68
9-11. Main-Sub Remote Controller Control
One (1) indoor unit can be controlled by two (2) wired remote controllers. In the case of using 2 
remote controllers, one of them needs to be designated as the sub remote controller.
Connecting 2 remote controllers to control 1 indoor unit
L/1 N/2
R1 R2
1 2 1 2
3
1 2 3
U1 U2
R1 R2
U1 U2
Remote control wiring
Terminal board for remote control wiring
Indoor unit Indoor unit
Outdoor unit Outdoor unit
Remote controller 
(main)
Remote controller  
(sub)
Optional Optional
Ground Ground
Ground Ground
3-LINE CONNECTION 2-LINE CONNECTION
Remote controller setting mode (CZ-RTC5B)
20:30 (THU)
START
[ ]
(3) (1)
(2)
(1)
(1)   Press and hold the   ,   and   for 4 seconds or 
more simultaneously.
(2)   Select “3. RC. setting mode”.
 
   
→
   
(3)   Select the “Code no.” and  
“Set data”.
 
   
→
   
→
   
RC. Setting mode
Code no. Set data
Sel. Next
20:30 (THU)
0001
01
Code no. Set data
           (Repeat)
Code no. Item
Set data
0000 0001
01 Main/Sub Sub Main
(4)   Press  .
 
●
 After selecting “YES”, the unit restarts.
Remote controller setting mode (CZ-RTC4)
(1)   Press and hold the 
A
 and   buttons for several 
seconds simultaneously.  
(2)   Select the Code no. 
(3)   Select the Set data. 
→ 
  The indicator illuminates after blinking. Press  .
Code no. Item
Set data
0000 0001
01 Main/Sub Sub Main
1. Outdoor unit error data
2. Service contact
4. Test run
Sel. Page [ ] Confirm
3. RC. setting mode
01_330918_EU_Eng.indb   68 2021/9/9   11:27:02