Press the diagnostic push button and hold it to cycle through a menu of options. Every five seconds a new menu item will be
displayed.
Release the button when the desired mode is displayed.
When the solid "E" is displayed, the control enters the Error Code Recall mode. Error Code Recall mode menu options: No
change (displaying error history) remains in Error Code Recall mode; solid "b" exits Error Code Recall mode; and solid "c"
FLASH CODE DIAGNOSTIC CODES/STATUS OF FURNACE
- Idle Mode (Decimal blinks at 1 Hz 0.5 sec. On and 0.5 sec. Off)
A CFM Displayed (1 sec. On, 0.5 sec. Off, CFM value)
C Staged Cooling (1 sec. On 0.5 sec. Off 1 or 2 stage 1 Sec. pause CFM pause, Repeat Codes)
d Dehumidification Mode (1 sec. On, Off 1 sec., CFM, Pause, Repeat Codes)
h Modulating Heat (1 sec. On 0.5 sec. Off % of input rate Pause CFM Pause Repeat Codes)
H Staged Heat (1 sec. On 0.5 sec. Off 1 or 2 stage 1 Sec. CFM pause, Repeat Codes)
110 Low Line Voltage
113 High Line Voltage
115 Low 24V (*control will restart if the error recovers).
125 Control failed self check, internal error, failed hardware. Control will restart if the error recovers.
180 Outdoor Air sensor failure - no error if just disconnected, only show if shorted or out of range
200 Rollout circuit open or previously opened
201 Circulator/COM failure - no error is if just disconnected, only show if shorted or out of range
202 Circulator motor/resistor mis-match or resistor missing
204 Gas Valve Miswired - Resume normal operation after error corrected
223 Low Pressure Switch Failed Open
224 Low Pressure Switch Failed Closed
225 High Pressure Switch Failed Open
226 High Pressure Switch Failed Closed
227 Low Pressure Switch Opened during TFI or Run mode
228 Unable to perform successful pressure switch calibration routine
240 Low Flame Current - Run Mode
241 Flame sense out of sequence - flame still present
250 Limit switch circuit open
270 Exceed maximum number of retries. No flame current sensed.
271 Exceeded maximum number ignition retries where the last retry was due to the pressure switch opening.
272 Exceeded minimum number of recycles where the last recycle was due to the pressure switch opening.
273 Exceeded maximum number of recycles where the last recycle was due to a flame failure.
274 The limit remained open longer than three minutes.
275 Flame sensed out of sequence; flame signal gone.
290 Ignitor Circuit Fault - failed ignitor or triggering circuitry
291 Restricted airflow - available CFM below min firing rate
292 Circulator motor unable to start (seized bearings, stuck wheel, etc.)
294 Inducer motor amp draw too high
310 Discharge Air sensor failure - no error if just disconnected, only show if shorted or out of range
311
Restricted airflow heating mode - target input rate reduced to match available circulatory CFM
312 Restricted airflow cooling or continuous fan mode - informational only
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