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icomfort Wi-Fit 7−Day Programmable Communicating Thermostat
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Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Table 5. Alert Codes and Troubleshooting
Alert
Code
Steps to clearAlert TextPriority
345 Critical (Air Handler) The O" relay on the air−handler
has failed. Either the pilot relay contacts did not
close or the relay coil did not energize.
O relay / Stage 1 failed. Pilot relay contacts did not close or the relay coil did not energize. Replace
control. Cleared after the fault recovered following reset.
346 Critical (Air Handler) The heat pump jumper was not
removed on the air−handler control board.
Configuration link(s) not removed on control. Cut O−R. Applicable with non communicating outdoor
unit with communicating indoor system.
347 Critical (Furnace / Air Handler) The Y1" relay on the
(furnace or air−handler) has failed. Either the
pilot relay contacts did not close or the relay
coil did not energize.
Operation stopped. Y1 relay / Stage 1 failed. (Pilot relay contacts did not close or
the relay coil did not energize; no input back to IFC chip). Critical Alert. Cleared after reset and Y1
input sensed.
348 Critical (Furnace / Air Handler) The Y2" relay on the
(furnace or air−handler) has failed. Either the
pilot relay contacts did not close or the relay
coil did not energize.
Y2 relay / Stage 2 failed. (Pilot relay contacts did not close or the relay coil did not energize; no input
back to IFC chip). Critical Alert. Cleared after reset and Y1 input sensed.
349 Critical (Furnace) The O" to R" jumper on the furnace
needs to be restored.
Configuration link R to O needs to be restored. Replace link or hard−wire. Applicable in non commu-
nicating mode. Critical Alert.
350 Critical (Air Handler) The air−handler’s electric heat is
not configured.
Heat call with no configured or mis−configured electric heat. Check for proper configuring under
Configuring Electric Heat Stages in the air handler installation instructions. Cleared after electrical
heat detection is successful.
351 Critical (Air Handler) There is a problem with the air−
handler’s 1st stage electric heat. Either the pilot
relay contacts did not close, or the relay coil in
the electric heat section did not energize.
Heat section / Stage 1 failed. (Pilot relay contacts did not close, or the relay coil in the electric heat
section did not energize.) Air handler will operate on 1st stage for reminder of the heat call. Will clear
after fault recovered.
352 Critical (Air Handler) There is a problem with the air−
handler’s 2nd stage electric heat. Either the pi-
lot relay contacts did not close, or the relay coil
in the electric heat section did not energize. The
air−handler will operate on 1st stage electric
heat until the issue is resolved.
Heat section / Stage 2 failed (Same as Code 351).
353 Critical (Air Handler) There is a problem with the air−
handler’s 3rd stage electric heat. Either the pilot
relay contacts did not close, or the relay coil in
the electric heat section did not energize. The
air−handler will operate on 1st stage electric
heat until the issue is resolved.
Heat section / Stage 3 failed (Same as Code 351).
table continued on next page