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GENERATORCODES

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RS home standby display

46

Generator set overload

Electrical · Shutdown

Fault code 46. Causes in the RS20 manual are loads, wire connections, and windings. Corrections: reduce loads that draw high starting current, such as air conditioners; service the air filter; then dealer service.

Seen on: Cummins RS-series home standby sets covered by the RS20 operator manual. QuietConnect RS13A–RS20AC operator manual A053X174 repeats these fault code numbers.

Likely causes

  • Too much running or starting load.
  • Air filter restriction the manual lists under this code.
  • Connections or windings.

Checks an owner can do

  1. Remove air conditioners and other large loads.
  2. With the engine off, service a visibly blocked air filter the way the owner manual describes.

When to call a pro

If code 46 returns unloaded, windings and connections are a Cummins dealer job.

Source

Cummins RS20 home standby operator manual, section 5 (fault codes and blink pattern). The same code numbers are listed in operator manual A053X174 for the RS13A, RS17A, RS20A, and RS20AC QuietConnect sets.

Wording follows that document. Firmware can change a threshold. If this page and the manual shipped with your unit disagree, follow the manual.

What fixed mine

No approved reports for this code yet. Send one. It stays in the review queue until it is approved.

Related Cummins codes

https://generatorcodes.com/brand/cummins/46