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ECONCEPT ST
4.3 Maintenance
Periodical check
To keep the unit working properly over time, it is necessary to have qualified personnel
make an annual check that includes the following tests:
•
The control and safety devices (gas valve, flow meter, thermostats, etc.) must func-
tion correctly.
•
The fume extraction circuit must be fully efficient.
•
The airtight chamber must be sealed
•
The air-fume end piece and ducts must be free of obstructions and leaks
•
The condensate evacuation system must be efficient with no leakage or obstructions.
•
The burner and exchanger must be clean and free of scale. When cleaning, do not
use chemical products or wire brushes.
•
The electrode must be free of scale and properly positioned.
•
The gas and water systems must be airtight.
•
The water pressure in the cold water system must be about 1 bar; otherwise, bring
it to that value.
•
The circulation pump must not be blocked.
•
The expansion tank must be filled.
•
The gas flow and pressure must correspond to that given in the respective tables.
A
The boiler casing, panel and aesthetic parts can be cleaned with a soft damp
cloth, possibly soaked in soapy water. Do not use any abrasive detergents and
solvents.
Opening the casing
To open the boiler casing:
1.
Undo the screws A (see fig. 27).
2.
Turn the casing (see fig. 27).
3.
Lift the casing.
B
Before carrying out any operation inside the boiler, disconnect the electrical
power supply and close the gas cock upstream
A
1
A
fig. 27 - Opening the casing
Combustion analysis
Combustion can be analysed through the air sampling point (detail 2) and fume sam-
pling point (detail 1) shown in fig. 28.
To make the measurement, it is necessary to:
1.
Open the air and fume sampling points
2.
Insert the probes
3.
Press the "+" and "-" buttons for 5 seconds to activate the TEST mode
4.
Wait 10 minutes for the boiler to stabilise
5.
Take the measurement
For natural gas the CO
reading must be between 8.7 and 9%.
2
For LPG the CO
reading must be between 9.5 and 10%.
2
A
Analyses made with an unstabilised boiler can cause measurement errors.
2
1
fig. 28 - Combustion analysis
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault,
the display will flash together with the fault symbol (detail 22 - fig. 1) indicating the fault
code (detail 21 - fig. 1).
There are faults that cause permanent shutdown (marked with the letter "A"): to restore
operation just press the RESET button (detail 8 - fig. 1) for 1 second or RESET on the
optional remote timer control if installed; if the boiler fails to start, it is necessary to first
eliminate the fault.
Other faults (marked with the letter "F") cause temporary shutdowns that are automati-
cally reset as soon as the value returns within the boiler's normal working range.
Table. 5 - List of faults
Fault code Fault
3
2
1
2
cod. 3540S814 -
/201
Possible cause
No gas
Detection/ignition electrode
fault
A01
No burner ignition
Faulty gas valve
Insufficient gas supply pres-
sure
Trap blocked
Electrode fault
Flame present signal
A02
with burner off
Card fault
Heating sensor damaged
Overtemperature pro-
A03
No water circulation in the
tection activation
system
Air in the system
A04
Fume extraction duct
Fault F07 generated 3 times
safety device activation
in the last 24 hours
Fan protection acti-
Fault F15 generated for 1
A05
vated
hour (consecutive)
Ionisation electrode fault
Flame unstable
No flame after ignition
A06
stage (6 times in 4 min-
Gas valve Offset fault
utes)
air/fume ducts blocked
Trap blocked
The exchanger probe detects
F07
High fume temperature
and excessive temperature
for over 2 minutes
Sensor damaged
F10
Delivery sensor 1 fault
Wiring shorted
Wiring disconnected
Sensor damaged
F11
Return sensor fault
Wiring shorted
Wiring disconnected
Sensor damaged
F12
DHW sensor fault
Wiring shorted
Wiring disconnected
Probe damaged
F13
Exchanger probe fault
Wiring shorted
Wiring disconnected
Sensor damaged
F14
Delivery sensor 2 fault
Wiring shorted
Wiring disconnected
No 230V power supply
F15
Fan fault
Tachometric signal interrupted Check the 5-pin connector wiring
Fan damaged
Incorrect system water
The pressure is reaching the
F21
pressure
maximum value
System protection acti-
Fault "F40" generated 3 times
A26
vation
in the last hour
Supply voltage under
F34
Electric mains trouble
170V
F35
Faulty mains frequency Electric mains trouble
Pressure too low
Incorrect system water
F37
pressure
Sensor damaged
Probe damaged or wiring
shorted
F39
External probe fault
Probe disconnected after acti-
vating the sliding temperature
Incorrect system water
F40
Pressure too high
pressure
Delivery sensor disconnected
A41
Sensor positioning
from the pipe
F42
Heating sensor fault
Sensor damaged
System water pressure
F47
Wiring disconnected
sensor fault
(Rev. 00)
Cure
Check the regular gas flow to the boiler and that
the air has been eliminated from the pipes
Check the wiring of the electrode and that it is
correctly positioned and free of any deposits
Check the gas valve and replace it if necessary
Check the gas supply pressure
Check the trap and clean it if necessary
Check the ionisation electrode wiring
Check the card
Check the correct positioning and operation of
the heating sensor
Check the circulating pump
Vent the system
See fault F07
See fault F15
Check the position of the ionisation electrode
and replace it if necessary
Check the burner
Check the Offset adjustment at minimum power
Remove the obstruction from the flue, fume
extraction and air inlet ducts and terminals
Check the trap and clean it if necessary
Check the exchanger
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the wiring or replace the exchanger probe
Check the wiring or replace the sensor
Check the 3-pin connector wiring
Check the fan
Check the system
Check the safety valve
Check the expansion tank
See fault F40
Check the electrical system
Check the electrical system
Fill the system
Check the sensor
Check the wiring or replace the sensor
Reconnect the external probe or disable the slid-
ing temperature
Check the system
Check the safety valve
Check the expansion tank
Check correct positioning and operation of the
heating sensor
Replace the sensor
Check the wiring
EN
41
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