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Remeha Gas 3002 Manual

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12. FAULT-FINDING
Enter code 00 12 using the ' ' and ' ' buttons and
confi rm it with the ' ' button.
- Now select the option 'History data' with the ' ' button
and confi rm it with the ' ' button.
- Now select the lock out or shut down failure memory
using the ' ' button. Confi rm with the ' ' button.
Depending on the option selected, the number of
locking failures stored in the memory (maximum 5 of
each) is now displayed. Failure No. 1 is the failure
which occurred last, failure No. 2 the last but one, etc.
To know which failure occurred last, the failure counter
must be set to 1 using the ' ' and ' ' buttons. When the
' ' button is pressed for confi rmation, the failure in
question is indicated. Using the ' ' button, various
menus can now be called up, all indicating the opera-
tional condition of the boiler at the moment of failure.
In the table below the various failure messages are dis-
played which may appear on the LCD display, followed by
the instructions to eliminate the failure.
For possible measurement methods see chapter 11:
'Commissioning'. When a failure message appears is not
self explanitory, and is not displayed in the table, then
contact our service dep art ment.
Note:
When reporting a failure code, write down the exact mes-
sage and the parameters at which the failure occured.
12.1 General
For troubleshooting use the wiring diagram and the
switching sequence diagram in paragraph 10.9.
The instrument panel is provided with an alphanumeric
LCD display. In the case of failure, the display indicates
the cause of the failure and how long ago the boiler went
into failure mode. The failure and the operating condition
at the time of failure are stored in the memory of the
control unit. Five blocking and fi ve locking failures can be
stored in this memory. If a failure in a boiler repeats itself
several times in rapid succession, this failure is stored
only once. Locking failures can be reset using the reset
button on the instrument panel (' ').
12.2 Faults
In the case of failure, the LCD display indicates the
cause of the failure. It also indicates whether it is a
blocking or locking failure and how long ago it occurred.
In the case of a blocking failure the boiler will automati-
cally restart when the cause of the failure has been
eliminated.
If the same blocking failure has occurred 5 times in rapid
succession the boiler will lock out.
Displaying the operational condition at the time when the
failure occurred speeds up the search for the cause of
failure.
Proceed as follows:
- Select the service level by travelling down the user
menus using the ' ' button.
Fig. 21 N - V controller, boiler with 7 and 9 sections
Fig. 22 N - V controller, boiler with 11 to 19 sections
16.Switch the boiler to full load by selecting option 'Load
maximum' with the ' ' button and confirming it with
the ' ' button.
Compare the CO
2
percentage with the value men-
tioned in the table. Adjust, if necessary, this CO
2
percentage with the V-controller. Switch the boiler to
part load, measure and compare the CO
2
percentage
with the value mentioned in the table and adjust, if
necessary, the value with the N-controller.
17.Repeat this full load/part load switching until the CO
2
percentages at full load/part load come within the
tolerances mentioned in the table.
18.By pressing the ' ' button, the main menu of the
service level reappears. Now set the desired boiler
control, as described in para. 7.3.3. By pressing the
' ' button three times, you return to the main menu
of the user level.
19.After commissioning, enter the set values in the
table on the boiler.
20.Send the CE commissioning report to Broag.
11.3 Switching off the boiler
1. Set boiler controls to off.
2. Allow the system to cool down.
3. Switch off the electrical suppy.
4. Turn off the gas cock.
Please note! Frost protection may be required.
… 31 …


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