Multiquip Y0602120903 ECU670 W/FIRMWARE - OEM Replacement Part

The ECU670 with firmware is the electronic control unit that manages all critical generator functions including voltage regulation, engine control, load management, and system monitoring for Multiquip WhisperWatt super silent generators. This advanced controller integrates with the AVR (Automatic Voltage Regulator) system to provide precise excitation current control, ensuring optimal voltage response during heavy load applications and motor-starting operations. The ECU670 maintains voltage stability within ±0.25% through continuous monitoring of three-phase AC output windings, automatically adjusting excitation to the generator's exciter section for maximum motor-starting capabilities.

This control unit comes pre-programmed with firmware specific to WhisperWatt series generators, managing DOC/SCR assembly integration, fuel control systems, and digital display functions. When the ECU fails, symptoms typically include erratic voltage output, inability to maintain stable frequency under load, failure to start, or complete loss of digital display and monitoring functions.

Compatible with the following Multiquip generator models:

• DCA150SSJU4F3
• DCA180SSJU4F3
• DCA220SSJU4F3
• DCA300SSJU4F3
• DCA70SSJU4F

Genuine Multiquip OEM part, sold by an authorized dealer.