Hayward ProLogic - Troubleshooting: CSM Comm Error

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CSM Comm
Error
Disable
Chemistry
Sensing
Wire is
damaged?
YES
Test Comm port
power
3. CSM Comm Error
Is a chemistry
sensing module
installed?
Verify connections
& inspect CSM
wire for damage
Replace CSM
Module (GLX-
SD-ELEC-MOD)
5-10VDC
between pins
1 & 3?
Replace main
board
(see pg. 17)
YES
NO
Problem
solved
YES
NO
NO
Replace CSM
Module (GLX-
SD-ELEC-MOD)