When the NetCol5000-A removes the air conditioning humidifier, the steps to maintain the electrode humidifier include (). (multiple choice)

When the NetCol5000-A removes the air conditioning humidifier, the steps to maintain the electrode humidifier include (). (multiple choice)
A . Disconnect the water supply valve and drain valve wiring
B . Remove the drain tank and drain valve component
C . Remove and clean the water supply valve
D . Replace the hardened and brittle hose thoroughly flush the drain

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Answer: ABCD