E11 Flame rollout switch open

What the control is telling you

A manual-reset flame rollout switch on the burner/manifold area has opened - flame came out of the burner box. The circulator blower runs continuously and the furnace will not fire.

Applies to: Daikin DR96TN (upflow/horizontal) and DD96TN (downflow/horizontal) two-stage 96% furnaces with 9-speed ECM motor, R-32 ready

Likely causes

• Wrong gas pressure / overfiring or wrong orifices
• Burners misaligned or restricted; orifice plate out of position
• Flame impingement, burners with oversized cross-over slots
• Air leaking around or through the heat exchanger (possible cracked heat exchanger)
• Blocked flue

Test and repair steps

1. Warning: a rollout trip means flame left the burner box - find the cause before putting the furnace back in service.
2. Remove the burner door, press the reset on the rollout switch and check it for continuity with an ohmmeter; replace it if it will not stay closed.
3. Check inlet and manifold gas pressure against the rating plate and the orifice size.
4. Check burner alignment, the orifice/heat exchanger plate position and look for burner or flue restriction.
5. Inspect the heat exchanger for leaks; check for air leaking into the burner compartment.
6. Run a full heat cycle and watch the flame pattern before leaving.

Settings for these units

• Normal status displays (7-segment) · Daikin DR96TN/DD96TN