47
K
Cautions on group control
● Group control within the same refrigerant tub-
ing system is recommended.
[Tubing system which is NOT recommended]
<Example 1> In this system, group control extending
over tubing systems becomes impossi-
ble to set, which means the indoor units
cannot operate.
NOTE
1
2
3
4
Tubing system 2
Tubing system 1
Indoor units
Remote controller
TIMER
TMNL.
RCU
TMNL.
RCU.ADR
RCU.Main
RCU.Sub
RCU.CK
To Service Technicians
To display the sensor temperature:
WARNING
To avoid an electric shock hazard,
DO NOT touch any ter-
minal on the Printed Cir-
cuit Board with a metal rod, a
screwdriver edge or bare hand
when power
is supplied.
Press both and buttons on the
remote controller for more than 4 seconds
together.
Change the sensor address (CODE NO.)
with / (SET TEMP) buttons.
Select the UNIT NO. that you want to call
with button.
Press the button to finish service mode.
To display the trouble history:
Press both and buttons on the
remote controller for more than 4 seconds
together.
Change the alarm message:
/ (SET TEMP) buttons
CODE NO.
Press the button to finish service
mode.
On the remote controller, press
+ + at the same time for
more than 4 seconds.
Set CODE No. with /
(SET TEMP) button.
Set DATA from to
with / (TIMER) button.
Press
Finally, Press
(New) (Old)
Changing method for room
temperature sensor (from Indoor
unit to RCU)
1
2
3
4
Remote Controller (Sub)
Remote controller
address connector
Remote Controller (Main)
Setting the main and sub remote controllers
1. Set one of the 2 connected remote controllers as the main remote controller.
2. On the other remote controller (sub-remote controller), switch the remote controller address connector on the
rear of the remote controller PCB from Main to Sub. When the connector has been switched, the remote con-
troller will function as the sub-remote controller.
Fig. 6-6
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