Daikin VRV III REYQ8PY1B Service Manual page 138

SiBE37-701
3.5.2 Pump-down Residual Operation in Heating Operation and
Simultaneous Cooling / Heating Operation
Actuator
Compressor 1
Compressor 2
Compressor 3
Outdoor unit fan 1
Outdoor unit fan 2
Electronic expansion valve (Main) EVM
Electronic expansion valve
(Supercooling)
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.
Function
Elect.
symbol
Symbol
REYQ REMQ
M1C M1C
— M2C M2C 124 Hz+OFF+OFF
M3C M3C
M1F M1F
— Fan control
M2F M2F
Y1E When 20SA=ON: 0 pls
Y1E
Y3E When 20SA=OFF: 1375 pls
Y2E
EVT Y3E 0 pls
Y5E
EVJ Y4E Y2E 80 pls
When outdoor heat exchanger
Y2S is evaporator: ON
20SA Y3S
Y9S When outdoor heat exchanger
is condenser: OFF
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
or
Master unit operation
• 3 min.
• Pe_min<0.25 MPa ∗
• Pc_max<3.13 MPa ∗
• Master unit Tdi>110°C
• Master unit Tp>140°C
Special Control
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
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