Photovoltaic Direct-driven Inverter VRF
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4.5.3 Connection of power cord
(1) Before obtaining access to terminals, all supply circuits must be disconnected.
(2) If units are type I electrical appliances, they must be reliably grounded.
(3 Ground resistance must be in accord with requirements of local s tandard.
(4) The green-yellow wire within units are ground wire. Do not use it for other purposes. Nor should it be cut
off or secured by tapping screws. Otherwise, it may cause electric shock.
(5) Power supply a t user side must have reliable ground term inal. Do not connect ground wire to the following
places:
1) Water pipe.
2) Gas pipe.
3) Drainage pipe.
4) Other places that are considered by professionals as unreliable.
(6) Power cord and communication wire should be separated, with a distance of m ore than 20cm(7-7/8in.).
Otherwise, system’s communication may not work well.
Steps of power cord connection:
(1) Knock off the cross-
through opening that’s used for leading the external power cord,
with the cross-through rubber ring on the opening. Then lead the cable through the
opening. Connect L1, L2, L3 of power cord and ground wire separately to the positions
on wiring board (for power supply) that are marked with L1, L2, L3 and the ground
screw nearby.
(2) Fasten the power cord with cable tie.
(3) Lay the power cable and communication cable for the ODU according to the marker of
external connection circuit diagram.
4.6 System Communication
4.6.1 Communication system include:
(1) Communication among outdoor basic modules.
(2) Communication between ODU and IDU.
(3) Communication among IDUs.
(4) Communication between IDU and wired controller.
(5) Connection between IDU and light board receiver.
(6) Communication between different refrigeration systems.
(7) Graphics of general communication connection.
(8) Communication among
ODU’s Convertor unit
Summary of Contents for GMV-Y120WM/C-F
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