![background image](http://html1.mh-extra.com/html/daikin/vrv/vrv_service-manual_3271580240.webp)
HRV-Related
Si30-408
236
Appendix
7.3
Examples of Mistakes in Wiring and System Designing
7.3.1 It is Necessary to Install the Remote Controller for the Transmission
Line.
<Part 1>
When you connect the transmission line for the remote controller, the remote controller
should be installed on the transmission line.
Example of
Control Wiring
Reason
Because the signal through the transmission line is originated from the remote controller, there
is no transmission signal to operate the units, if the remote controller is not installed.
7.3.2 The Centralized Transmission Line should be Connected to the
Indoor Unit.
<Part 2>
If the HRV unit is interlocked to the centralized controller, the central transmission line
should be connected to the terminal no. F1 and F2 of indoor unit.
Example of
Control Wiring
Reason
The information from the indoor unit cannot be transmitted to the central controller through the
HRV unit. And also the information from the central controller cannot be transmitted to the
indoor unit through the HRV unit.
X9A
X14A
X15A
X17A
X10A
X11A
J1 J2
F1 F2
P1 P2
JC
SS1
F1 F2
P1 P2
(HC0041)
Indoor unit
HRV unit
No remote controller
X9A
X10A
X11A
J1 J2
F1 F2
P1 P2
JC
SS1
F1 F2
P1 P2
P1 P2
(HC0042)
To central controller
Centralized transmission line
Indoor unit
HRV unit
Remote controller
for indoor unit