A.O. Smith 120 through 250 Series - Manual (Page 69)

Instruction manual BFC 69
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13 Troubleshooting
13.1 Introduction A distinction is made between:
•
General errors
General errors are not reported on the display. General errors are:
-
Gas smell
- Display does not light up
- Insufficient or no hot water.
- Water leakage
- Explosive ignition.
The manual includes a table with general errors (13.2 "Troubleshooting
table for general errors") .
• Displayed errors
Errors are reported on the display, as follows:
-
Line one: an error code and a brief description. The code consists of a
letter and two digits.
- Lines two, three and four: a long description, alternating with a
recommended action. See the figures. The first shows a possible
error, the second shows the appropriate checking action.
There are various types of errors, all falling into one of two groups:
-
LOCK OUT ERRORS
When the cause has been removed, these errors require a reset with
the
button, before the appliance can resume operation.
- BLOCKING ERRORS
These errors disappear automatically once the cause of the error has
been removed, after which the appliance resumes operation by itself.
The manual includes a table of error messages that can appear on the
(13.3 "Troubleshooting table for displayed errors") .
S02: SENSOR ERROR
TOP TANK
SENSOR 1
NOT CONNECTED
S02: SENSOR ERROR
CHECK TOP TANK
SENSOR