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Replacing Horstmann channel plus NLH27

Joined
18 Sep 2025
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Country
United Kingdom
Hi,
Our Horstmann channel plus NLH27 HW & CH programmer has given up!
Bought a Danfoss FP720 V2.
Attached is pic of the actual wiring from the NLH27 which doesn’t correspond to the NLH27 wiring diagram. So am struggling to wire up the FP720.
Any advice?
 

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The black that is in 1 on the old goes to 3 on the new
The black that is in 5 goes to 4 on the new.
N and L as marked. no links necessary.
Screenshot 2025-09-18 at 23.30.17.png
 

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