3)
7kW: Unscrew screw C
，
D on circuit board and G on copper busbar.
Disconnect neutral wire (H), L1(I) and earth wire(L).
22kW:Unscrew screw C, D, E, F on circuit board and G on copper busbar.
Disconnect the neutral wire (H), L1 (I), L2 (J), L3 (K), and the earth wire (L).
4) Unscrew screw N and O which are used to fix hose clamp M.
5) Untighten the water-proof clamp P and pull out the cable.
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