Error Code 15.4 - Frequently Asked Questions (FAQ)
Q: What is error code 15.4? A: Error code 15.4 is an error message that may appear on your HVAC system. It can refer to one of three possible issues: an incompatible indoor unit connected to the controller, an indoor unit data acquisition error, or a primary unit/secondary unit setting error.
Q: What does an incompatible indoor unit mean? A: An incompatible indoor unit means that the unit connected to the controller is not compatible with the HVAC system. This can happen if the indoor unit is not designed to work with the specific controller.
Q: What is an indoor unit data acquisition error? A: An indoor unit data acquisition error is a failure to collect or process data from the indoor unit. This can occur if there is a communication problem between the controller and the indoor unit or if the data acquisition process is interrupted.
Q: What is a primary unit/secondary unit setting error? A: A primary unit/secondary unit setting error is a configuration issue that can occur if the primary and secondary units are not set up correctly. This can lead to communication problems between the units and can cause errors in the HVAC system.
