Mitsubishi Electric CITY MULTI PAC-YT52CRA Installation Manual page 5

4 How To Wire Transmission Line
The wiring is different when the remote controller is connected to a CITY MULTI control system ("-A"
type and later) and when it is connected to a Mr. SLIM air conditioner (A control type). The wiring also
differs with the system configuration. Check the system used.
1. Connecting to CITY MULTI control system
The numbers (1) to (4) in the figure correspond to items (1) to (4) in the following description.
Address = 51
Group 01
a
Address = 01
TB7 TB3
TB5
(1)
Address = 55
a
Address = 08
TB7 TB3
TB5
f
(1)
g
Group 04
(1) Wiring from the remote controller
• Connect to the MA remote controller terminal block (TB15) on the indoor unit.
• The terminal block has no polarity. Connect to the terminal block at the rear bottom of the remote
controller.
(2) Operating in a group (Groups 03, and 04 above)
• Interconnect the MA remote controller terminal block (TB15) of the indoor units you want to
operate as a group, and connect the MA remote controller to that point.
• When the remote controller is used in combination with the system controller as shown in the
figure above, group setting at the system controller (central controller in the figure above) is
necessary.
(3) Number of connectable remote controllers (groups 02 and 04)
• A main remote controller and one sub remote controller, a total of two, can be connected to a
group made up of indoor units.
NOTE: When using this Simple MA remote controller in combination with other MA remote
controllers, be sure to follow the compatibility rules below.
Indoor unit function
Models applicable for
AUTO (dual set point)
mode
Models not applicable for
AUTO (dual set point)
mode
Group 02
Address = 02
b b
TB15 TB5 TB15
(1)
d d e
(3) (3)
Address = 07
b b
TB15 TB5 TB15
(1)
d e
(3)
Main remote
controller
This Simple MA
remote controller
Other MA remote
controllers
This Simple MA
remote controller
Combination with all of the above
Group 03
Address = 03 Address = 04
Address = 09
b b c
TB5 TB15 TB5 TB15 TB5 TB15
(1)
(2)
d
(2)
(3)
Address = 06 Address = 05
b b
TB5 TB15 TB5 TB15
(2)
Sub remote Compatibility
controller
This Simple MA Compatible, and AUTO (dual set
remote controller point) mode can be used depending
on the indoor units to be connected.
This Simple MA Compatible, but AUTO (dual set
remote controller point) mode cannot be used.
Other MA remote Incompatible
controllers
Compatible
– 5 –
Connect to TB15
on the indoor unit.
(4)
a Outdoor unit
b Indoor unit
c LOSSNAY or
OA processing unit
d Main Remote Controller
e Sub Remote Controller
f Central controller
g Power supply unit for
transmission line