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18-CE09D1-1E-EN
Integrated Furnace Control Display Codes
Menu Options
IdL Idle
err Active Alarm Menu
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 (Use only 1–1. 2–1 not applicable for S8B1)
HOD
Heat Off Delay (Seconds)
C0f Continuous Fan
C0P
Compressor Airflow
HTP
Gas Heating Airflow
ORN LED Orientation
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
e3.2
Open Pressure Switch
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.!
Gas valve (MVL) is energized when it should be off
e08
Flame current is low, but still strong enough to allow operation
e11
Gas valve not energized when it should be
Gas valve relay stuck closed
e12
Open fuse
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