Toshiba MCY-MUG0401HSW-E Service Manual page 100

 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 TCCLink
communication settings. Also, the indoor termination resistor 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 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 outdoor unit interface P.C.boards.
3. Turn on the outdoor unit first, then turn on the indoor unit after about 20 seconds.
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 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)
Indoor
Outdoor
Unit 1
controller
0
7
0
7
(Farthest)
Indoor Indoor
Indoor
Unit 2 unit 4
unit 3
controller controller controller
3 3 3 0
0 0 1 0
Un
Un
7 7
Un
1 3 4
1
Un Un
0
(Header) (Follower)
0 0 0 0
0 0 0 0
Un
Un
7 7
Un
1 3 4
1
Un Un
0
(Header) (Follower)
99
SW106
1 2
Indoor
unit 5
I.DN[FC] Communication setting
3
I.DN[1FC] Indoor termination
0
resistor setup
I.DN[12] Line (system) address
7
I.DN[13] Indoor unit address
5
2
I.DN[14] Group address I.DN[14] Group address
I.DN[FC] Communication setting
0
I.DN[1FC] Indoor termination
0
resistor setup
I.DN[12] Line (system) address
7
I.DN[13] Indoor unit address
5
2
I.DN[14] Group address