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Procedure to clear the communication method (restoring the factory default [TCC-Link
communication settings])
• This is a function in which the communication method setting for all the outdoor units and indoor units (every
outdoor unit connected to the Uc line and every indoor unit connected to the Uv line) will reset to the TCC-
Link communication settings. Also, the indoor terminal resistance settings for every indoor unit will be set back
to OFF.
• The addresses for the indoor units (indoor address, line address, group address, and the zone address) will
not be cleared.
• This function is also effective with unaddressed indoor units if connected to the Uv line.
• This function will not be available if there are no indoor units that can communicate with the outdoor unit.
There must be at least one indoor unit that can communicate with the outdoor unit (in which the
communication method is matched with the outdoor unit and its address is already set) to use this function.
This function is available even if the communication method settings for the indoor unit and outdoor unit in the
same system of TCC-Link and TU2C-Link coexist. The settings for the header outdoor unit to be operated can
be either TCC-Link communication settings or TU2C-Link communication settings.
[Operation method]
1. Turn off indoor units first, and then turn off outdoor units.
2. Turn on DIP switch 2 of SW106 on the header outdoor unit interface P.C.boards.
3. Turn on the outdoor unit first, then turn on the indoor unit after about 20 seconds.
(Turn on the header unit, and then 20 seconds or more later, turn on the follower units and indoor units.
If the follower units cannot be turned on after the header unit has been turned on, turn on both of them
simultaneously. )
4. The 7-segment display indication " - r S t. - ". Check all the units have turned on more than app
1 minute. Turn off all the indoor and outdoor units.
5. Turn off DIP switch 2 of SW106 on the header outdoor unit interface P.C.board.
<Example> Communication method clear operation in a system with mixed communication
settings
Before communication method clear procedure
O.DN[82] Communication setting
Line (system) address (DIP SW)
After communication method clear procedure
O.DN[82] Communication setting
Line (system) address (DIP SW)
Header
Outdoor
Indoor
Outdoor
2
unit 1
1
controller
0
3
3
0
7
–
7
1
0
0
0
0
0
7
–
7
1
0
(Farthest)
Indoor
Indoor
Indoor
unit 2
unit 4
unit 3
controller controller controller
3
3
0
0
1
0
Un
Un
7
Un
3
4
1
Un
Un
(Header)
0
0
0
0
0
0
Un
Un
7
Un
3
4
1
Un
Un
(Header)
- 130 -
SW106
ON
1 2
Indoor
unit 5
3
I.DN[FC] Communication setting
I.DN[1FC] Indoor termination
0
resistance setup
7
I.DN[12] Line (system) address
5
I.DN[13] Indoor unit address
2
I.DN[14] Group address
(Follower)
0
I.DN[FC] Communication setting
I.DN[1FC] Indoor termination
0
resistance setup
7
I.DN[12] Line (system) address
5
I.DN[13] Indoor unit address
2
I.DN[14] Group address
(Follower)
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Table of Contents
Troubleshooting
