Diagnosing Mep831 - will not start , no power at panel

[Leonardo82nd]

hello , I’ve had this 831 sitting for a few years (2) now. I have Fully charged batteries, the emergency stop pulled out, the DC breaker pushed in
but it has no power at the panel.
I tested S1 (shown in the photo )
it’s reading 8.56 . I’m not sure If thats normal? what other connections can I check to move forward with diagnosing ? please advise - Thank you

 

[kloppk]

You should have about 24 volts DC at S1-5, not 8.56.

Here is the wiring path from the battery positive to S1-5. Check for 24 volts along the path point by point starting at the battery positive.

Bat+-----Starter Big Terminal-----SR1+----K2-A1-----K13-A1-----P7-17/J7-17---TB5-13B/13A----CB1 Line/CB1-Load----S19-A1/S19-A2----S1-5