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6.3.4 HEATER SAFETY
FLOW FAILURE
If the error E3 appears on the display, the boiler has detected a flow failure in the heating circuit.
The possible causes of this error are:
-
A blocked pump.
-
All the thermostat valves are closed and there is no circuit that permits the water return.
-
The circuit pressure is insufficient.
-
The heating circuit is blocked.
After solving the cause of the error, the boiler must be turned off and re-started to eliminate the display message.
HEATER OVERHEATING
If the boiler detects an overheating in the heating circuit the safety thermal limiter will operate. The boiler will be
switched off.
Once the cause of the overheating has been eliminated, the thermal limiter must be re-armed.
HEATING SAFETY VALVE
A safety valve set at 3 kg/cm
2
will activate if the pressure of the heating circuit passes said value, expelling water. It
is essential that this valve runs to a drain.
To do so, unscrew the black cap and push
the small pin behind it until you hear a
click.
The limiter will not re-arm until the
temperature in the heating header goes
below 100°C or 80°C if the boiler is
adapted for radiant floor heating.
Summary of Contents for CMX15
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