Hayward ProLogic Troubleshooting Manual page 26

CSM stands for (Chemistry Sensing Module), this error appears when Sense &
Dispense is enabled, but the Chemistry Sensing Module is not found.
Verify HL-CHEM is installed
Step 3A
Verify whether or not a HL-CHEM (sensing module and
enclosure) is installed. IF not installed, go to step 3B to
disable this feature. IF a sensing module is installed,
proceed to step 3C.
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3. CSM Comm Error
HL-CHEM
CSM =
Chemical
Sensing
Module
Disable sensing system
Step 3B
1
2
3
Press 'Menu' button until, 'Configuration Menu'
appears. Press & hold the (<) & (>) buttons until config.
Is unlocked. Press (>) until 'Chemistry Wizard' appears,
press (+) to enter. Finally, press (+) again to disable.