- 1. If the operation button is not working,
- - Self-check list
- Check whether the charging is completed or not.
- Check whether there is water in the tumbler.
- - Cases to visit service center
- Problem with electrode.
- Lamp malfunction.
- Mal-connection with USB cable circuits etc.
- Causes unknown or undetected.
- 2. If hydrogen rate significantly lower than before
- - Dissolve 3g of citric acid into 350㎖ of water, then run the self-cleaning operation for 5 minutes.