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Integrated Control Diagnostic Codes
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 a solid "P" is displayed, the furnace capacity/ size is programmed.
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"
clears the error history. Must press button while flashing "c" is displayed to clear error codes.
When the solid "-" is displayed, the control enters the Field Test mode. Field Test mode menu options: Solid "C" starts
pressure switch calibration; blinking "-" exits Field Test mode.
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
506552-01
Issue 1034
Page 43 of 52
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