Euroterm SI S Instructions D'utilisation, D'installation Et D'entretien page 11

SI S
4.2 Start-up
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 system.
• 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 correctly.
• Check proper lighting of the water heater by doing several tests, turning it on and off
with the room thermostat or remote control.
• Make sure the fuel consumption indicated on the meter matches that given in the
technical data table on cap. 5.
4.3 Maintenance
Periodical check
To ensure correct operation of the unit over time, have qualified personnel carry out a
yearly check, providing for the following:
• The control and safety devices (gas valve, flowmeter, etc.) must work properly.
• 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 cleaning, do not
use chemical products or wire brushes.
• The electrode must be properly positioned and free of scale.
= =
fig. 12 - Electrode positioning
• The gas and water systems must be tight.
• The gas flow and pressure must correspond to that given in the respective tables.
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
Table. 6
Fault
Fault
code
A01 No burner ignition
Flame present signal with
A02
burner off
Overtemperature protection
A03
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
cod. 3541A750 - 05/2011 (Rev. 00)
Possible cause Cure
Check the regular gas flow to the water
No gas heater and that the air has been elimi-
nated 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
Wiring shorted Check the wiring or replace the sensor
Wiring disconnected
Sensor damaged
Wiring shorted Check the wiring or replace the sensor
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 discon-
Check the wiring
nected
Check the gas valve and replace it if
Faulty gas valve
necessary
Inlet/exhaust flue obstruction Check the flue
EN 11