507343-01
Page 58
Table 10. Alert Codes and Troubleshooting
Critical alerts are displayed on the Home screen, in the Home
owner alert button, and in the Installer alert button. Minor and
moderate alerts are found only in the Installer alert button.
Alert
Code
PRIORITY
CONDITION
APPLICABLE
SYSTEM
COMPONENTS
ALERT TEXT
COMPONENT OR SYSTEM OPERA
TIONAL STATE AND TROU
BLESHOOTING TIP
HOW TO CLEAR
ALERT CODE
412 Moderate
Outdoor unit
The unit high-pressure is above
the required limit.
System is shut down
Unit high pressure is above the
upper limit.
The high pressure switch for
HFC410A will open at 590PSIG
and close at 418PSIG.
Confirm that the system is proper
ly charged with refrigerant.
Check outdoor fan motor, TXV,
indoor unit blower motor, stuck re
versing valve and possible
clogged refrigerant filter.
Confirm that the outdoor unit is
clean.
Automatically clears
after the high pressure
switch closes or a
power reset
413 Critical
Outdoor unit
The high-pressure switch has
opened five times during a sin
gle demand.
Thermostat will shut down the
outdoor unit.
Open high pressure switch error
count reached five strikes.
Check system charge using ap
proach and sub cooling tempera
tures.
Check outdoor fan operation.
Check for dirt or debris blocking
air flow to outdoor unit.
Reset by putting outdoor unit con
trol in test mode or resetting low
voltage power.
Automatically clears
when the system de
tects that the issue no
longer exists.
414 Critical
Outdoor unit
The discharge line temperature
is higher than the recommend
ed upper limit of 279ºF.
Discharge line temperature is
greater than 279ºF.
Make sure coil is clean and air
flow unobstructed in and out of
condenser.
Check system operating pres
sures and compare to unit charg
ing charts in installation manual.
Automatically clears
after discharge tem
perature is less than
225ºF.
415 Critical
Outdoor unit
The discharge line temperature
has been consistently higher
than the recommended upper
limit of 279ºF.
Discharge line high temperature
error count reached five strikes
during a single demand.
Make sure coil is clean and air
flow unobstructed in and out of
condenser.
Check system charge using ap
proach and sub cooling tempera
tures.
Reset by putting outdoor control
in test mode or resetting low volt
age power.
Automatically clears
when the system de
tects that the issue no
longer exists.
416 Critical
Outdoor unit
The outdoor coil sensor is ei
ther open, short-circuited or the
temperature is out of sensor
range.
Outdoor unit control will not per
form demand or time / tempera
ture defrost operation. (System
will still heat or cool.)
Sensor being detected open or
shorted or temperature is out of
sensor range.
Automatically clears
when outdoor unit con
trol detects proper
sensor readings.
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