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7 - USE “E” Code Lock-out description Controls Solutions E11 N TC 1 b o i l e r te m p e r a tu r e Check that the electrical element sensor circuit short-circuited. of the sensor complies with the graph indicated in section 8.17; check the electrical connection cables between the probe and the command board If the electrical element of the probe does not comply, it must be replaced; if the electrical circuit is damaged, it must be repaired; if the previous two cases do not apply, replace the command and control board E12 NTC2 domestic hot water Check that the electrical element temperature sensor circuit of the sensor complies with the short-circuited graph indicated in section 8.17; check the electrical connection cables between the probe and the command board If the electrical element of the probe does not comply, it must be replaced; if the electrical circuit is damaged, it must be repaired; if the previous two cases do not apply, replace the command and control board E13 E14 Erroneous temperature reading. Replace the command and control board Erroneous temperature reading. Replace the command and control board E15 E16 E17 Erroneous temperature reading. Replace the command and control board Erroneous temperature reading. Replace the command and control board NTC3 cold water temperature Check that the electrical element sensor circuit short-circuited of the sensor complies with the graph indicated in section 8.17; check the electrical connection cables between the probe and the command board If the electrical element of the probe does not comply, it must be replaced; if the electrical circuit is damaged, it must be repaired; if the previous two cases do not apply, replace the command and control board E18 NTC6 boiler temperature Check that the electrical element sensor circuit short-circuited of the sensor complies with the graph indicated in section 8.17; check the electrical connection cables between the probe and the command board If the electrical element of the probe does not comply, it must be replaced; if the electrical circuit is damaged, it must be repaired; if the previous two cases do not apply, replace the command and control board E19 E2prom memory damaged Replace the command and control board E20 Flame presence with gas valve closed Replace the gas valve E21 Phase and neutral inverted Invert phase and neutral E22 Mains frequency other than Check the electrical frequency If the mains frequency is other than 50Hz, 50Hz of the system. contact the electricity distribution company; if the mains frequency is 50Hz, replace the command and control board. E23 No earth connection E30 E31 E32 E33 E42 Erroneous temperature reading. Replace the command and control board Erroneous temperature reading. Replace the command and control board Erroneous temperature reading. Replace the command and control board Erroneous temperature reading. Replace the command and control board E50 Boiler TYPE selection error E51 Reset button pressed too often in a short period of time Check the correct earthing of Restore the correct earthing of the system. the system. If the earth correction is already sufficient, replace the command and control board. Programme error or earth Check the correct earthing of Restore the correct earthing of the system. connection insufficient the system. If the earth correction is already sufficient, replace the command and control board. Check the JUMPERS selector If the selector switches are positioned correctswitch as per section 7.5. ly, replace the comand and control board 44
