Beretta Mynute Green E 25 C.S.I. Installer And User Manual page 11

To restore operation (reset alarms):
Faults A 01-02-03
Set the mode selector to
it to the desired position
attempts do not reactivate the boiler, request the intervention of the
Technical Assistance Centre.
Fault A 04
In addition to the fault code, the digital display displays the symbol
.
Check the pressure value indicated by the water gauge:
if it is less than 0.3 bar, position the function selector on
adjust the filling tap until the pressure reaches a value between 1
and 1.5 bar.
"Then position the mode selector to the desired position
mer) or (winter).
The boiler will carry out a venting cycle lasting about 2 minutes.
If pressure drops are frequent, request the intervention of the Tech-
nical Assistance Centre.
Fault A 06
The boiler functions normally but does not guarantee a constant do-
mestic hot water temperature, which remains set at around 50°C.
Contact the Technical Assistance Centre.
Fault A 07
Contact the Technical Assistance Centre.
Fault A08
Contact the Technical Assistance Centre.
Fault A09
Set the mode selector to
it to the desired position (summer) or (winter). If the reset attempts
do not reactivate the boiler, request the intervention of the Technical
Assistance Centre.
Fault A09
The boiler is equipped with an auto-diagnostic system which, based
on the total number of hours in certain operating conditions, can sig-
nal the need to clean the primary exchanger (alarm code 09 with flue
gases probe counter >2,500).
Once the cleaning operation has been completed, reset to zero the
total hour meter with special kit supplied as an accessory following
procedure indicated below:
disconnect the electrical supply;
remove the shell and turn the instrument panel;
remove the electrical parts inspection cover, undoing the 2 fixing
screws;
as you electrically power the boiler press the CO button for at least 4
seconds to check that the counter resets. Remove and restore pow-
er to the boiler; on the display the counter is shown after the "-C-"
indication.
Live electrical parts (230 Vac).
NOTE
The meter resetting procedure should be carried out after each in-
depth cleaning of the primary exchanger or if this latter is replaced.
To check the status of the totalled hours multiply the value shown by
100 (ex: shown value of 18 = pre totalled 1800 – shown value of 1=
totalled hours 100). The boiler continues to operate normally even
with the alarm active.
Fault A77
The fault is self-resetting, if the boiler does not restart contact the
Technical Assistance Centre.
4.5 Boiler configuration
On the electronic card there is a series of jumpers (JPX) which allow
the boiler to be configured; access is possible by removing the elec-
trical parts inspection cover after setting the main switch to off.
(OFF), wait 5-6 seconds and then return
(summer) or (winter). If the reset
(OFF), wait 5-6 seconds and then return
To access the card operate as follows:
- set the system's main switch to off
- undo the shell fixing screws, then move the shell base forward and
then upwards to unhook it from the chassis
- lift and then turn the instrument panel upside down
- remove the electrical parts inspection cover, undoing the 2 fixing
screws to access the jumpers (fig. 38)
JUMPER JP7 - fig. 39:
pre-selection of the most appropriate boiler heating temperature ad-
justment field depending on the type of system.
OFF and Jumper not on - standard system
Standard system 40-80 °C.
Jumper on - floor system
(sum-
Floor system 20-45 °C.
From the factory the boiler is configured for standard systems.
JP1 Enabling front knobs for calibration
JP2 Heating timer reset
JP3 Calibration (see "Adjustments" section)
JP4 Absolute domestic hot water thermostat selector
JP5 do not use
Enable night-time compensation function and pump in
JP6
continuous mode (only with external probe connected)
Enable standard/low temperature systems
JP7
management (see above)
JP8 Do not use
4.6 Setting the thermoregulation
Thermoregulation works only with the external probe connected,
therefore, once installed, connect the external probe to the specific
connection provided on the boiler terminal board.
This enables the THERMOREGULATION function.
Choice of the compensation curve
the display shows the value of the KT curves multiplied by 10
(example 3.0 = 30)
100
90
T80
80
70
60
50
T45
40
30
20
20 15
T80 - maximum std system heating set point temperature
(JP7 not on)
T45 - maximum floor system heating set point temperature
(JP7 on)
The compensation curve for heating maintains a theoretical temper-
ature of 20°C indoors, when the external temperature is between
+20°C and -20°C. The choice of the curve depends on the minimum
external temperature envisaged (and therefore on the geographical
location), and on the delivery temperature envisaged (and therefore
Mynute Green E C.S.I.
THERMOREGULATION CURVES
CURVE DI TERMOREGOLAZIONE
3,0 2,5
10 5 0 -5
Temperatura esterna (˚C)
Outside temperature [°C]
2,0
1,5
1,0
0,8
0,6
0,4
0,2
-10 -15 -20
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