CAC_ : Communication Error U_
To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.
Reconnect or replace CAN cable connecting AMZ and ADM. If CAN connection good, check 24V power supply wiring in side the heat box. Make sure AC power to pump is turned off before checking power supply. Yellow LED on AMZ 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 AMZ. Yellow LED on AMZ board should be flashing.