13
•
Table 6.
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
Priority
Condition
Actual Displayed
Alert Text
Under dealer
control center >
Notifications
Component or System Operational State
and Troubleshooting Tip
How to clear alert code
105
Service
Urgent
Communication
Problem
One of the system components has lost communication with
the system. The system component (device) is unable to
communicate.
•
S30 - Access dealer control center, select notifications icon,
review alert code details to determine which device or unit has
the communication problem. Review both active and cleared
alerts.
•
Wi-Fi – Press and hold the Lennox logo on the bottom right of
stat for 5 seconds to access the dealer control center. Follow the
prompts to access the dealer / installer screen and select the
“Alerts” tab. Review alert code details to determine which device
or unit has the communication problem. Review both active and
cleared alerts.
•
Zoning - Remove wire from smart hub to iHarmony control and
just have wiring from furnace.
Troubleshooting:
• Check each control for additional codes
• In most cases issues are related to electrical noise. Verify that high
voltage power is separated from the low voltage communication
wires.
• Check for proper grounding on line voltage and low voltage
wiring, transformer and equipment.
• Check for incorrectly wired or loose or spliced connections
between system components (devices or units).
•
Make sure all unused wires are tied together and taken back
to the C terminal on the indoor control board as shown in the
installation and setup guide.
•
Disconnect all wiring to other system components (except
thermostat to indoor unit) and reconnect one device at a time and
recommission system each time a device is reconnected until the
issue is located.
•
Zoning: If zoning is installed and is wired directly from smart hub
to iHarmony control then disconnect that wiring. Run control
wiring from the iHarmony control directly to the indoor unit control.
Wiring diagrams are provided in the iHarmony Installation and
Setup Guide.
•
Float Switch: When using a float switch, use isolation relay to
break common wire to outdoor unit. For testing purposes, remove
float switch from the circuit.
•
Firmware and Accessories: Make sure that smart hub has
correct firmware version for added accessory. (Example: Pure
Air S and/or Apple Home Kit must have software version 3.4 or
higher before it will connect to system properly. (If software is not
updated in system it will cause system operation issues).
• Inductive voltage from surrounding sources. Check each wire in
AC mode to C on circuit board.
>
Good voltage is .03-.3VAC inductive voltage is not an issue.
> Acceptable can be up to .7VAC with moderate success.
>
Some units have worked with up to 1.2VAC with occasional
success.
>
Voltage over 1.2VAC needs to be addressed.
Automatically clears when the
system detects the issue no longer
exists.
