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6. SAFETY SYSTEM OF THE DEVICE
MAKTEK Omega LCD Electric Combi Boiler has the following safety features in order to
ensure the highest level of safety and highest technology.
6.1 RCD DEVICE (SHORT CIRCUIT RELAY)
In case of short circuit, the relay shuts off the electricity connection and prevents any
possibility of electruction, protecting human health and safety. For the RCD device to work
properly, earth connection with proper dimension and ground resistance must be connected
to the boiler by a certified electrician.Failure to do so will cause the RCD device to
malfunction. In such a case, the manufacturer is not responsible for any harms to people or
environment.
6.2 HEATING TANK FLOAT WATER LEVEL SENSOR (H6)
This sensor prevents the boiler from running without sufficient water inside the heating tank
therefore avoids any damage to the resistances. In case of low water level, H06 is displayed
on the device's screen. The air trapped must be completely removed from the air vent valve
which is placed on top of the device. If the water pressure drops after the air is taken, the
display shows H03. In this case, water should be added from the filling valve.
6.3 LOW / HIGH WATER PRESSURE
If the pressure at the heating circuit is below 0.7 bar, the boiler will not operate and the H3
warning code will appear on the digital display,preventing damage which causes from running
without water.
What to Do: The heating system pressure is increased by adding water up to the desired
level by the filling valve. You can view the pressure of the water filled on the LCD screen.
Also if the water pressure increases beyond 2.7bars, H7 high water pressure error is shown
on the display. The pressure should be dropped by discharging water from the drain valve to
continue operation.
6.4 OVERHEAT LIMIT THERMOSTAT
If the water temperature at the heating system is above 93°C, the system energy is cut off by
the mainboard and H5 warning code is shown on the LCD screen.
What to Do: When the water temperature of heating system drops down to 60°C, the boiler
will start working again. If this failure occurs two times consequently, please turn off the boiler
and call an authorized service.
6.5 SAFETY THERMOSTAT
This is a secondary safety measure to prevent overheating in the boiler. If the limit thermostat
does not function and the boiler temperature reaches 96°C, safety thermostat conducts
neutral to the boiler chasis and the RCD device shuts off the electricty supply. Proper earth
connection is required for the safety thermostat to work properly.
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