Published : 2022-10-21 I have an XSEL 50 chlorinator and I have the message Er apparently it comes from the - Categories : Questions about RedOX probes Your questions about pH and Redox probes for swimming pools ph-redox-pool.com bot: Question EN May 10, 2022, 6:53 pm . If you have any questions, please let us know. May 10, 2022, 6:53 pm Hello, May 10, 2022, 6:53 pm I have an XSEL 50 chlorinator and I have the message Er apparently it comes from the probe © 2022 ph-redox-pool.com - All rights reserved