(1)Wrong connection. (2)Loosened terminal screws.

Check Points Solutions Applicable Products
Is the wiring to the load correct? (For example, +V and -V are connected reversely). Correct the connection. All Series
Check to see if the wiring to the load shorted together accidentally. Correct the problem by checking the wiring isolation. All Series
Terminal screws have loosened? Tighten the terminal screws. All Series

Technical Product-related Inquires