Daikin RXYQ96PYDN, Service Manual

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SiUS34-801A_b Special Control
VRVIII R-410A Heat Recovery 60Hz 207
7.5.2 Pump-down Residual Operation in Heating Operation and
Simultaneous Cooling / Heating Operation
*
Pe_min and Pc_max indicate the minimum and maximum values in the system, respectively.
7.6 Standby
7.6.1 Restart Standby
Used to forcedly stop the compressor for a period of 2 minutes, in order to prevent the frequent ON/OFF of the compressor
and equalize the pressure within the refrigerant system.
Actuator Symbol
Elect.
symbol
Master unit operation Slave unit operation
REYQ REMQ
Compressor 1
—
M1C M1C
124 Hz+OFF OFF
Compressor 2 M2C M2C
Outdoor unit fan 1
—
M1F M1F
Fan control Fan control
Outdoor unit fan 2 M2F M2F
Electronic expansion valve (Main) EVM
Y1E
Y3E
Y1E
When 20SA=ON: 0 pls
When 20SA=OFF: 1375 pls When 20SA=ON: 0 pls
When 20SA=OFF: 1375 pls
Electronic expansion valve
(Subcooling)
EVT
Y2E
Y5E
Y3E 0 pls 0 pls
Electronic expansion valve
(Refrigerant charge)
EVJ Y4E Y2E 80 pls 80 pls
Four-way valve (Heat exchanger
switch)
20SA
Y2S
Y9S
Y3S
When outdoor heat exchanger is
evaporator: ON
When outdoor heat exchanger is
condenser: OFF When outdoor heat exchanger is
evaporator: ON
When outdoor heat exchanger is
condenser: OFF
Four-way valve (High/low
pressure gas pipe switch)
20SB Y8S Y2S OFF OFF
Solenoid valve (Main bypass) SVE
Y5S
Y10S
Y6S OFF OFF
Solenoid valve (Hot gas) SVP Y4S Y5S OFF OFF
Solenoid valve (Refrigerant
regulator liquid pipe)
SVL Y3S Y4S OFF OFF
Solenoid valve (Refrigerant
regulator gas vent pipe)
SVG Y1S Y1S OFF OFF
Solenoid valve (Refrigerant
regulator exhaust pipe)
SVO Y7S Y7S OFF OFF
Solenoid valve (Refrigerant
regulator discharge pipe)
SVT Y6S Y8S OFF OFF
Ending conditions
•
3 min.
•
Pe_min<36.25psi
∗
•
Pc_max<453.85psi
∗
•
Master unit Tdi>230
°
F
•
Master unit Tp>284
°
F
Actuator
Symbol
Elect.
symbol
Operation
REYQ REMQ
REYQ72~144P REMQ72P REMQ96·120P
Compressor1 — M1C M1C OFF OFF OFF
Compressor2 — M2C M2C OFF — OFF
Outdoor unit fan1 — MF1 MF1
Ta>86
°
F: STEP4
Ta
≤
86
°
F: OFF
Ta>86
°
F: STEP4
Ta
≤
86
°
F: OFF
Ta>86
°
F: STEP4
Ta
≤
86
°
F: OFF
Outdoor unit fan2 — MF2 MF2
Ta>86
°
F: STEP4
Ta
≤
86
°
F: OFF
— —
or