21
Fig. 22 shows the control system connection. "n" indicates the address number of the communication node. The WRCB panel can support up to 36 communication address
nodes (n=36).
Terminal A and terminal B of the CC2 Accessory are connected to CN2 (or CN3) of the first WRCB wired controller by communication cable; CN3 (or CN2) port of the first WRCB
wired controller is connected to the CN2 (or CN3) port of the second WRCB wired controller. The remaining port of the second WRCB wired controller will be used for connect-
ing it to the following WRCB wired controller.
Fig. 22 for the scheme to follow.
There is no particular sequence for WRCB to be respected in the communication system.
Fig. 23
1
2
1
2
1
2
4
3
S1
S1
1
2
4
3
OFF
ON
CN1
Fig. 23 shows schematic diagram of DIP switch. There is a 2-bit DIP switch on the main board of wired controller WRCB. As for the last #n wired controller in the control system,
the 1-bit and the 2-bit of the DIP switch should be manually pulled to position “on” and position “off” respectively. The DIP switches of other wired controllers should be kept
at the initial ex-factory status (1-bit and 2-bit are set at position “off”.
ATTENTION!
Please pay special attention to the following notes during the connection to avoid the malfunction of the air conditioning unit due to electromagnetic interference.
1.
Separate the signal and communication lines of the wired controller from the power cord and connection lines between the indoor and outdoor unit, with a minimum
interval of 20cm, otherwise the communication of the unit will probably work abnormally.
2.
If the air conditioning unit is installed where is vulnerable to electromagnetic interference, then the signal and communication lines of the wired controller must be the
shielding twisted pair lines.
5.3 DISMANTLEMENT OF THE WIRED CONTROLLER
1
3
4
2
