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Table 12. LED Error Codes Displayed By The S9240F2051 IFC. (Continued)
Error/Fault Condition
Valve relay contact shorted
HSI sensed open
Inducer/pressure switch calibration failure
Retry > maximum – last one due to no flame
Retry > maximum – last one due to low
pressure switch open
Recycle > maximum – last one due to low
pressure switch open
Recycle > maximum – last one due to flame
lost in run mode
Limit switch open > 3 minutes
Flame out of sequence and flame is gone
Retry > maximum; Failed to calibrate
Failed ignitor or trigger circuit
Available CFM below minimum firing rate
Circulator unable to start
Inducer over current
Rollout open or previously opened
Furnace size select missing or mis-match with
installed circulator motor (BTU reading
mismatch)
Invalid Unit Code (Appliance Capacity/Size)
a
In non-communicating mode an open or no temperature sensor is not considered as an error. In communicating mode, temper-
ature sensor errors (open, short, or out of range) are reported only if the temperature sensor is sensed as installed during the
configuration (device commissioning).
b
Recycle furnace power and perform operational check. If error repeats, there may be a permanent failure on the control board.
Error/Fault Condition
LSOM: Compressor long run times:
A/C only – over 18 hours
LSOM: Compressor short-cycling:
running less than 4 minutes
LSOM: System pressure trip
LSOM: Compressor rotor locked
LSOM: Compressor open circuit
LSOM: Compressor open start circuit
LSOM: Compressor open run circuit
LSOM: Compressor contactor is welded
LSOM: Compressor low voltage
a
LSOM = Lennox System Operating Monitor
Code
205 Soft Lockout after fault recovers and flame is gone.
207 Soft Lockout. Error counter cleared when exiting lockout.
228 Retry after 5 minutes. If failed allowed times, go to Soft
270 Retry. If failed allowed times, go to Soft Lockout. Error
271 Retry. If failed allowed times, go to Soft Lockout. Error
272 Retry. If failed allowed times, go to Soft Lockout. Error
273 Retry. If failed allowed times, go to Soft Lockout. Error
274 Soft Lockout. Error counter cleared when exiting lockout.
275 Soft Lockout. Error counter cleared when exiting lockout.
276 Soft Lockout. Error counter cleared when exiting lockout.
290 Soft Lockout. Error counter cleared when exiting lockout.
291 Soft Lockout. Error counter cleared when exiting lockout.
292 Soft Lockout. Error counter cleared when exiting lockout.
294 Soft Lockout. Send command to reset-motor. Error counter
200 Wait for rollout switch to close, then enter Hard Lockout. All
202 Hard Lockout. All error counters cleared after reset.
203 Unit defaults to 90 (90kBTU) if 1/2HP motor detected or 135
a
Table 13. LSOM
LED Error Codes Displayed By The S9240F2051 IFC.
Code
401
403
402
404
405
406
407
408
409
S9240F2051 MODULATING INTEGRATED FURNACE CONTROL
IFC Error Handling
(in addition to displaying error code)
Lockout. Error counter cleared when exiting lockout.
counter cleared when exiting lockout.
counter cleared when exiting lockout.
counter cleared when exiting lockout.
counter cleared when exiting lockout.
cleared when exiting lockout.
error counters cleared after reset.
(135kBTU) if 1HP motor detected.
IFC Error Handling
(in addition to displaying error code)
29
None
None
Result
Soft
Lockout
Hard
Lockout
Result
Warning
Only
Wait For
Recovery
69-2807—01
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