66
Table 19. Alert Codes and Troubleshooting
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat
Alert
Code
Inverter
Flash
Code
Priority
Condition
Actual Displayed
Alert Text
Under dealer
control center >
Notifications
Component or System Operational State and Troubleshooting Tip
How to clear alert code
202
Service
Urgent
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
Service
Urgent
ID Invalid Size
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
Service
Urgent
GF Check Gas
Valve
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
Service
Urgent
GF Gas Valve
Relay Contact
Closed
The furnace gas valve relay contact is closed.
•
Check wiring on control and gas valve. The relay is located on the furnace control .
• If issue continues replace furnace control.
Automatically clears after the issue is
corrected.
206
Service Soon
GF Gas Valve
2nd Stage Relay
Fault
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.
207
Service
Urgent
GF HSI Sensed
Open
The furnace hot surface igniter is open.
• Measure the resistance of hot surface igniter.
•
Replace the igniter if it is not within the specified range found in furnace installation instruction.
Automatically clears after the issue is
corrected.
223
Service Soon
GF Low
Pressure Switch
Open
The furnace low pressure switch is open.
• Check pressure (inches w.c.) of the low pressure switch closing during a heat call.
• Measure operating pressure (inches w.c.).
•
Inspect vent for blockages and combustion air inducer for correct operation and restriction.
• Check for blocked cold end heater box or condensate drain or drain strainers at outlet of cold
end heater box.
• Check for cracked hoses.
•
Check levelness of unit.
NOTE:
Check Service Manual and Service and Application Note H-13-07 “Condensing Furnace
Pressure Switch Troubleshooting” for additional information.
Automatically clears after the issue is
corrected.
