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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
347
Critical
Indoor unit
or equipment
interface
module
Relay Y1 Failure
Sequence of Operation
: Communicating room thermostat send a
Y1
or
Y2
cooling or heat pump demand to the indoor control
asking it to send a
Y1
or
Y2
output to the outdoor unit, right? The indoor control then looks to see if it sees 24 volts between the
Y1
and common or
Y2
and common on its terminals. If it does not see 24 volts, it sets the code 347.
The
Y1
relay on the applicable system component has failed. Either the pilot relay contacts did not close or the relay coil did not
energize.
• System operation will stop.
• Possible
Y1
relay / stage 1 failure.
• Pilot relay contacts did not close or the relay coil did not energize;
NOTE:
There is no input back to the applicable system component control.
Automatically clears after reset and
Y1
input sensed.
348
Critical
Indoor unit
Relay Y2 Failure
Sequence of Operation
: Communicating room thermostat send a
Y1
or
Y2
cooling or heat pump demand to the indoor control
asking it to send a
Y1
or
Y2
output to the outdoor unit, right? The indoor control then looks to see if it sees 24 volts between the
Y1
and common or
Y2
and common on its terminals. If it does not see 24 volts, it sets the Alert Code 348.
The
Y2
relay on the applicable system component has failed. Either the pilot relay contacts did not close or the relay coil did not
energize.
• Possible
Y2
relay / stage 2 failure.
• Furnace pilot relay contacts did not close or the relay coil did not energize
• No input back to furnace or air handler control.
Automatically clears when the system detects that the issue no longer exists.
349
Critical
Furnace
IFC Error Check
Jumper O to R
The
O
to
R
link on the furnace needs to be restored.
•
Configuration link
R
to
O
needs to be restored.
• Repair cut link by hard-wiring the
R
to
O
terminals on the terminal strip.
• Only applicable in non-communicating mode.
•
Possible cause brown out. Might result in low voltage to which would generate alert code.
Automatically clears when the system detects that the issue no longer exists.
350
Critical
Air handler
Electric Heat Not
Configured
The air handler’s electric heat is not configured or incorrectly configured.
•
Heat call with no configured or incorrectly configured electric heat.
•
Check for proper configuring under Configuring Electric Heat Stages in the air handler installation instructions.
NOTE:
smart hub MUST be removed from the system before configuring electric heat.
Automatically clears after electrical heat detection is successful.
