Integrated Control Diagnostic Codes (continued)
Code | Diagnostic Codes/Status of Equipment | Action Required to Clear and Recover |
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E 223 | Low pressure switch failed open − Refer to troubleshooting in installation | Check inches of water column pressure during operation |
| instruction. | of low pressure switch on heat call, measure inches of |
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| water column of operating pressure, inspect vent and |
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| combustion air inducer for correct operation and restric- |
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| tion. |
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E 224
Low pressure switch failed closed − Refer to troubleshooting in installation instruction.
Check low pressure switch for closed contacts, measure inches of water column of operating pressure, inspect vent and combustion air inducer for correct operation and re- striction.
E 225
High pressure switch failed open − Refer to troubleshooting in installation instruction.
Check inches of water column pressure of high pressure switch on heat call, measure inches of water column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.
E 226
High pressure switch failed closed − Refer to troubleshooting in installation instruction.
Check high pressure switch for closed contacts, measure inches of water column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.
E 227
Low pressure switch open during trial for ignition or run mode. Refer to trouble- shooting in installation instruction.
Check inches of water column pressure during operation of low pressure switch on heat call, measure inches of water column of operating pressure, inspect vent and combustion air inducer for correct operation and restric- tion.
E 228
Unable to perform successful pressure switch calibration.
Retry after 300 seconds. Error counter cleared when exit- ing lockout, unable to perform pressure switch calibration. Check vent system and pressure switch wiring connections.
E 240
Low flame current − Run mode − Refer to troubleshooting in installation instruction.
Check micro amperes of flame sensor, clean or replace sensor. Measure voltage of neutral to ground for good unit ground.
E 241 | Flame sensed out of sequence − Flame still present. | Shut off gas, check for gas valve leak. |
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E 250 | Limit switch circuit open − Refer to troubleshooting in installation instruction. | Check why limit is tripping, overfired, low air flow. |
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E 252 | Discharge air temperature too high (gas heat only). | Check temperature rise, air flow and input rate. |
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E 270 | Soft lockout − Exceeded maximum number of retries. No flame current sensed. | Check for gas flow, ignitor lighting burner, flame sensor |
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| current. |
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E 271
Soft lockout − Exceeded maximum number of retries. Last retry failed due to the pressure switch opening.
See E 223.
E 272
Soft lockout − Exceeded maximum number of recycles. Last recycle due to the pressure switch opening.
See E 223 and E 225.
E 273
Soft lockout − Exceeded maximum number of recycles. Last recycle due to flame failure.
See E 240.
E 274
Soft lockout − Exceeded maximum number of recycles. Last recycle failed due to the limit circuit opening or limit remained open longer than 3 minutes.
See E 250.
E 275
Soft lockout − Flame sensed out of sequence from code 241 fault. Flame signal is gone.
See E 241.
E 276 | Soft lockout − Exceeded maximum number of calibration retries. | See E 228. |
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E 290 | Ignitor circuit fault − Failed ignitor or triggering circuitry. | See E 207. |
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E 291 | Restricted air flow − Cubic feet per minute is lower than what is needed for | Check for dirty filter, unit air flow restriction, blower |
| minimum firing rate. | performance. |
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E 292 | Indoor blower motor unable to start − Seized bearings, stuck wheel, etc. | Indoor blower motor unable to start (seized |
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| bearing, stuck wheel, etc), replace motor or wheel if |
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| assembly does not operate or meet performance. |
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E 294
Combustion air inducer motor amp draw is too high.
Check combustion blower bearings, wiring , amperes, replace if it does not operate or meet performance.
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