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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.
Actual
Alert
Priority
Displayed Alert
Code
Condition
Text
Corrupted
131
Critical
Control
Parameters
Failed Flash CRC
132
Critical
Check
Primary Limit
250
Moderate
Switch Open
Discharge Air
310
Moderate
Temp Sensor
Problem
Moderate /
Low Damper
530
24VAC Voltage
Critical
Zoning Pressure
532
Moderate
Switch Opened
(High Pressure)
Zone 1
Moderate/
542
Temperature
Critical
Sensor Problem
Zone 2
Moderate/
543
Temperature
Critical
Sensor Problem
Zone 3
Moderate/
544
Temperature
Critical
Sensor Problem
Zone 4
Moderate/
545
Temperature
Critical
Sensor Problem
Table 13. Alert Codes and Troubleshooting
Component or System Operational State and Troubleshooting Tip
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.
System component control software is corrupted.
•
Recycle power.
•
If failure re-occurs, replace the system component control.
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).
•
Check for high gas pressure.
•
Low supply air due to being plugged or restriction in system (example:
dirty air filter or blockage in duct work).
•
Limit trips will place the iHarmony zoning system into non-zone mode.
•
Check for proper firing rate on furnace.
•
Check for non-functioning zone dampers.
NOTE:
Refer to S&A Note ACC-14-01 - iHarmony and SLP98 - Insufficient
Zone Heating and Alarm Code 250 Issues for corrective actions.
There is a discharge air temperature sensor issue.
•
Compare discharge temperature sensor (DATS) resistance to temperature
/ resistance charts in system component installation instruction.
•
Replace discharge air sensor if necessary.
NOTE:
Confirm there is no short or open circuits in the iComfort thermostat
connections to any of the other components in the communication
system.
NOTE:
Issues with a DATS connected to a damper control module or equip-
ment interface model will not generate an alert code.
Low Damper 24VAC Voltage
•
Damper supply voltage is less than 18VAC.
•
Maintain non-zone mode for five minutes after alarm clears.
Zoning Pressure Switch Opened (high pressure)
•
Compressor pressure is above the specified limit.
•
Compressor is turned off.
•
Zoning will be restored once the high pressure switch closes.
•
Zone temperature sensor reading out of range.
•
Open or short zone temperature sensor detected for more than five
second.
•
Damper control module will operate in non-zone mode (all dampers open)
– moderate condition.
•
If after 10 minutes the condition does not change, the priority code is
change to critical. System will continue to operate in non-zone mode.
15
How to clear
alert code
Will automatically
clear when system
component (device)
passes memory
self-test or system
component control is
replaced.
Manual system power
reset is required to
recover from this alert
code.
Automatically clears
when a heat call ends
successfully.
NOTE: If this issue
occurred on an
iHarmony zoning
system, the field will
need to manually
activate the zoning.
Automatically clears
30 seconds after
condition is detected
as recovered or after
system restart.
Automatically clears
when the condition no
longer exists.
Automatically clears
after compressor
pressure is within
limits.
Automatically clears
30 seconds after
condition no longer
exist.
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