Cool/Heat Mode Changeover - Daikin VRV EMERION REYQ-AATJA Service Manual

SiUS372201EB
2.6

Cool/Heat Mode Changeover

Set Cool/Heat Separately for Each Branch Selector Unit by Cool/Heat Selector.
Set remote controller changeover switch DS1-1 as following:
 Set the DIP switch (DS1-1) on printed circuit board (A1P) as shown below before turning on the
When using cool/heat selector, connect to the terminal A, B and C on the PCB of the electrical
component box.
EXAMPLE OF TRANSMISSION LINE CONNECTION
 Example of connecting transmission wiring.
Connect the transmission wirings as shown in the figure below.
Outdoor unit
TO IN/D UNIT TO OUT/D UNIT
F1 F2 F1 F2
A
B
F1 F2 F1 F2
IN/D OUT/D.BS
C
Branch Selector unit A
F1 F2 F2
F1
Part 5 Field Settings and Test Operation
power to the Branch Selector unit.
In case of the indoor unit connect as the cooling only unit, it wire
the terminal
F1
IN/D
To the indoor unit where
the selection of heating
and cooling is available.
Branch wiring
Use 2-core wires.
(There is no polarity.)
F1 F2 F1 F2
OUT/D.BS
IN/D
Branch Selector unit B
F1 F2
COOL/HEAT
selector
ON
Turn on DS1-1.
OFF 1
of the last Branch Selector unit.
F1 F2
OUT/D.BS
F2 F1 F2
F1 F2
OUT/D.BS
Final Branch
Selector unit
1st unit
Cool/heat selector remote
control wiring
Use 3-core wires.
(Keep in mind the polarity.)
A
B
F1
C IN/D
Final Branch Selector unit
F1
COOL/HEAT
selector
Field Setting from Outdoor Unit
DS1 (A1P)
2 3 4
F1 F2
Final unit
Cooling Only
A
B
F2 F1 F2
OUT/D.BS
C
F1
F1
F2
COOL/HEAT
selector
Indoor unit for cooling
F2
F2
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