Hi sir: 86 mean: Problem: 1) discrepancy does exist between the output of both cutting circuit channels (hardware channel LED V2 and V3 KK are lit up permanently: Test : a) Check voltage + 42 V on plug CU 9.2 (safety bolt) b)Check basic conditions of LED’s V14- V18 HK if one of this are LED's are lit up Remedy: Replace HK board c) LED’s Vl - V3, VI9 and V23 IAR (if NOT according) replace IAR d) Check connection AR - IAR (flat wire harness) Exchange card AR o KK