Arcbound Field · Field sheet · Power Electronics · PE-NB-COOL
PE-NB-COOLCooling pump Contactor chatter
Power Electronics · NB 360 · Liquid cooling
Verified 2025-11-201 field confirmsSeverity: medium ~60 min
Safety
Qualified EVSE personnel only. Follow site LOTO and OEM HV / arc-flash boundaries. Depressurize coolant loops before opening quick-connects; capture spills. Not a substitute for OEM service manuals or AHJ requirements.
Full procedure requires solo+
Symptom teaser: Cooling pump Contactor chatter on power-electronics (nb-360): NB series HMI / keypad shows PE-NB-COOL. Techs see session abort or stall Unavailable until the ra…
View plans