Electronic expansion valve
(Subcooling)
Electronic expansion valve
(Refrigerant charge)
Four-way valve (Heat exchanger
switch)
VRVIII R-410A Heat Pump 60Hz
M1F
—
M2F
Y1E
EVM
Y3E
Y2E
EVT
Y5E
EVJ Y4E
Y2S
20SA
Y9S
20SB Y8S
Y5S
SVE
Y10S
SVP Y4S
SVL Y3S
SVG Y1S
SVO Y7S
SVT Y6S
Elect. symbol
Symbol
RXYQ
144PTJU
M1C
—
M2C
M1F
—
M2F
Y1E
EVM
Y3E
Y2E
EVT
Y5E
EVJ Y4E
Y2S
20SA
Y9S
M1F
Fan control
—
Y1E 1375 pls
Y3E 0 pls
Y2E 80 pls
Y3S OFF
Y2S ON
Y6S ON
Y5S OFF
Y4S OFF
Y1S OFF
Y7S OFF
Y8S OFF
• 5 min.
• Pe_min<71.05psi ∗
• Pc_max<426.3psi ∗
or
• Master unit Tdi>230°F
• Master unit Tp>257°F
For any model
Master unit operation
other than that
shown on the left
M1C
124 Hz+OFF
M2C
M1F
Fan control
—
When 20SA=ON: 0 pls
Y1E When 20SA=OFF:
1375 pls
Y3E 0 pls
Y2E 80 pls
When outdoor heat
exchanger is evaporator: ON
Y3S
When outdoor heat
exchanger is condenser: OFF
Special Control
Fan control
1375 pls
0 pls
80 pls
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
Slave unit operation
OFF
Fan control
When 20SA=ON: 0 pls
When 20SA=OFF:
1375 pls
0 pls
80 pls
When outdoor heat
exchanger is evaporator: ON
When outdoor heat
exchanger is condenser: OFF
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