Daikin VRV-WIII RWEYQ72PTJU Service Manual page 62

Normal Control
Three condensing units installation
Four-way valve for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way valve for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way valve for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way valve for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
DGR > 0
Four-way valve for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way valve for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way valve for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way valve for heat
exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
54
Master unit Slave unit 1
OFF
(Condenser) (Condenser)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
DGR > 0 DGR < 0
Master unit Slave unit 1
OFF
(Condenser) (Condenser)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
DGR > 0 DGR < 0
Master unit Slave unit 1
OFF
(Condenser) (Evaporator)
Control of heat exchange
0 pulse
capacity balance
DGR > 0 DGR < 0
Master unit Slave unit 1
OFF
(Condenser) (Evaporator)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
DGR > 0 DGR < 0
Master unit Slave unit 1
OFF
(Condenser) (Evaporator)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
Slave unit 1
Master unit
ON OFF
(Evaporator) (Condenser)
Control of heat exchange
0 pulse
capacity balance
DGR > 0 DGR < 0
Master unit Slave unit 1
ON
(Evaporator) (Evaporator)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
DGR > 0 DGR < 0
Master unit Slave unit 1
ON
(Evaporator) (Evaporator)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
Slave unit 2
OFF OFF
(Condenser)
Control of heat exchange
capacity balance
Slave unit 2
OFF OFF
(Condenser)
0 pulse
Slave unit 2
ON ON
(Evaporator)
0 pulse
Slave unit 2
ON ON
(Evaporator)
0 pulse
Slave unit 2
ON ON
(Evaporator)
Control of heat exchange
capacity balance
Slave unit 2
OFF
(Condenser)
0 pulse
Slave unit 2
ON ON
(Evaporator)
0 pulse
Slave unit 2
ON ON
(Evaporator)
Control of heat exchange
capacity balance
Note 1: DGR = Target of heat exchange
capacity balance – Actual
measurement of heat
balance
DGR > 0: Insufficient evaporation
(Excessive condensation)
DGR < 0: Insufficient condensation
(Excessive evaporation)
2: Control of heat exchange capacity
balance
Control the electronic expansion
valve so that Te or Tc will obtain the
target value.
DGR < 0
Function and Control
SiUS30-1301