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11.4 Validity of the modifications to the parameters
The modifications made to the parameters normally take effect when confirmed with the SEL button, and are saved
permanently with the PRG button. For some parameters relating to the serial connection, the value will only take effect only
the next time the unit is switched on. During the programming phase, 5 seconds after the last button is released, the display
begins flashing (to remind the user that he is in programming phase). Sixty seconds after the last button is released, if the
value of a parameter is being displayed, any modifications are ignored and the display returns to the parameter's identifying
code. After a further 5 seconds, the display begins flashing again, and after 60 seconds the programming phase is terminated
and the parameters return to the values previous to the programming phase. If, on the other hand, the parameter's identifying
code is being displayed, the programming phase is terminated directly after 60 seconds (time out).
11.5 Recalling the default parameters
The default values can be recalled only on start-up, and in the following way:
in the first 5 seconds from start-up (while the three dashes are displayed), press the PRG button until the upper dash in the
centre flashes, as indicated in the Figure;
release the PRG button within 3 seconds to confirm the recall and permanent saving of the default parameters; to confirm the
saving of the values, the upper dash will stay on for 2 seconds (as displayed in Fig. 11.5.1);
the operation is not effected if the PRG button is pressed for more than 3 seconds, until the upper dash disappears.
Recalling the default parameters does not change the parameter relating to the unit of measure (A1), it is thus
recommended to check and if necessary select and save the unit of measure as required, and then recall the default parameters.
In this way the default values will automatically be converted.
Resetting the hour counter
To reset the hour counter (parameter d4), proceed as follows:
press the PRG button for 5 seconds, until the code P0 is displayed, indicating the first modifiable parameter; using the
and
buttons, scroll the parameters until d4 is displayed;
press the SEL button to display the value of the hour counter (preceded for 1 second by the unit of measure);
press the
and
buttons together for 5 seconds until the value is set to zero, preceded by a brief flash.
11.6 Displaying and modifying the unit of measure
The unit of measure of some parameters depends on the type of control and the programming. Displaying the unit of measure
can thus avoid incorrect interpretation. In the case of non-dimensional measurements, the unit of measure is not displayed. It is
also possible to use imperial rather than standard units of measure (parameter A1). For the procedure to be followed please
refer to: Programming: accessing type A, b and C parameters.
The two digits on the right are used to display the unit of measure:
display unit of measure
°C
temperature in degrees centigrade
temperature in degrees Fahrenheit
°F
rH
relative humidity in %
steam production in kg/h
Pr
Lb
steam production in pounds/h
Carel code +030221761
(factory settings)
flashing
Fig. 11.5.1
Tab. 11.7.1
37
press for 5 s.
on starting
the machine
display unit of measure
M"
time in seconds
time in minutes
M'
h
time in hours
uS
conductivity S/cm
O
percent
O
preliminary version - rel. 2.0 - 03/09/99
heaterSteam
Tab. 11.7.2
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Troubleshooting
