A.O. Smith ADMR-40 Installation, User And Service Manual page 75

Symptom Cause
F11 (blocking error) Defective gas valves
Flame detection with
closed gas valve.
F12 (lock out error) Chimney flue blocked
The flue gas backflow
safeguard is activated.
F13 (lock out error) The motor fails to open
the flue damper
Flue damper not driven
by the motor
F14 (lock out error) The microswitch fails to
detect the position of
the flue damper
The microswitch fails to
monitor the position of
the flue damper
Instruction manual ADMR
Solution
See F07.
1. Check for blockages in the chimney flue pipe
2. Remove any blockages
3. Reset electronic controller.
See F10
1. Check that the red arrow on the motor goes fully to the right
and/or left
2. Check that the microswitch is activated when the damper
rotates
Remark
If the error cannot be resolved or is persistent, contact your
installation engineer
If the error cannot be resolved or is persistent, contact your
installation engineer
If the error cannot be resolved or is persistent, contact your
installation engineer
is
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