No. Error code Cause Check method
9
031
Burner
overheating
prevention
When the burner
overheating fuse
has been opened for
one second and it
has been detected
consecutively
for more than
0.5 seconds,
overheating of the
burner occurs.
1. Check damage to the burner.
An error occurs due to overheating of the burner. Separate the mixing chamber, check
the burner, and, if necessary, change it to a new one. Detail observation is needed to
discover a problem such as the burner’s drooping, tearing, or scraping. Change to a
new one if the current burner has a problem. Or, move on to the next step below.
2. Check if the temperature fuse harness is disconnected.
If the problem persists after completing “1” (when it has been assured that there
is no problem with the burner and the burner has been reconnected), check if the
temperature fuse harness is disconnected.
3. Change the temperature fuse.
If the problem persists after completing “1” and “2,” change the temperature fuse.
4. Change the PCB.
If the problem persists after completing all the actions above, change the PCB.
Temperature fuse Mixing chamber assembly
Temperature
fuse connector
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