Dear Sir:
I just want to say to L5 means many things.
1)You must check socket wiring from upper board(display) vs lower board(controller motor board)
2)Short circuit in capacitor(EMI) in input circuit or Short circuit in Main Motor Test.
3)Faulty Controller Motor Board-Replace.
4)Realign Sensor Speed Motor and clean or Replace
Since the Controller Motor Board control 90% function in Treadmill , will the most probably cause, after you did Test all Step before mentioned. And strong concluded the Lower Board is Faulty.
sincerely.
If you need further assistance, please reach me.
E.CUADRA
MANAGUA,NICARAGUA. C.A.
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