Here is the latest from the manufacture Tanabe in Japan....
From: Harumi Tanabe [mailto:firstname.lastname@example.org]
Sent: Friday, July 7, 2017 9:30 AM
Subject: RE: Troubleshooting Casting Machine
Thank you for these information.
Our oldest technician who were in charge of this machine was already retired.
And there is no more really beneficial data about this machine anymore…
However, our technician said that most likely, the blink is lack of water flow.
If you use more than 1.5 liter/min with this machine, the blink might stop.
Another possibility is an error of PLC program for some reason.
In that case… we don’t think it is valuable to use a lot of repair cost for no assured repair because of too old system.