Lennox iComfort S30 Installation And Setup Manual page 37

Table 1. Alert Codes and Troubleshooting
Applicable
Alert Priority
System
Code Condition
Components
291 Critical Furnace
Furnace or air
292 Critical
handler
294 Critical Furnace
295 Minor Furnace
Furnace, air
handler equipment
interface module or
310 Critical
damper control
module
311 Minor Furnace
Furnace or air
312 Minor
handler
Critical alerts are displayed on the Home screen, in the Homeowner alert button, and in the Installer alert button. Minor and
moderate alerts are found only in the Installer alert button.
Alert Text Component or System Operational State and Troubleshooting Tip
" The system will go into WatchGuard mode.
The heating airflow is be­
" Check for dirty air filter(s) and other air flow restrictions.
low the minimum required
level.
" Check blower performance.
" The system will go into WatchGuard mode.
" Indoor blower motor unable to start.
The indoor unit blower
" This could be due to seized bearing, stuck wheel, and obstructions.
motor will not start.
" Replace motor, motor module or wheel if assembly does not operate or meet perfor­
mance standards.
" The system will go into WatchGuard mode.
" Check combustion blower bearings, wiring and amps.
There is over current in
the furnace inducer motor.
" Replace furnace inducer motor if it does not operate or does not meet performance
standards.
" Indoor blower motor over temperature (motor tripped on internal protector).
" Check motor bearings and amps.
The indoor blower motor
is overheating. " Replace indoor blower motor if necessary.
" Check for high duct static.
" Compare outdoor sensor resistance to temperature / resistance charts in system
There is a problem with
component installation instruction.
system component's dis­
" Replace discharge air sensor if necessary.
charge air sensor.
" Damper control module will operate in non-zone mode (all dampers open).
" This is a Warning Only alert code.
" Furnace blower in cutback mode due to restricted airflow.
The heat firing rate has
" Reduce firing rate every 60 seconds to match available CFM.
been reduced to match
available airflow (cutback " Check air filter and duct system.
mode).
" To clear, replace air filter if needed or repair or add additional ducting.
" Two-stage controls will reduce firing rate to first stage.
" This is a Warning Only alert code.
" Possible restricted airflow - Indoor blower is running at a reduced CFM (Cutback
Mode).
The indoor blower cannot
" The variable speed motor has pre-set speed and torque limiters to protect the motor
provide the requested
CFM due to high static from damage caused by operating outside of design parameters (0 to 0.8" e.g. total
pressure.
external static pressure).
" Check air filter and duct system.
" To clear, replace air filter if needed or repair or add additional ducting.
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How to clear alert code
Automatically clears when a heat
call ends successfully.
Automatically clears after the in­
door blower motor starts success­
fully.
Automatically clears after inducer
motor current is sensed to be in-
range after the ignition following
either WatchGuard mode or unit
reset.
Automatically clears after blower
demand is satisfied.
Automatically clears 30 seconds
after fault is detected as recov­
ered.
Automatically clears when a heat
call finishes successfully.
Automatically clears after the cur­
rent service demand is satisfied.