Controller indicates EXERCISE NOT RUN or MISSED EXERCISE; generator has not performed its scheduled weekly test.

Safety first: Ensure the area around the generator is clear. The unit may start automatically during testing.

• Verify controller mode: Confirm the Guardian controller switch is set to AUTO, not OFF.
• Check battery status: Inspect battery voltage and charger operation; correct any LOW BATTERY issues.
• Reprogram exercise time: Use the controller menu to set the correct day and time for the weekly exercise per the Guardian manual.
• Manual test: Initiate a manual exercise run to confirm the unit starts and runs properly.
• Controller replacement: If the clock will not keep time or exercise will not schedule, the controller module may need replacement by a technician.