ERROR: NO COMMS TO AC

If the controller displays the message “No Comms to AC”, this indicates that no communication is occurring between the indoor unit and the iZone system

• Check your wiring from the indoor unit and iZone is correct, find the correct wiring diagram here: C325# Wiring Diagrams

1. You will need a flathead screwdriver to separate the C225 & C325#

2. On the topside, put the flathead screwdriver under the tab and begin to slowly lever the modules apart

   1. Once apart, inspect the pins for any damage, bent, broken, or pushed in, if the male or female connectors have been damaged then you will need to order a replacement

3. If no damage has occurred, then reconnect the two modules

4. Perform a hard reset for 15mins for both the Unit and iZone

Check the pin connections between the C225 (CPU) and the C325# module - New Style

1. You will need a Philips head screwdriver to separate the C225 & C325#

2. On the topside, there is a screw holding the modules together

   1. Loosen the screw until it stops biting onto the C225

   2. You should now be able to easily pull away the C325# from the C225

   3. Once apart, inspect the pins for any damage, bent, broken, pushed in, if the male or female connectors have been damaged then you will need to order a replacement

3. If no damage has occurred, then reconnect the two modules

4. Perform a hard reset for 15mins for both the Unit and iZone