Regarding the issue of solenoid valves blowing fuses
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It’s a low-power solenoid valve, consuming around 4W, but the fuses keep blowing recently. The cable insulation has been checked and found to be fine – what other factors could cause the fuses to blow? If the solenoid valve or the valve gets stuck, could there be high power in the circuit at the moment the valve is opened or closed, resulting in a fuse blowing?
Try replacing the solenoid coil or replacing it entirely.
Check the solenoid valve terminals and plugs.
Solenoids are inductive electronic devices; it is recommended to use slow-blow fuses. What is the capacity of your fuse at the moment?
It’s probably not a problem with the insurance capacity; 2A is more than enough, so check something else instead.
This is a quite typical question; it’s good! It’s strange! When was this circuit or this solenoid valve put into use?
Check whether there is leakage current due to insufficient insulation of the solenoid valve circuit with respect to ground.
There are debris inside the solenoid valve core, which causes sticking in the switching action and leads to excessive current flow, especially in the 220V AC coil. If the insurance capacity is increased blindly, the coil will burn out.