Lennox iHarmony 10C16 User Manual

25
Table 24. Alert Codes and Troubleshooting
Initial notication of critical alerts will pop up on the home screen and will be listed under notication menu. Minor and moderate alerts are found only under the notication menu.
Alert
Code
Priority
Condition
Actual
Displayed Alert
Text
Component or System Operational State and Troubleshooting Tip How Alert Code is Cleared
124 Critical
Active Subnet
Controller
Missing
The thermostat has lost communication with a system component for more than three minutes. System
component has lost communication with the thermostat. ing connections between components.
• Ohm wires.
• Cycle power.
• Any component that is miss-wired may cause a false component code to be shown on system component.
• Disconnect all wiring to other system components and check communication one at a time.
NOTE: When using a oat switch, use isolation relay to break common wire to outdoor unit. For testing purpos-
es, remove oat switch from the circuit
This alert code stops all associated system operations and waits for a heartbeat message from the system
component that is not communicating.
Automatically clears after
communication is re-established
with applicable system component
(device).
125 Critical
Control Hardware
Problem
There is a hardware problem on a system component control. There is a control hardware problem.
• Replace the control if the problem prevents operation and is persistent.
• Damper control module will remain in non-zone mode (all dampers open) for ve minutes after priority
condition no longer exist.
• Remove jumper if present on indoor unit between R and W2 if equipment interface module is in use.
• On the PureAir S control the jumper selector is missing.
Automatically clears ve minutes
after the issue no longer exists.
131 Critical
Corrupted
Control
Parameters
System component control parameters are corrupted.
• Replace the system component control if heating or cooling is not available.
• Go to menu > advance settings > view dealer control center > equipment and press reset all equipment.
This will allow the system to auto-detect any iComfort components attached.
Will automatically clear when system
component (device) passes memory
self-test or system component control
is replaced.
132 Critical
Failed Flash CRC
Check
System component control software is corrupted.
• Recycle power.
• If failure re-occurs, replace the system component control.
Manual system power reset is
required to recover from this alert
code.
250 Moderate
Primary Limit
Switch Open
The furnace primary limit switch is open. If limit switch is not closed within three minutes, the unit will go into a
60 minute soft lockout (Watchguard mode). Perform the following:
• Check for high gas pressure.
• Check for low supply air. Low supply air due to being plugged or restriction in system (example: dirty air lter
or blockage in duct work).
• Check for proper ring rate on furnace.
• Check for non-functioning zone dampers.
NOTE: Limit trips will place the iHarmony zoning system into non-zone mode.
NOTE: See ACC-14-01 for further details.
Automatically clears when a heat call
ends successfully.
NOTE: If this issue occurred on an
iHarmony zoning system, the eld
will need to manually activate the
zoning.
252 Moderate
Discharge Air
Temperature
High
A discharge air-temperature is high. Perform the following:
• Check temperature rise, air ow and input rate.
• Check for dirty air lter(s).
NOTE: See Service and Application Note ACC-14-01 for further details.
Automatically clears when a heat call
ends successfully.

Lennox iHarmony 10C16 Specifications

General

Brand	Lennox
Model	iHarmony 10C16
Category	Control Unit
Language	English