Ext TH relay oper

What does E.OHT mean?

The inverter output is shut off because an external thermal relay (for motor overheat protection) or an internally mounted motor thermal relay has activated (contacts open). This protective shutdown prevents motor damage from excessive temperature, and is active when '7' (OH signal) is assigned to Pr.178-Pr.184.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Reset the inverter after the thermal relay contacts close; the inverter will not restart automatically until reset.