Toshiba MMY-MUP0721FT6P-UL Service Manual page 146

In the case of an increase in address-undefined indoor units
(extension, etc.)
To set up the indoor address of a unit with an address that is undefined due to the extension of indoor units or
replacement of PC board, etc., follow the methods below.
1. Clear the communication setting
Setup procedure
(1) Turn off indoor unit first, and then turn off outdoor units.
(2) Turn on DIP switch 2 of SW106 on the header outdoor unit interface P.C. board.
(3) Turn on the outdoor unit first, then turn on the indoor unit after about 20 second.
(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 approx.
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.
2. Address setting
Method 1
Set up an address individually from a wired remote controller.
(Line address, Indoor address, Group address, Central address)
For the setup method, refer to "Manual address setup from the remote controller." above.
Method 2
Set up an address from the outdoor unit.
* Leave the addresses of the units for which addresses have already been set up as they are. Set up an
address only for the unit where the address is undefined.
Addresses are allocated from lower numbers.
Setup procedure
(1) Turn on the indoor/outdoor power for the refrigerant line for which an address is to be set up.
After approximately 1 minute, check that "U.1. - - -" is displayed on the 7-segment display.
(2) Execute the following operation on the interface PC board of the header unit.
SW01 SW02 SW03
2 14 2
"AUTO1" → "AUTO2" → "AUTO3" → ... → "AUTO9" ... is counted and displayed on the 7-segment display.
(3) When "U.1. - - -" is displayed on the 7-segment display, the setup operation finished.
Turn off the indoor/outdoor power.
After checking that "In.At" is displayed on the 7-segment display, push SW04 for 5 seconds or more.
SW04
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