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Resetting the address
(Resetting to the factory default (address undecided))
Method 1
Clearing each address separately using a wired remote controller.
Set the system address, indoor unit address and group address to "00Un" using a wired remote controller.
(For the setting procedure, refer to the address setting procedures using the wired remote controller on the
previous pages.)
Method 2
Clearing all the indoor unit addresses on a refrigerate line at once from the outdoor unit.
1
Turn off the indoor and outdoor units of the refrigerant line to reset to the factory default and set
the outdoor unit of the line as below.
2
Turn on the indoor and outdoor units of the refrigerant line for which you want to initialize the
addresses. About one minute after turning on the power, confirm that the 7-segment display on
the outdoor unit indicates "U.1. - - -" and operate the interface P.C. board on the outdoor unit of
the refrigerant line as follows.
SW01
SW02
SW03
Confirm that the 7-segment display indicates "A.d.buS" and turn
2
1
2
SW04 ON for more than five seconds.
Confirm that the 7-segment display indicates "A.d.nEt" and turn
2
2
2
SW04 ON for more than five seconds.
3
Confirm that the 7-segment display indicates "A.d. c.L." and set SW01, SW02 and SW03 to 1, 1, 1
respectively.
4
After finished clearing the address successfully, "U.1.Err" and "L08" appear alternatively at 1
second intervals on the 7-segment display.
5
Set the addresses again after finishing the clearance.
81-EN
SW04
Clearable addresses
System / indoor unit / group
address
Central control address
– 41 –
9
Communication setting
This product needs setting TU2C-LINK communication after the address setting. Follow the procedure below for
the communication setting. TCC-LINK communication has been set as the factory default.
CAUTION
• Be sure to complete the electric wiring before setting the addresses.
• It may takes approximately 1 to 3 minutes to address one refrigerant line.
• Settings on the outdoor unit are required for communication setting.
(Communication setting is not started simply by turning on the power.)
• If outdoor units for which communication setting has already been made are connected, the setting cannot be
made correctly.
In this case, reset the communication setting and perform the setting again.
• If "L02" is displayed after Communication setting, an indoor unit incompatible with R32 refrigerant is connected.
In this case check whether the connected indoor unit is compatible with R32 refrigerant.
Communication setting
1
Turn on indoor units first, and then turn on outdoor units.
2
Set the rotary switch of the interface P.C. board on the outdoor unit to SW01= [2],
SW02= [16] and SW03= [2].
3
The 7-segment display switches between "c.c. b p s" and "c.c. 0" at 1-second intervals.
4
Push and hold SW04 for more than 5 seconds.
5
The 7-segment display flashes "c.c.i n".
6
The 7-segment display switches between "c.c. i n" and "c.c. * * * " at 1-second intervals.
The number of connected indoor unit is displayed in [ * * * ], so if it is correct, proceed to " 7 ". In
parentheses are the measures to be taken when the number of indoor units is different. (When
the number of the connected indoor units differs from the number of indoor units displayed on
the 7-segment display, clear the communication type setting to eliminate the cause. To clear the
communication type setting, push and hold the SW05 for 5 seconds or more. The 7-segment
display flashes "c.c.r S t".
After a while, the 7-segment display switches between "c.c. b p s" and "c.c. 0".
Set the rotary switch back to SW01 to [1], SW02 to [1] and SW03 to [1].)
7
Push and hold SW06 for more than 5 seconds.
8
The 7-segment display flashes "c.c.b p s".
After that, the setting is complete when the 7-segment display changes to "c.c F i n".
(If the 7-segment display changes to "c.c. E r r ", try again.)
When either a TU2C-LINK incompatible device or indoor unit incompatible with R32 refrigerant is
connected, "L02" will be displayed for 30 minutes. If "L02" is displayed, please check whether the
connected device is a device compatible with TU2C-LINK or A2L refrigerant.
9
After a while, the 7-segment display switches between "c.c. b p s" and "c.c. 1" at
1- second intervals.
When a TCC-LINK compatible device is connected, "L02" is displayed. If "L02" is displayed,
please check whether the connected device is a device compatible with TU2C-LINK.
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