Reconnect or replace CAN cable connecting driver and ADM. If CAN connection good, check 24V power supply wiring in driver. Make sure AC power to pump is turned off before checking power supply. Yellow LED on driver connector board should be flashing.
CAN cables carry 24 V DC power and communication between modules. A cross threaded CAN cable connector may cause problems with communication and/or power to modules. Carefully check for cross threaded CAN connections on the ADM and driver. Yellow LED on driver connector board should be flashing.