A.O. Smith SGS - 100 Installation & Service Manual page 86

Code + Description Cause
F06 (lock out error) Damaged cable in
contact with metal
surface.
Short circuit between
flame probe and earth
Ceramic part of the
flame probe is
broken/cracked.
F07 (lock out error) Defective gas valves
A flame has been
detected after the gas
valve was closed.
F08 (lock out error) Flame detection before
the gas valve opened.
Error message from
safety relay
F09 (lock out error) The temperature at the
top of the tank exceeds
o
93 C.
Water temperature
safety.
Instruction manual SGS
Solution
Check the wiring of the flame probe. If necessary, replace the
wiring.
1. Check that the ceramic part of the flame probe is still intact in
the vicinity of the burner's air distribution plate.
2. If not, the flame probe must be replaced.
1. Check whether there is still burner pressure present after the
gas valves have closed.
2. Check whether a flame is still present after the gas valves have
closed.
3. If this is the case, the gas control must be replaced.
1. Reset the electronic controller.
2. If the error reappears, replace the electronic controller.
1. Check that the circulation pump (if present) is working
2. Check the position of the temperature sensor T
3. Reset appliance controller
Remark
If the error persists, contact your installation engineer.
To replace the necessary parts, you must contact your installation
engineer
If the error cannot be resolved or is persistent, contact your
installation engineer
To replace the necessary parts, you must contact your installation
engineer
If the error cannot be resolved or is persistent, contact your
installation engineer
To replace the necessary parts, you must contact your installation
engineer
If the error cannot be resolved or is persistent, contact your
installation engineer
.
1
is
86