Software Revs 3,5,6,8,10, 12 Infinity /Evolution Troubleshooting (Rev. 2)
10-12-2006
16
Infinity / Evolution Zoning Troubleshooting
The Infinity and Evolution Zoning systems are unique, in that they prohibit a bypass damper from
being installed. This is a new technology that is possible due to the fact that only variable speed
blower motors are used in these systems. These motors allow control of airflow in every situation.
Most problems that will be encountered with this system will be airflow related. It is imperative that
the duct system be sized properly, and thought out in such a way that will accommodate the
customer’s requirements.
NOTE: Some structures are not suitable for zoning applications. Do not assume that this system
can be installed to FIX a ductwork related problem.
Troubleshooting Over Conditioning Zones
First check sensor locations and ensure they are not being influenced by air drafts behind the
wall. Make sure hole is plugged behind sensor or User Interface if the problem is in zone 1.
Next perform Damper/ Sensor check in Zoning Checkout screens to ensure dampers and
sensors are properly wired, to the damper control module.
If these are satisfactory, proceed to the steps below.
An important step in troubleshooting the Infinity / Evolution zoning system is to understand what
the system is being told to do, and what it is actually doing. Several features are available to
assist you in this task:
1. Check system status
Don’t assume a zone is not calling for heat or cooling because the set point matches the actual
temperature reading. The system controls in 16ths of a degree, but only displays in whole
numbers. There could be as much as 0.9 degree demand in a zone when the readings match.
This is enough demand to bring on high stage heat or cool.
Go into the service screens and check indoor unit status to determine current heat or cool stage.
2. Check Zoning Status
Proceed to zoning status to view damper positions. This is the best way to determine if the
system is calling for heat or cool into a zone. If a damper is open, and the system is running,
there is a probably a call for conditioning in that zone(unless it is opened slightly due to airflow
limit management or excess static pressure– see airflow limit description later in manual). If the
damper position is 0, and the zone is overconditioned, there may be an application problem.
3. Possible application issues causing over conditioned zone
If a zone is over conditioning and the damper position is 0, then you may have a damper
problem such as leakage issue, or conditioning from an andjacent zone may be carrying over
into the problem zone.
4. A zone may be overconditioned within limits due to Airflow Limit and Excess static pressure
issues. If a zone is set back more than 3 degrees from the most conditioned set point, and the
system needs to dump air to continue operating, that zone may be used as a dump zone. See
Airflow Limit and Excess Static Pressure
5. Other possible causes of over-conditioned zones
• Partially broken damper wire intermittently losing connection.
• Partially stuck damper
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