Lennox iComfort S30 Installation And Setup Manual page 49

Table 1 Alert Codes and Troubleshooting
Applicable
Alert Priority
System
Code Condition
Component(s)
Heat pump,
furnace, and
40 Minor
iHarmony
Furnace, air
41 Moderate handler or outdoor
control
Thermostat,
furnace, air
handler, outdoor
105 Critical
unit, equipment
interface or
IHarmony
110 Critical Furnace
Critical alerts are displayed on the Home screen, in the Homeowner alert button, and in the Installer alert button.
Minor and moderate alerts are found only in the Installer alert button.
Actual Displayed Alert
Component or System Operational State and Troubleshooting Tip
Text
The heat pump could not increase the room temperature 0.5°F towards the
set point in 30 minutes.
In order to use the gas furnace as a primary heating source (not defrost
tempering) when the outdoor temperature is between the high and low bal­
ance points, the heat pump:
√ Must be used for a minimum of 30 minutes and the temperature in the zone
not increase by more than 0.5°F
√ Has not gone into defrost in the 30 minute period.
The default for HP Heating Lockout Time default is 120 minutes and will lock
the heat pump off when the outdoor temperature is above the high balance
point. Selectable range is 60 to 240 minutes.
√ Go to menu > settings > advance settings > dealer control center >
equipment > Smart Hub and located HP Heating Lockout Time to verify
the lockout time setting.
NOTE - HP Heating Lockout Time is only available in a zoning system.
If any single zone satisfies the aforementioned conditions, the heat pump is
stopped and the gas furnace is used to satisfy all heat calls for the next
HP Heating Lockout.
duration of the parameter heat pump lockout time. After the heat pump lock
out is expired, the heat pump is once again used as the primary heat
source.
√ Run system and verify that the heat pump cannot raise the room tempera­
ture 0.5F in 30 minutes on the zone or zones.
√ Check air flow to the zones or zones.
√ Check discharge air temperatures.
√ Check calibration of room thermostat.
√ Set the low balance point and high balance point as close together as possi­
ble. (This is 3°F difference – Example: Set high balance point at 40°F and
low balance point would set at 37°F). Go to menu > settings > advance
settings > dealer control center > equipment > Smart Hub and located
Low and High Balance Points.
√ When below the low balance point, the indoor unit will heat the home be­
tween the low and high balance point, the heat pump and furnace will heat
the home. When the outdoor temperature is above the high balance point,
the gas furnace is locked out and all the heat is provided by the heat pump.
Component control has This alert code will appear anytime a component control [Furnace, air han­
been replaced. dler, air conditioner or heat pump] is replaced in the system.
A system component has lost communication with the system. System com­
ponent (device) is unable to communicate.
√ This may indicate the existence of other active alert codes.
√ In most cases errors are related to electrical noise. Verify that high voltage
Communication Problem
power is separated from the low voltage communication wires.
√ Check for incorrectly wired or loose connections between system compo­
nents (devices).
√ Check for a high voltage source of noise close to the system.
The component AC line voltage is too low. This alert code may appear dur­
ing a brownout. Or when line voltage is below its designed operating value.
Low AC Line Voltage
√ Check and correct the power line voltage.
49
How to clear alert code
Clears when heat pump comes
out of HP Heating Lockout Time.
Must be cleared manually.
Automatically clears when the
system detects the issue no
longer exists.
Automatically clears when the
system detects the issue no
longer exists.