Maintenance
Installation, use and maintenance manual – AY00-120
25
7
display of detected temperature data.
Do not modify complex settings
Specific technical and system knowledge is required for
complex settings. Contact a TAC.
Thermal input setting
The appliance is Range Rated. The thermal power can be ad-
justed by regulating the gas flow. The adjustment is made with
parameter 180, from a maximum power of 34,9 kW to a mini-
mum power of 8,0 kW. If multiple appliances are connected to
the same system, the parameter value must be the same for all
appliances.
6.6
RESTARTING A LOCKED-DOWN UNIT
Fault signals on the display
In the event of locked-down appliance, an operational code
flashes on the display (first green figure on the left, letter "U" =
warning or "E" = error).
▶
To restart the appliance you must know and perform the
procedure concerning the issue signalled and identified by
the code (Paragraph 8.1
p. 28).
▶
Only act if you are familiar with the issue and with the pro-
cedure (technical expertise and professional qualifications
might be required).
▶
If you do not know the code, the problem, or the procedure,
or you do not have sufficient skills, and in any case of doubt,
contact the TAC.
Locked-down appliance
An external intervention (reset or repair) is required due to an
appliance fault or problem with the system.
▶
A reset may be enough for a temporary and provisional
anomaly.
▶
For a fault or breakdown, alert the maintenance technician
or TAC.
Reset
There are two options for resetting a fault:
(1) If the appliance is connected to a DDC or to a CCP/CCI you
may act through the control device, as described in the relevant
manual.
(2) You may act directly from the AY10 board as described below
(if the appliance is controlled with external enable, this is the on-
ly option).
How to perform reset from the AY10 boards
To perform the reset directly from the AY10 board:
1. Access Menu 2 under Parameter "_20", to reset flame lock-
out (Error E.112), or Parameter "_21", for any other gener-
ic reset, turning and pressing the knob; "2._20"/"2._21"
must be displayed (procedure Paragraph 6.4
p. 23);
2. Press the knob to display the flashing reset request (e.g.
"reS1" to reset flame block).
3. Press the knob again (the second time) to perform the
reset; the reset request stops flashing, then "2._XX" is dis-
played again (e.g. "2._20"). The reset operation has been
performed.
4. Exit menu 2 and the menu list, by selecting and pressing
letter "E" twice, and go back to the normal display of de-
tected temperature data.
6.7
EFFICIENCY
For increased appliance efficiency:
▶
Adjust the maximum water temperature to the actual sys-
tem requirements;
▶
Reduce repeated switch-ons to the minimum (low loads);
▶
Program appliance activation for actual periods of use;
▶
Keep water and air filters on plumbing and ventilation sys-
tems clean.
7
MAINTENANCE
7.1
WARNINGS
Correct maintenance prevents problems, assures effi-
ciency and keeps running costs low.
Maintenance operations described herein may exclu-
sively be performed by the TAC or skilled maintenance
technician.
Any operation on internal components may exclusively
be performed by the TAC.
Before performing any operation, switch off the appli-
ance by means of the control device (DDC, CCP/CCI or
external request) and wait for the end of the switching
off cycle, then disconnect power and gas supply, by
acting on the electrical disconnecter and gas cock.
The efficiency checks and every other "check and mainte-
nance operation" (see Tables 7.1
p. 26 and 7.2 p. 26)
must be performed with a frequency according to cur-
rent regulations or, if more restrictive, according to the
provisions set forth by the manufacturer, installer or TAC.
Responsibility for efficiency checks, to be carried out for
the aims of restricting energy consumption, lies with the
system manager.
Environmental or operational heavy conditions
In environmental or operational conditions particularly
heavy (for example: heavy-duty use of the appliance,
salty environment, etc.), maintenance and cleaning op-
erations must be more frequent.