Check how the pump is defeined and setup on the IntelliConnect.
The IntelliConnect manual says it can control the iChlor through the RS-485. See
https://www.pentair.com/content/dam...elliconnect/intelliconnect-manual-english.pdf
Page 4:
Wiring a Salt Chlorine Generator (SCG)
IMPORTANT!: When a salt chlorine generator is connected
to IntelliConnect, a single speed pump designated as "Filter
Pump" or IntelliFlo pump MUST be connected.
A salt chlorine generator should be wired to one side of the
RS-485 Terminal (Figure 5) according to the markings on
the control board.
When an IntelliChlor or iChlor SCG is wired to
IntelliConnect via an RS-485 cable, a power connection
to the load side of the pump relay is not required.
Digital
commands sent from the IntelliConnect to the SCG will not
allow chlorine production when there is low/no power to the
filter pump relay or when the IntelliFlo is not running.
Only wire the RS-485 cable's YELLOW and GREEN
conductors to the RS-485 Terminal. Cut off and terminate
unused conductors according to local and national electrical
codes.
Note: After IntelliConnect has operated in Service Mode
for 3 minutes, IntelliConnect will maintain chlorine output
adjustments made at the SCG when placed back into Auto
Mode.
Page 9:
IntelliChlor/iChlor generators, IntelliFlo pumps and heaters should receive power directly from the breaker (to receive constant power) and should not be wired through Relay 1 or Relay 2.