Maintenance
Installation, use and maintenance manual – GAHP A
33
7
Table 7.2
GAHP A
GAHP GS/WS
AY00-120
GA ACF
GAHP-AR
Ordinary scheduled maintenance
Check of the unit
clean the combustion chamber
√ (1)
√ (1)
√
√
√ (1)
clean the burner
√ (1)
√ (1)
√
√
√ (1)
clean the ignition and flame sensor electrodes
√
√
√
√
√
check that the condensate discharge is clean
√
√
√
-
-
replace the silicone gasket between the front plate and the exchanger
-
-
√
-
-
(1) Only in case the analysis of combustion products is non-compliant.
7.4
MESSAGES ON THE DISPLAY
7.4.1
4 digit display
The S61 board of the appliance (Paragraph 1.5
p. 13, Figure
5.1
p. 30) is fitted with a 4-digit display, visible through the
sight glass of the front panel.
▶
When the appliance is powered on, all the LEDs switch on for
3 sec, then the board name is displayed.
▶
After another 15 sec, the appliance is ready to operate.
7.4.2
Signals in normal operation
▶
During normal operation, water temperature values alter-
nate on the display: output, input and the difference be-
tween the two.
7.4.3
Signals in the event of fault
In the event of fault the display blinks indicating an operational
code (first letter on the display: "E" = error, or "U" = warning).
The display rotates after the values of the outlet water tempera-
ture, the inlet and the difference between them.
If multiple events are active, they are shown in sequence, or-
dered by increasing code number.
If warning or error events are active, the left green symbol,
shown together with water temperature data, blinks.
If it is a permanent error or warning the appliance stops.
(Table 8.1
p. 34).
7.5
RESTARTING A LOCKED-OUT UNIT
7.5.1
Fault signals on the display
In the event of locked-out 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
▶
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.
7.5.2
Locked-out 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 fault.
▶
For a fault or breakdown, alert the maintenance technician
or TAC.
7.5.3
Reset
There are two options for resetting a fault:
1. If the appliance is connected to a DDC you may act through
the control device, as described in the relevant manual.
2. You may act directly from the S61 board as described below
(if the appliance is controlled with external request, this is
the only option).
How to perform reset from the S61 board
To perform the reset directly from the board:
1. Access Menu 2 under Parameter "_20", to reset flame block
(Error E412), or Parameter "_21", for any other generic re-
set, turning and pressing the knob; "2._20"/"2._21" must
be displayed (procedure Paragraph 5.2
p. 30).
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.
7.6
PERIODS OF INACTIVITY
Avoid emptying the installation
Emptying the system may cause damage due to corro-
sion of the water pipes.
Deactivate the system in winter
Should you intend to stop the appliance in the winter
season, ensure at least one of the following conditions:
1. antifreeze function active (Paragraph 3.5 p. 20)
2. sufficient antifreeze glycol (Paragraph 3.6 p. 21)
7.6.1
Prolonged periods of inactivity
Should you foresee to leave the appliance inactive for a long
period of time, disconnect it from the electrical and gas mains.
These operations must be performed by qualified personnel.
How to deactivate the appliance for long periods of
time
1. Switch the appliance off (Paragraph 6.2 p. 31).
2. Only when the appliance is completely off, power it off
with the main switch/disconnector switch (Detail GS in
Figure 4.2
3. Close the gas valve.
4. If necessary, add water with glycol (if the appliance is
disconnected from the power and gas mains, the active
antifreeze protection is missing, Paragraph 3.5
p. 20).
How to reactivate the appliance after long periods of
Summary of Contents for GAHP A indoor
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