KB-8

Title

Voltage measurement through control board or Triac board with disconnect switch turned off

Problem

120 Volt measurement through a single phase control with disconnect off or fan off.

Solution

On an EBC10, EBC12, EBC14, MEC18 & EBC30 (w/ triac board), the fan output terminals will always measure 120V AC if the disconnect is turned off. Without the motor 'connected,' there is no load that brings the measured voltage down to the actual voltage the control is trying to send out through the fan out terminals.

References

None

revised May 17th, 2025 08:58am
keywords: EBC Triac board voltage measurements disconnect switch