Standby - Daikin RXYQ96PYDN Service Manual

SiUS34-801A_b
7.5.2 Pump-down Residual Operation in Heating Operation and
Simultaneous Cooling / 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)
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.
7.6

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
Compressor1
Compressor2
Outdoor unit fan1
Outdoor unit fan2
VRVIII R-410A Heat Recovery 60Hz
Elect.
symbol
Symbol
REYQ REMQ
M1C M1C
—
M2C M2C
M1F M1F
—
M2F M2F
Y1E Y1E When 20SA=ON: 0 pls
EVM
Y3E
Y2E
EVT Y3E 0 pls
Y5E
EVJ Y4E Y2E 80 pls
Y2S
20SA Y3S
Y9S
20SB Y8S Y2S OFF
Y5S
SVE Y6S OFF
Y10S
SVP Y4S Y5S OFF
SVL Y3S Y4S OFF
SVG Y1S Y1S OFF
SVO Y7S Y7S OFF
SVT Y6S Y8S OFF
Elect.
symbol
Symbol
REYQ REMQ
— M1C M1C
— M2C M2C
Ta>86°F: STEP4
— MF1 MF1
Ta≤86°F: OFF
Ta>86°F: STEP4
— MF2 MF2
Ta≤86°F: OFF
Master unit operation
124 Hz+OFF
Fan control
When 20SA=OFF: 1375 pls
When outdoor heat exchanger is
evaporator: ON
When outdoor heat exchanger is
condenser: OFF
• 3 min.
• Pe_min<36.25psi ∗
• Pc_max<453.85psi ∗
or
• Master unit Tdi>230°F
• Master unit Tp>284°F
REYQ72~144P
OFF
OFF
Ta>86°F: STEP4
Ta≤86°F: 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
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Operation
REMQ72P REMQ96·120P
OFF
—
Ta>86°F: STEP4
Ta≤86°F: OFF
—
Special Control
OFF
OFF
—
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