Page 62
Integrated Control Diagnostic Codes (continued)
Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover
E 223 Low pressure switch failed open − Refer to troubleshooting 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 restriction.
E 224 Low pressure switch failed closed − Refer to troubleshooting in installation
instruction.
Check low pressure switch for closed contacts, measure inch-
es of water column of operating pressure, inspect vent and
combustion air inducer for correct operation and restriction.
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 oper-
ating 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 restric-
tion.
E 227 Low pressure switch open during trial for ignition or run mode. Refer to
troubleshooting 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 restriction.
E 228 Unable to perform successful pressure switch calibration. Retry after 300 seconds. Error counter cleared when exiting
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 sen-
sor. 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.
E 250 Limit switch circuit open − Refer to troubleshooting in installation
instruction.
Check why limit is tripping, overfired, low air flow.
E 252 Discharge air temperature too high (gas heat only). Check temperature rise, air flow and input rate.
E 270 Soft lockout − Exceeded maximum number of retries. No flame
current sensed.
Check for gas flow, ignitor lighting burner, flame sensor
current.
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.
E 290 Ignitor circuit fault − Failed ignitor or triggering circuitry. See E 207.
E 291 Restricted air flow − Cubic feet per minute is lower than what is
needed for minimum firing rate.
Check for dirty filter, unit air flow restriction, blower
performance.
E 292 Indoor blower motor unable to start − Seized bearings, stuck wheel,
etc.
Indoor blower motor unable to start (seized bearing,
stuck wheel, etc), replace motor or wheel if assembly
does not operate or meet performance.
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.
To Next Page
Loading...
Need help?
General
