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108
18-CE12D1-1D-EN
Integrated Furnace Control Display Codes
Menu Options
IdL
Idle
err
Active Alarm Errors
L6F
Last 6 Faults (To clear — Hold Option button down for 5 seconds after entering the
L6F
menu)
Cr
Code Release Number
C0d
Cooling Off Delay (Seconds)
0du
Outdoor Unit Type
C0f
Blower Constant Fan Airflow
X0d
Heat Off Delay (Seconds)
ISD
Inter-Stage Delay (Seconds)
GHC
Gas Heating CFM (1st and 2nd stage airflow are selectable)
run
Test Mode
Error Codes
Alarm Error Code
Alarm Explanation
e0!
Loss of the IRQ or other internal failures (Internal IFC error)
e2.!
Retry Exceeded (Flame never sensed, one hour lockout after 3 times)
e2.2
Recycles Exceeded (Flame sensed then lost, one hour lockout after 10 times)
e2.3
1st Stage Gas Valve Not Energized When It Should Be exceeded after 10 times
e3.!
Shorted Pressure Switch, 1st Stage
e3.2
Open Pressure Switch, 1st Stage
e3.3
Shorted Pressure Switch, 2nd Stage (Not applicable for S9X1/S9B1)
e3.4
Open Pressure Switch, 2nd Stage (Not applicable for S9X1/S9B1)
e04
Open Limit (Main Thermal, Rollout Switch, or Reverse Airflow Switch)
e0s
Flame detected, should not be present
e6.!
Voltage reversed polarity
e6.2
Bad grounding
e6.3
(1) Igniter relay fails
(2) Igniter open
e7.!
1st Gas valve (MVL) is energized when it should be off
e08
Flame current is low, but still strong enough to allow operation
e09
Open Inducer Limit Switch or Condensate Pressure Switch
e11
(1) 1st stage gas valve not energized when it should be
(2) 1st stage gas valve relay stuck closed
(3) 2nd stage gas valve relay stuck closed (Not applicable for S9X1/S9B1)
(4) 2nd stage gas valve energized when it should not be (Not applicable for S9X1/S9B1)
(5) 2nd stage gas valve not energized when it should be (Not applicable for S9X1/S9B1)
e12
Open fuse