A.O. Smith SGS - 100, Installation & Service Manual

Page: 86 / 110

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