Haier GE NF80XV Series Service Manual page 14

Code Diagnostic Codes / Status of Equipment
E227 Low pressure switch open during trial for ignition
or run mode. Refer to troubleshooting
E228 Combustion air inducer calibration failure
E229 Ignition on high fire
E240 Low flame current - Run mode- Refer to
troubleshooting
E241 Flame sensed out of sequence-Flame still
present.
E250 Limit switch circuit open - Refer to
troubleshooting.
E252 Discharge air temperature too high (gas heat
only).
E270 Soft lockout - Exceeded maximum number of
retries. No flame current sensed.
E271 Soft lockout - Exceeded maximum number of
retries. Last retry failed due to the pressure switch
opening.
E272 Soft lockout - Exceeded maximum number of
recycles. Last recycle due to the pressure switch
opening
E273 Soft lockout - Exceeded maximum number of
recycles. Last recycle due to flame failure
E274 Soft lockout - Exceeded maximum number of
recycles. Last recycle failed due to the limit circuit
opening or limit remained open longer than 3
minutes.
E275 Soft lockout - Flame sensed out of sequence.
Flame signal is gone.
E276 Soft lockout calibration failure.
Action Required to Clear and Recover
Check operation of low pressure switch closing on heat
call. Measure operating pressure (inches w.c.). Inspect
vent and combustion air inducer for correct operation
and restriction. Resumes normal operation after fault is
cleared.
Unable to perform pressure switch calibration. Check
vent system and pressure switch wiring connections.
Resumes normal operation after fault is cleared
IFC switched to high fire ignition because low fire
pressure switch did not close in allowed time. No action
is needed.
Check micro-amperes of flame sensor using control
diagnostics or field installed mode. Clean or replace
sensor. Measure voltage of neutral to ground to ensure
good unit ground. Alert clears after current heat all has
been completed.
Shut off gas. Check for gas valve leak. Replace if
necessary. Alert clears when fault is recovered.
Check for proper firing rate on furnace. Ensure there is
no blockage in heater. Check for proper air flow. If limit
not closed within 3 minutes unit will go into 1 hour soft
lockout. Resumes normal operation after fault is cleared.
Check temperature rise airflow and input rate. Clear
when heat call is finished.
Check for proper gas flow. Ensure that igniter is lighting
burners. Check flame sensor current. Clears when heat
call finishes successfully.
Check pressure (inches w.c.) of low pressure switch
closing on heat call. Measure operating pressure (inches
w.c.). Inspect vent and combustion air inducer for correct
operation and restriction. Clears when heat call finishes
successfully.
Check operation of low pressure to see if it is stuck
closed on heat call. Check pressure (inches w.c.) of high
pressure switch closing on heat call. Measure operating
pressure. Inspect vent and combustion air inducer for
correct operation and restriction. Clears when heat call
finishes successfully.
Check micro-amperes of flame sensor using control
diagnostics or field installed mode. Clean or replace
sensor. Measure voltage of neutral to ground to ensure
good unit ground. Alert clears after current heat call has
been completed.
Shut down system 1-hour soft lockout. Check firing rate
and air flow. Check for blockage. Clears when heat call
finishes successfully.
Shut off gas. Check for gas valve leak. 1-hour soft
lockout. Clears when flame has been proven stable.
Unable to perform pressure switch calibration. Check
vent system and pressure switch wiring connections.
1-hour soft lockout. Clears when calibration has finished
successfully.
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