Operation Manual

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16/09/2015 - 300017846-02 GTU C 330
8. Troubleshooting
8.3 Incidents and solutions
 The burner is not working:
` Check the boiler thermostat settings.
` Carry out the checks mentioned in the burner instructions.
` Shutdown by the safety thermostat due to accidental
overheating:
• Boiler: Check that the safety thermostat has not triggered. To
restart the boiler, reset the safety thermostat. Remove the safety
thermostat hood and press the reset button with a screwdriver.
• Condenser: Check that the safety thermostat has not triggered:
- Unscrew the protection cap
- Press the resetting button of the burner
` Carry out the start-up operations again. Call your fitter.
` Check the circuit breaker

The burner is operating but the radiators are cold:
` Bleed the radiators.
` Checking the hydraulic pressure. The hydraulic pressure must
be a minimum of 0.8 bars. Adjust the pressure if necessary,
avoiding a sudden influx of cold water into the boiler when it is
hot.
If it is often necessary to top up the installation with water,
contact your fitter.
` Check that the heating pumps are working correctly
` Check the position of the 3 position switch.
B3 control panel: TEST-STB/
.
/
%
on
.
.
DIEMATIC-m3 control panel: AUTO/
!
/TEST STB on
AUTO.
K3 control panel: AUTO/
!
/TEST STB on AUTO
` Check the settings on the boiler thermostat(s).
C001951
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