A.O. Smith 240 T-H3J Service Manual page 57

Error Code
941
1 Check how long the water heater has been installed and in use.
2 Check the vent length.
the water heater has been installed in laundry room.
system is recirculation. Recirculation system with high temperature
Error Code
(Refer to section 12-3)
991
2 Check how long the water heater has been installed and in use.
3 Check the installation place.
installed.
5 Check the vent length.
the water heater has been installed in laundry room.
water heater has been installed in restaurant.
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Malfunction description
Diagnosis
Malfunction description
Diagnosis
57
Page
CONFIDENTIAL
Cancellation method
Check point
Cancellation method
more than 3 sec.
Check point
Ver. 1.00