Hitachi RAS-25WX8 Manuel De Maintenance page 90
Fig. 2-1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other.
Terminal board
Terminal board
D
C
D
C
Terminal board
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Control P.W.B.
Indoor P.W.B.
Outdoor P.W.B.
(Communications from outdoor microcomputer to indoor microcomputer)
(Communications from indoor microcomputer to outdoor microcomputer)
Fig. 2-1 Indoor/outdoor interface Circuit
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– 89 –
I / F Reception
Microcomputer
I / F Transmission
