What's wrong with my program?

[Slickdonkey]

Ok, there must be something obvious that I'm doing wrong, can anyone spot it? Looking at my Aquanotes log, it appears that my heater and chiller are sometimes running at the same time. I'm using the default season table.

Thanks for any insight!

If Time > 00:00 Then ALM OFF
If Time > 00:00 Then CLP ON
If Time > 00:00 Then RET ON
If Time > 00:00 Then UVS OFF
If Time > 20:00 Then MON ON
If Time > 02:00 Then MON OFF
If Time > 18:00 Then MH1 ON
If Time > 18:00 Then MH2 ON
If Time > 18:00 Then MH3 ON
If Time > 18:00 Then MH4 ON
If Time > 20:00 Then MH1 OFF
If Time > 20:00 Then MH2 OFF
If Time > 20:00 Then MH3 OFF
If Time > 20:00 Then MH4 OFF
If Feed cycle Then RET OFF
If Feed cycle Then CLP OFF
If Temp > RT+0.1 Then FAN ON
If Temp < RT+0.0 Then FAN OFF
Max Change 010 M Then FAN ON
If Temp > RT+0.4 Then CHL ON
If Temp < RT+0.0 Then CHL OFF
Max Change 020 M Then CHL OFF
If Temp < RT+-0.3 Then HT1 ON
If Temp > RT+0.0 Then HT1 OFF
Max Change 002 M Then HT1 OFF
If Temp < RT+-0.3 Then HT2 ON
If Temp > RT+0.0 Then HT2 OFF
Max Change 002 M Then HT2 OFF
If ORP < 380 Then OZN ON
If ORP > 400 Then OZN OFF
If ORP > 450 Then ALM ON
If ORP < 350 Then ALM ON
If Timer MH1 = ON Then CAN ON
If Timer MH1 = OFF Then CAN OFF
If Temp < 50.0 Then HT1 OFF
If Temp < 50.0 Then HT2 OFF
If Temp < 50.0 Then VHO OFF
If Temp < 50.0 Then MH1 OFF
If Temp < 50.0 Then MH2 OFF
If Temp < 50.0 Then MH3 OFF
If Temp < 50.0 Then MH4 OFF
If Temp < 50.0 Then ALM ON
If Temp > 81.5 Then MH1 OFF
If Temp > 81.5 Then MH2 OFF
If Temp > 81.5 Then MH3 OFF
If Temp > 81.5 Then MH4 OFF
If Temp > 81.5 Then ALM ON
If Power Fail Then ALM ON

 

[clp]

I don't see the problem with the chiller, but the fan could definitely be on when the heater is on. You have very tight on/off temperatures, and the FAN has a Max Change 010 M Then FAN ON. The Max change will keep the fan on a minimum of 10 minutes before being allowed to turn off. During the period the temperature could fall, and the heater could turn on.
I would expand the on/off temps for the heater, chiller and fan, and set the log interval to say 5 minutes so you can see the actual temperature fluctuations of the tank and you can see what is happening more easily.

Curt