Battery Charger Failure
Honeywell
Onboard battery charger not supplying proper float voltage
Controller indicates 'Charger Failure' or battery does not maintain charge despite normal operation.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed charger module on control board, Blown DC fuse, Loose AC supply to charger, Damaged charger wiring harness
How to Fix / Troubleshooting
Safety first: Turn OFF the generator and disconnect AC utility feed to the unit. Disconnect battery negative before accessing control electronics.
Steps:
- Check fuses: Locate the DC fuse or charger fuse on the control panel. Test with a meter and replace if open with the same rating.
- Verify AC input: Confirm that the generator's control circuit is receiving utility AC (check the small control breaker or fuse feeding the charger).
- Measure charger output: With AC restored and battery connected, measure voltage at the battery. If it remains at or below resting voltage (~12.4V) and does not rise, the charger is likely faulty.
- Inspect harness: Check the wiring harness from the charger/control board to the battery for damage or loose connectors.
- Replace charger: Replace the charger module or entire control board assembly with the correct Honeywell part if no output is present.
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Repair Difficulty
Hard
4/5
Required Part
Battery Charger Module
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