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SKY F
A - Upstream pressure point
B - Downstream pressure point
R
I - Gas valve electrical connection
R - Gas outlet
S - Gas inlet
B
I
A
TYPE SGV100
Pi max 65 mbar
24 Vdc - class B+A
S
fig. 10 - Gas valve
DHW power adjustment
To adjust the DHW power, switch the boiler to TEST mode (see sec. 4.1). Press the "+"
and "-" buttons (details 1 and 2 - fig. 1) to increase or decrease the power (min. = 00 -
max. = 100). Press the reset button within 5 seconds and the max. power will remain that
just set. Exit the TEST mode (see sec. 4.1).
4.2 Commissioning
Before lighting the water heater
•
Check the tightness of the gas system.
•
Fill the water system and make sure all air contained in the water heater and the sys-
tem has been vented.
•
Make sure there are no water leaks in the system or unit.
•
Check correct connection of the electrical system and efficiency of the earthing sys-
tem.
•
Make sure the gas pressure value is that required.
•
Make sure there are no flammable liquids or materials in the immediate vicinity of
the water heater.
Checks during operation
•
Turn the unit on.
•
Check the tightness of the fuel circuit and water systems.
•
Check the efficiency of the flue and air/fume ducts while the water heater is working.
•
Make sure the gas valve modulates properly.
•
Check correct lighting of the water heater, by turning it on and off several times.
•
Make sure the fuel consumption indicated on the meter matches that given in the
technical data table on cap. 5.
4.3 Maintenance
Periodical inspection
To ensure proper operation of the unit over time, have qualified personnel carry out a
yearly inspection, providing for the following checks:
•
The control and safety devices (gas valve, flow switch, etc.) must function correctly.
•
The fume exhaust circuit must be perfectly efficient.
•
The air/fume terminal and ducts must be free of obstructions and leaks
•
The burner and exchanger must be clean and free of deposits. For possible clean-
ing, do not use chemical products or wire brushes.
•
The electrode must be properly positioned and free of deposits.
=
=
fig. 12 - Electrode positioning
•
The gas and water systems must be tight.
•
The gas flow and pressure must match that given in the respective tables.
1 2 3 4
~ 24W
fig. 11 - Gas valve connection
cod. 3540Z102 - Rev. 02 - 05/2013
4.4 Troubleshooting
Diagnostics
The water heater has an advanced self-diagnosis system. In case of a fault in the unit,
the display will flash together with the fault symbol indicating the fault code.
There are faults that cause permanent shutdown (marked with the letter "A"): to restore
operation press the RESET button (detail 6 - fig. 1) for 1 second. If the water heater fails
to restart, it is necessary to 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 water heater's normal working range.
List of faults
~ 65W
Table. 6
Fault
Fault
code
A01
No burner ignition
Flame present signal with
A02
burner off
Overtemperature protec-
A03
tion activation
F04
Card parameter fault
Card parameter fault
F05
Fan fault
No flame after the ignition
A06
phase
F07
Card parameter fault
A09
Gas valve fault
F10
DHW sensor 1 fault
F14
DHW sensor 2 fault
A16
Gas valve fault
F20
Combustion control fault
A21
Poor combustion fault
F34
Supply voltage under 180V. Electric mains trouble
F35
Faulty mains frequency
A41
Sensor positioning
F42
DHW sensor fault
F50
Gas valve fault
A51
Poor combustion fault
Possible cause
Cure
Check the regular gas flow to the
No gas
water heater and that the air has been
eliminated from the pipes
Check the wiring of the electrode and
Ignition/detection electrode fault
that it is correctly positioned and free
of any deposits
Check gas valve and replace it if nec-
Faulty gas valve
essary
Gas valve wiring disconnected
Check the wiring
Ignition power too low
Adjust the ignition power
Electrode fault
Check the ionisation electrode wiring
Card fault
Check the card
Check the correct positioning and
DHW sensor damaged
operation of the DHW sensor
No water circulation
Check the flowswitch
Check the card parameter and modify
Wrong card parameter setting
it if necessary
Check the card parameter and modify
Wrong card parameter setting
it if necessary
Wiring disconnected
Check the wiring
Faulty fan
Check the fan
Card fault
Check the card
Low pressure in the gas system
Check the gas pressure
Burner minimum pressure setting Check the pressures
Check the card parameter and modify
Wrong card parameter setting
it if necessary
Wiring disconnected
Check the wiring
Check the gas valve and replace it if
Faulty gas valve
necessary
Sensor damaged
Check the wiring or replace the sen-
Wiring shorted
sor
Wiring disconnected
Sensor damaged
Check the wiring or replace the sen-
Wiring shorted
sor
Wiring disconnected
Wiring disconnected
Check the wiring
Check the gas valve and replace it if
Faulty gas valve
necessary
Fan fault
Check the fan and fan wiring
Check the baffle and replace it if nec-
Wrong baffle
essary
Flue obstructed or not correctly
Check the flue
sized
Fault F20 generated 6 times in the
See fault F20
last 10 minutes
Check the electrical system
Electric mains trouble
Check the electrical system
DHW sensor disconnected from
Check the correct positioning and
pipe
operation of the sensor
Sensor damaged
Replace the sensor
Modulating Operator wiring dis-
Check the wiring
connected
Check the gas valve and replace it if
Faulty gas valve
necessary
Inlet/exhaust flue obstruction
Check the flue
EN
12
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