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Table 19. Alert Codes and Troubleshooting
Initial notification of critical alerts will pop-up on the home screen and will be listed under notification menu. Minor and moderate alerts are found only under the notification menu. Moderate alerts
are not e-mailed to Homeowners. Dealers will get an email and code can be seen on thermostat under the installer notification section.
NOTE:
Anytime the word
DEVICE
or
DEVICE2
is used in this table, it will be replaced on all alert code notification screens with the actual offending device name, for example, thermostat, heat
pump, etc.).
Alert
Code
Inverter
Flash
Code
Priority
Condition
Applicable
Component
Actual Displayed
Alert Text
Component or System Operational State and Troubleshooting Tip
200
Critical
Furnace
Rollout Limit
Switch Open
The furnace roll out limit switch is open. Correct the cause of roll out trip.
• Reset roll out switch.
• Test the furnace operation.
•
Check for blocked or obstructed vent pipe (Intake and/or Exhaust).
•
Check for flame stability, if flame is unstable, look for cause.
• Automatically clears after the furnace roll out switch is closed.
201
Critical
Furnace or air
handler
Indoor Blower
Motor Problem
Lost communication with indoor blower motor.
• Possible causes include power outage, brown-out, motor not powered, loose wiring, condensation on system component
control without cover on breaker.
• Problem may be on system component control or motor side.
• Automatically clears after communication is restored.
202
Critical
Furnace or air
handler
ID Blower Motor &
Unit Size Mismatch
The unit size code for the indoor unit and the size of blower motor do not match. Incorrect appliance unit size code selected.
•
Remove the thermostat from the system while applying power and reprogramming.
•
Check for proper configuring under unit size codes for furnace/air handler in configuration guide or in installation instructions.
• Automatically clears after the correct match is detected following a reset.
203
Critical
Furnace or air
handler
Invalid Unit Code
The unit size code for the indoor unit has not been selected or set incorrectly.
•
Verify that the correct unit size code is configured. Unit size codes for furnace and air handler are listed in the system
component configuration guide or installation instruction.
•
Remove the thermostat from the system while applying power and set the unit size code per instructions provided in the
indoor unit installation instruction.
• Automatically clears after the correct match is detected following a reset.
204
Critical
Furnace
Gas Valve Problem
There is an issue with the furnace gas valve.
•
Check gas valve operation and wiring.
•
Check for voltage to the gas valve.
• Automatically clears after the issue is corrected.
205
Critical
Furnace
Gas Valve relay
Contact Closed
•
The furnace gas valve relay contact is closed. Verify wiring on control and gas valve or in good order, not missing or
damage..
• Automatically clears after the issue is corrected.
206
Critical
Furnace
Gas Valve 2nd
Stage Relay
Failure
The furnace gas valve second-stage relay is faulty.
•
Furnace will operate on first-stage for the remainder of the heating demand
• If unable to operate second-stage, replace furnace control.
• Automatically clears after the issue is corrected.
