Solution:
(1)If the unit does not have water drainage pump:
a) Check the water level switch short connect or not, if not, short connect it, if it still not
solves, change the main board
(2)If the unit has water drainage pump:
a) Check the water level switch if it is connected well, inset it firmly; then check the switch is blocked or
not, if it is blocked, replace it, otherwise go to next step
b) Check the connection between pump and main board if it is 220-240V, if it is, change the water pump;
if not, change the indoor main board
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