Mitsubishi Electric s-AIRME-G02 Instructions For Installation, Use And Maintenance Manual page 104

Replacement of the PAC-IF interface cards
If the board is faulty and needs to be replaced, make all the electrical connections as on the original board.
Make sure to also set the DIP SWITCHES on the new PAC-IF interface card as illustrated below.
The DIP SWITCHES of the SW1, SW2, SW3, SW6 must be set in the same way for all the PAC-IF interface cards in the
switchboard of the s-AIRME-G02/G07 unit.
WARNING:
When the s-AIRME-G02/G07 unit is combined with a
single Mr. Slim unit, dip-switch 8 of SW1 must be in the
OFF position.
Installation, use and maintenance manual 104