What to do if the Fincor Controller fuse blows when AC line power is applied?
- AAdam OlsenAug 20, 2025
If the controller fuse blows when AC line power is applied, it could be due to several issues: * Faulty or incorrect wiring. Check all external wiring terminating in the controller and correct accordingly. * A grounded circuit, component, or wiring. Remove the ground fault. * Shorted SCRs or Varistor RV1, or Shunt Field Bridge BR1. Replace the shorted components or the control board. * A shorted or grounded motor shunt field. Repair or replace the motor. * Control board failure. Replace the control board.
