Description of Fault
A CATALYST Heating Failure Alarm is generated when the CATALYST commands the unit into full heating and a supply temperature of 85°F or more is not produced after 40 min.
A CATALYST Heating Failure Alarm will automatically reset when the unit is commanded into full heating and supply temperature rises above 90°F.
Possible Causes
A CATALYST Heating Fail is typically caused by:
- Failed heating components.
- Unitary safeties.
- Unit control board restricting heating command
Troubleshooting
From the eIQ Platform
- On the eIQ Platform, navigate to the Settings page of the unit and locate the Soft Switch.
- Set the Service Switch to the OFF option.
- Navigate to the Status page and verify the unit is not outputting any cooling commands.
- Go back to the Settings page and set the Soft Switch to the Heat 1 or 2 Fan 100% (based on the number of heating stages the unit has) option.
- Navigate to the Status page of unit and verify that full heating is commanded to be on.
- If the supply temperature rises above 85°F, continue to monitor the unit for 10-15 minutes to verify that the heating continues to run and does not trip on any unitary safeties.
- If the supply temperature does not rise above 85°F, a technician will need to investigate the equipment to resolve the issue.
- Access the CATALYST Service Switch typically located in the controls section of the Unit.
- Set the CATALYST Service Switch to the Unit OFF position and verify the fan and heating elements are disengaged.
- Set the CATALYST Service Switch to the Heat 1 or 2 Fan 100% position and verify the heating command engages.
- If the heat fails to engage:
- Verify that you have 24 volts AC on the heat command from the CATLYST Green 8 conductor that is landed on the unit’s low voltage terminal.
- If there is voltage on the heat command wires from the CATALYST green 8 conductor, then the heating is not functioning due to a mechanical deficiency with the unit. Continue standard mechanical troubleshooting to resolve the issue.
- If there is no voltage on the heat command wires from the CATALYST green 8 conductor, then contact Transformative Wave for additional troubleshooting support.