Hayward PoolBoss keeps tripping on an off with a "SER" message displayed

hhtat

New member
Mar 15, 2019
2
Austin, TX
Wondering if anyone knows troubling shooting steps for a Hayward PoolBoss. I found the installation manual but nothing about diagnostics. Basically when the filter timer comes on the system keeps turn on/off. When this happens the control panel reads "SER". AFAIK, there's only two sensors attached... a freeze sensor and a temperature sensor - my gut feeling is "SER" means one of them is tripping?
 

hhtat

New member
Mar 15, 2019
2
Austin, TX
Thank you. One thing I've discovered is that SER is printed whenever the control knobs are moved from the "auto" position. It's possible one of these knobs are failing.