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My problem was finally diagnosed as a bad relay.

Thanks - bought three from Mouser.
When we get them we will test each one and use as spares.

Wrong item.
Mine is NC4D-AC100v, 14 pin.

Can anyone point me toward a source for Matsu****a NC4D-AC100V relays, or equiv.
ebay and Alibaba have listings but they don't seem to be in stock, or one must buy qtys.
I only need 2-3.

Thanks...

The machine has been running nicely for years.
In the middle of a part it halted.
Upon restart everything came up but we have the message at the bottom of the display, "MASTER START REQUIRED".
Of...