I'm recommend check Safety Signal status.
GS1 and GS2 is meaning General Stop. 1 and 2 is channel.
when that GS1 and GS2 value is 0 will be still happen Event 20206 message.
Terminal is... may be X5 and X6.
ah! You can easier check thru LED lamp.
Yellow LED on is green condition. it place controller's inside of right wall.
it's a simple.
Check X5 and X6 Terminal.
need +24V.
maybe that terminal control by other relay contact.
follow that cable and check relay status.
if u wanna quick fix... Short each cable.
※CAUTION! make sure to connection like a attached picture!
oh, jesus.
Your X5 Terminal Short Pin install status looks bad.
Where the other short_pin???
Stolen? 
X5 mapping
1,2 3 - Short
4,5,6 - Short
7,8,9 - Short
10,11,12 - Short
Anyway, X5 needs 4ea Shot-pin
GS depend on X5Terminal.
So it was previously ok before replacing the "upper arm"? If so, I would be checking for other event messages, especially in the hardware section.
Ahoj,
pomohlo mi to vytáhnout konektor do bezpečnostních karet X5 a X6. Poté potvrďte bezpečnostní obvod.
