A.O. Smith 30 - Manual (Page 62)

Status of the appliance
62 Instruction manual SGS
8
gis
2. The current time falls outside a set time period
of the week program.
The figure shows the display with the following
information:
-
line one: the text PROG;
- line two: the time, the day and T
1
and T
net
alternately (9.3 "The appliance's heating
cycle") ;
- line three: the next scheduled switch-on
time;
- line four: displays the text
PERIOD ACTIVATED
.
In all modes, the temperature may at any moment
drop below the desired temperature. The appliance
then enters a heating cycle. This heating cycle is
identical
(9.3 "The appliance's heating cycle") for all
basic operating modes.
Note
Setting and if necessary programming of the basic
operating modes are described in the main
menu
(11 "Main menu") chapter.
8.3 Error conditions
The figure shows an example of an error condition. If
the appliance enters this condition, the display will
show the following information:
•
line one: error code comprising a letter and two
digits, followed by the error description;
• lines two to four: alternately, a brief explanation of
the error, and a brief action to resolve the error.
Caution
The displayed action to resolve the error may only
be performed by a service and maintenance engineer.
There are various types of errors:
•
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 display does not show what type of error has been
detected. A comprehensive overview of the errors is
provided elsewhere in the
manual
(13 "Troubleshooting") .
If, as end-user, you find the appliance in an error
condition, you may attempt to restart the appliance by
pressing the
button
However, if the error returns or occurs several times in
a short time you must contact your service and
maintenance engineer.
8.4 Service condition
The figure shows the message
SERVICE REQUIRED .Should this message appear,
then the appliance is in need of a service and
maintenance inspection. In that case, contact your
service and maintenance engineer.
Note
The message SERVICE REQUIREDis based on
the number of expired burning hours and the preset
service interval. Should the service interval have been
incorrectly selected, contact the service and
maintenance engineer for instructions on how to
adjust this. Information on the maintenance frequency
is provided elsewhere in the
manual
(14 "Maintenance frequency") .
8.5 Q/T Sensor warning
This message appears if the Q/T sensor is incorrectly
connected. If the message appears, you must contact
your service and maintenance engineer.
8.6 Collector temperature warning
This message appears whenever the collector
temperature is excessive. This message disappears
automatically. If the message does not disappear, you
must contact your service and maintenance engineer.
S04: SENSOR ERROR
CHECK
SENSOR OR DUMMY
!!! WARNING !!!
MAX. BURNING HOURS:
SERVICE REQUIRED
!!! WARNING !!!
Q/T SENSOR NOT
CORRECTLY CONNECTED
!!! WARNING !!!
TEMPERATURE
COLLECTOR
TOO HIGH