給湯器ノーリツecoジョーズの920エラーの闇！徹底究明します。中和器丸洗いで290エラーも完全解決します。

I removed the neutralizer and checked its actual condition. Was the water highly acidic due to a neutralizer error? No, that's not the case. Drain water is almost as slightly acidic as rainwater. Even if the 920 error appears, it doesn't mean the neutralizer has reached the end of its life. It can still be used without any problems if thoroughly washed. I'll explain in detail how to remove, clean, and reassemble it, which will also help resolve the 290 error. This water heater is a Noritz GT-C2052AWX EcoJozu 20-type, and after about 10 years of use, the 920 error indicating the neutralizer's end of life appears. If this error is ignored, it will become the 930 error, causing the hot water function to stop. I erased the neutralizer data manually using the remote control, as shown in the video below.    • ノーリツ エコジョーズ給湯器が故障！中和器寿命で給湯器交換40万円 920エラー 9...   However, I noticed brown, rust-like scale building up on the neutralizer, so I decided it would be a good idea to clean it. It's rust-like in color, but I think it's not rust; it's carbonized material like oil smoke or soot. Although the 290 error indicating a clogged neutralizer was not occurring, the electrode detecting it was also dirty, so I took preventative measures to prevent the 290 error from occurring if I left it unattended. Since the neutralizer was disposable and the lid was not removable, I forcefully poured tap water into the drain inlet and shook the neutralizer to clean it. It still looked pretty clean. The calcium carbonate had barely decreased. This means there were almost no hydrogen ions, which cause the acidity that needs to be neutralized. I think that repeated cleaning like this will keep it usable indefinitely. I also measured the pH to check the neutralizer's performance. The results showed no problems. While the 290 error is common with neutralizers, it's caused by clogged drain hoses or the inside of the neutralizer. Removing the clog caused by freezing or dirt will fix the problem. Also, after 10 years of use, I received a "paid inspection reminder" error (888), but this can be cleared by pressing the power button five times in succession. In my opinion, these errors are unnecessary. Serious errors related to combustion or temperature should be reported, but if trivial errors are reported when there is no indication of a malfunction, this will increase anxiety about what has happened, and the seriousness of the error, which requires a response, will be diluted. Such trivial errors should not be reported. ★Table of Contents 00:00 I reset the 920 error, but is the neutralizer still OK? 00:22 Water Heater Installation Location and Disassembly Begins 01:21 Removing Neutralizer Components 05:14 Removing the Neutralizer Body 06:17 Cleaning the Neutralizer 07:53 Installing the Neutralizer 10:17 Collecting Condensation Water Before and After Neutralization 11:22 Measuring pH to Check the Neutralizer's Effectiveness 12:53 The Neutralizer Is Still Usable 14:11 Clean the Neutralizer When the 290 Error Appears 14:54 Are Neutralizers Even Necessary? 16:21 Neutralizer Life Errors Are Unnecessary, the 930 Error is Excessive 18:27 How to Reset a Neutralizer Error Should Be Made Public [First of all, are neutralizers really necessary? 】 The slime-like substance that accumulates inside the neutralizer is similar to oil smoke. In my case, it turned brown, but it wasn't slimy, and rinsing it with water cleaned it up quite well. If the flow is poor and doesn't improve, you'll get a neutralizer clog error (290), in which case you should replace the neutralizer. However, I've heard of people who have been told that for water heaters over 10 years old, the neutralizers are out of production and the entire water heater needs to be replaced, costing 400,000 yen. I don't think that's a good idea. I'd like the neutralizer to be more versatile and universal. If the Gas and Kerosene Appliance Industry Association is so in control that it standardizes error codes, I'd like to see neutralizers standardized across all manufacturers, both old and new. However, such consumer-oriented standardization is completely unheard of. If that's not possible, I'd at least like to see a maintenance hole drilled in the neutralizer so that the calcium carbonate inside can be cleaned or replaced. However, to begin with, when burning current city gas or propane gas, the drain water does not contain sulfuric acid, so I question whether a neutralizer is really necessary. I actually purchased test strips and a pH meter and repeatedly checked the pH of the drain water, and I also researched the history of EcoJozu. The latent heat recovery gas water heater, called EcoJozu, was commercialized by Takagi Sangyo (now Purpose) in 2000. Amid the trend toward eco-consciousness, it won the Minister of Economy, Trade and Industry Award and the Grand Prize for Technology, and in 2002, various companies in the industry began selling EcoJozu water heaters. About 20 years ago, various companies began producing EcoJozu...