Lennox iComfort SL18XC-01 Installer Setup Manual page 28

Table 1. Alert Codes and Troubleshooting
Alert
Priority Alert Text
Code
(Air Handler) The air­handler's electric heat
350 Critical
is not configured.
(Air Handler) There is a problem with the
air­handler's 1st stage electric heat. Either
351 Critical the pilot relay contacts did not close, or the
relay coil in the electric heat section did not
energize.
(Air Handler) There is a problem with the
air­handler's 2nd stage electric heat. Either
the pilot relay contacts did not close, or the
352 Critical
relay coil in the electric heat section did not
energize. The air­handler will operate on 1st
stage electric heat until the issue is resolved.
(Air Handler) There is a problem with the
air­handler's 3rd stage electric heat. Either
the pilot relay contacts did not close, or the
353 Critical relay coil in the electric heat section did not
energize. The air­handler will operate on 1st
stage electric heat until the issue is re­
solved.`
(Air Handler) There is a problem with the
air­handler's 4th stage electric heat. Either
the pilot relay contacts did not close, or the
354 Critical
relay coil in the electric heat section did not
energize. The air­handler will operate on 1st
stage electric heat until the issue is resolved.
(Air Handler) There is a problem with the
air­handler's 5th stage electric heat. Either
the pilot relay contacts did not close, or the
355 Critical
relay coil in the electric heat section did not
energize. The air­handler will operate on 1st
stage electric heat until the issue is resolved.
507341-02
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.
Steps to clear
Heat call with no configured or incorrectly configured electric heat. Check for proper con­
figuring under Configuring Electric Heat Stages in the air handler installation instructions.
Cleared after electrical heat detection is successful.
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.
Heat section / Stage 2 failed (Same as Code 351).
Heat section / Stage 3 failed (Same as Code 351).
Heat section / Stage 4 failed (Same as Code 351).
Heat section / Stage 5 failed (Same as Code 351).
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