Release notes - CPUs
8-zone CPU module (C225)
C225 3.73 - Sep 2025
Overheat protection (default off)
Automatically opens or closes zones when temperatures go outside safe limits.
Brivis Integration
Seamless integration with Brivis gas ducted heater using C325BV module.
Favourite Driven Set Point & Power Control
Store both set point and ON/OFF state in favourites.
Auto ON when activating any climate/open zone favourite; Auto OFF with a close all favourites.
Unit auto ON/OFF on Zone Change
New toggle to automatically turn on AC when zones switch from CLIMATE or OPEN.
VRF Mitsubishi Electric (ME) support
Integrate with ME VRF systems using a VRF host module (CVRFH) module.
Remote Firmware Upgrade
Implement the ability to upgrade firmware versions remotely without replacing physical hardware (C225 and COCBH only).
Bug Fixes & Refinements
Added configurable timer delay before zones revert to schedules after a Brivis event.
Expanded sensor source options (return air, master, or RF sensor).
C225 3.70 - May 2025
Applies VRF default settings during updates performed via PK5/PK4
C225 3.69 - Dec 2024
Added Mitsi Electric 4th fan speed
Fixed iZone/Midea/York AC comms status in Nova controller
Added support for Hisense
Introduced temperature control for the constant zone
Added VRF (Variable Refrigerant Flow) functionality
C225 3.66 - Jul 2024
Fix schedule over midnight
Fix return air reading in Nova when no temperature control is present
Change time to ‘auto turn off AC system’ from 60s to 3s
Fix Brivis 6-fan speed in auto mode
Add ‘add-on cooler’ option to the Brivis system
Added sleep timer count down
C225 3.65 - Jun 2024
Hot water system release (IRD-189)
Brivis system release (IRD-385)
Forward system reset message before resetting itself
Send zone 11 setpoint to COCB
Change structure of AC unit control firmware for the future VRF system
C225 3.64 - Mar 2024
Hot water system initial update
Add humidity to zones
Send damper positions to COCBH
Only slow down dampers when bypass is used
Added Haier AC unit control
C225 3.63 - Jul 2023
Fix AC unit connection bug (CTZ type boards)
Added Gree AC unit
Added Haier and MHI to slow damper strategy
C225 3.59 - Jan 2023
Fixed advanced constant control with fan auto disabled
6-zone CPU module (C150)
C150 3.69 - Dec 2024
Added Mitsi Electric 4th fan speed
Fixed iZone/Midea/York AC comms status in Nova controller
Fixed climate control mode issue
Added support for Hisense
Enabled temperature control for the constant zone
Fixed sensor status monitor to display signal strength for "RF Sensor"
Added support for the new Gree unit (G3)
Resolved an issue where the constant zone was not selecting the AC unit for temperature control
Updated sleep timer functionality to reset the remaining time to 0 when the sleep timer is stopped
C150 3.65 - Jun 2024
Hot water system release (IRD-189)
Brivis system release (IRD-385)
Forward system reset message before resetting itself
Send zone 11 setpoint to COCB
Change structure of AC unit control firmware for the future VRF system
6-zone CPU module + NET (C155)
C155 3.69 - Dec 2024
Added Mitsi Electric 4th fan speed
Fixed iZone/Midea/York AC comms status in Nova controller
Added support for Hisense
Enabled temperature control for the constant zone
Introduced VRF (Variable Refrigerant Flow) functionality
Fixed the sensor status monitor to display signal strength for "RF Sensor"
Added support for the new Gree unit (G3)
Resolved an issue with temperature control in the constant zone, where the AC unit selection was not working
Updated the sleep timer to reset the remaining time to 0 when stopped
C155 3.65 - Jun 2024
Hot water system release (IRD-189)
Brivis system release (IRD-385)
Forward system reset message before resetting itself
Send zone 11 setpoint to COCB
Change structure of AC unit control firmware for the future VRF system