Here are my numbers via my TFT-100 and K-1776:
FC: 1.5 (was 3.5 two days ago...2.5 yesterday)
My HotSprings Grandee was delivered in Nov 2013. I've been babysitting it ever since. From day one, it never seemed like it produced a sufficient amount of chlorine. I've tried shocking. I've done the Spa System Flush when I changed the water.
I'm a stay-at-home-dad (some days a blessing...some days a curse), so I have time to check the tub every day. I've come to the conclusion that I'm basically performing the dichlor-bleach method in place of the Ace system.
I've read other posts where the output was set too high and people "forgot" to set lower and their spa had very high levels of chlorine. This has NEVER happened to me.
My neighbor has a Grandee that is now 4 years old. He was having problems with rusting jet rings and pumps going bad. He replaced his cell and then the circulation pump started leaking. He asked me to come over while the tech was replacing the pump (neighbor out of town). I spoke to the tech and he just kept saying these thing happen due to "bad water chemistry". I took a sample and tested it. FC was 31 ppm!!! I tested 3 times. I set the size and output to 1. Size was at 8, output was at 1. Upon his return, my neighbor said that the tech had already set the chlorine output to "low". I told him, that to reduce output further the tech should have reduced the size number in addition to the output. I was amazed that the tech did not test the water when he was replacing the pump. This makes me question the competency of the dealer. NOTE: I got my neighbor to invest in a good test kit and recommended TFP.
I have not contacted the dealer because they charge $95 to come out. Even if it is warranty. I'm out of warranty, so that is not a factor. I thought I would try TFP before contacting the dealer.
Anyway, the confusing part is that my spa control panel always reports that everything is fine. Salt level is fine. System is functioning.....everything is OK.
Visual inspection of the chlorine generator in the filter cabinet shows no build up. I can see through the unit and the plates are clean. I tried "cleaning" them per instructions. I dip it and saw absolutely no bubbles...so I removed after about 10 seconds and rinsed.
So what could it be? My spa is newer than my neighbors, so I don't have the size variable.
How does the size variable get set? I'm thinking that perhaps the size variable is set too low for my spa.
Is there a way I can determine this?
Is there a "secret" combination of control buttons that I can press to access the size variable?
My FC is 1.5 today. If I would initiate "boost", I would probably get FC of 2 or 2.5 tomorrow (nobody in spa during boost period). This tells me the unit if producing chlorine...just not very much.
I've attached pictures that might help with a diagnosis.
Any thoughts or suggestions are greatly appreciated.