Countax D Series diesel mower won’t Start?

Countax D Series 50inch Diesel won’t start. Just a click from engine then Fault Code 19-1
It is an old model late 1990 I think, original height adjustment by motor. Not mechanical. Have changed Starter Motor but suspect a faulty sensor somewhere any ideas. Cannot find a fault code list. The machine has always been very reliable. This is an intermittent problem but getting worse. Hope you can help.
Michael, August 2021


Dfgd, August 2021
May help

Dfgd, August 2021
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