Daikin VRV - WII Service Manual page 82

SiUS30-604
Three outside units installation
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
∆GR>0
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Four-way changeover valve for
heat exchanger [Y7S] (For the
application of heat exchanger)
Content of the control of
electronic expansion valve [Y1E]
Function
Master unit Slave unit 1
OFF
(Condenser) (Condenser)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
∆GR>0 ∆GR <0
Slave unit 1
Master unit
OFF
(Condenser) (Condenser)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
∆GR>0 ∆GR <0
Master unit
Slave unit 1
OFF
(Condenser) (Evaporator)
Control of heat exchange
0 pulse
capacity balance
∆GR>0 ∆GR <0
Master unit Slave unit 1
OFF
(Condenser) (Evaporator)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
∆GR>0 ∆GR <0
Slave unit 1
Master unit
OFF
(Condenser) (Evaporator)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
Master unit Slave unit 1
ON
(Evaporator) (Condenser)
Control of heat exchange
0 pulse
capacity balance
∆GR>0 ∆GR <0
Master unit Slave unit 1
ON
(Evaporator) (Evaporator)
Control of heat exchange Control of heat exchange
capacity balance capacity balance
∆GR>0 ∆GR <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 OFF
(Condenser)
0 pulse
Slave unit 2
ON ON
(Evaporator)
0 pulse
Slave unit 2
ON ON
(Evaporator)
Control of heat exchange
capacity balance
Normal Control
Note 1: ∆GR =Target of heat exchange
capacity balance – Actual
measurement of heat
balance
∆GR >0: Insufficient evaporation
(Excessive condensation)
∆GR <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.
∆GR<0
69