- The control wiring is 5 Volt DC, non-polarised, two wire connection notated as 'A1' and 'B1'. This 'AB' wiring connects outdoor unit to indoor unit and indoor unit to indoor unit.
- This wiring must be a 2-core shielded cable size 0.75mm2 or 1.25mm2.
- We recommed the both ends of the shield of the cable are connected to ground (earth) at all the indoor units and outdoor units.
- When plural outdoor units are used; Connect the signal cable between indoor and outdoor units and the signal cable between outdoor units belonging to the same refrigerant line to A1 and B1, Connect the signal line between outdoor units on different refrigerant lines to A2 and B2.
- For current specification of 2-core (AB) wiring, please consult your MHI dealer.
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