ASCO solenoid valve failure
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How to use a multimeter to diagnose faults in an ASCO solenoid valve with a diode and 24VDC supply? There is a solenoid valve at the site that causes fuses (1A) to blow after being powered on for a day; this has happened for two consecutive days, with two fuses being damaged. Replacing the fuses allows it to function for one day.
First, check whether there is a malfunction in the mechanical components, that is, whether the valve can open and close properly. If there are no issues, measure the DC resistance of the solenoid valve to check whether it matches the specified value. Also, measure the temperature rise to determine the temperature of the solenoid valve part after it has been powered on for half an hour.
The valve is functioning properly; the solenoid coil has diodes
Burning through the insurance at this rate – that’s just wasting it! It seems there’s an issue with the loop impedance; for now, it’s better to replace the solenoid valve first – after all, it’s the impact on the equipment’s operation that matters!
Diodes are generally used for rapid discharge and have little impact on DC resistance.
This should not happen with ASCO solenoids. Possible cause 1: Poor terminal contact. 2. The line grounding is not up to standard. 3. Nearby welding or other construction work is causing interference currents.
I can only think of these two things: whether the power supply is functioning properly, and whether the resistance of the solenoid valve is normal.
Are diodes used to eliminate reverse electromotive force? Can it be removed?
Claimed to be fault-free for a million times – try it in a high-altitude area.
Measure the resistance of the solenoid valve – what is its power rating? 3W?
If it’s confirmed that the solenoid is working properly, try replacing the coil