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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
270
Critical
Furnace
WatchGuard -
Flame Failure on
Ignite
The furnace is in Watchguard mode. The furnace igniter cannot turn on the flame. This is a five strike condition during a single
demand.
•
Check for proper gas flow.
• Ensure that igniter is lighting burner.
•
Check flame sensor current.
•
Check for dirty filters.
• Check for blocked cold end heater box or condensate drain and cracked hoses.
Automatically clears on successful ignition.
271
Critical
Furnace
WatchGuard - Low
Press Switch Open
The furnace is in watchguard mode. The furnace low pressure switch is open. This is a five strike condition during a single
demand.
• Check pressure (inches w.c.) of low pressure switch closing during a heat call.
• Measure operating pressure (inches w.c.).
• Check for blocked cold end heater box (CEHB), or condensate drain or drain strainers at outlet of CEHB and cracked hoses.
• 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 on successful ignition.
272
Critical
Furnace
WatchGuard - Lo
Press Switch Open
Run Mode
The furnace low pressure switch is open during run mode. The system will go into Watchguard mode.
• Check operation of low pressure switch to see if it is stuck open 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 (CEHB), or condensate drain or drain strainers at outlet of CEHB and cracked hoses.
• 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 on successful ignition.
