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Code
Description
936
Floor thermostat 1 error
937
No circulation error
938
Anode fault
940
Hydraulic scheme not defined
955
Water flow check error
970
Undefined split / mono config.
2P2
Thermal cleanse not complete
2P3
DHW setpoint not reached in boost
2P4
Electr. heater thermos. (manual)
2P5
Electr. heater thermostat (auto)
2P7
Precirculation error
2P8
Low pressure warning
2P9
SG ready input config. err.
Check the flow of the under-floor system. Check the connection of the
thermostat on the IN-AUX2 STE terminal of the Energy Manager and/or STT of
the TDM. If the thermostat of the under-floor system is not present, apply an
electrical jumper to terminal IN-AUX2 STE of the Energy Manager and/or STT
Check that the main circuit has activated
Check the connection of the anode
Check whether there is any water in the indirect cylinder
Check the condition of the anode
Check the configuration of parameter 1.2.6
Hydraulic diagram not selected through parameter 1.1.0
Check the connection of the flow and return temperature sensors
Check the configuration of parameter 1.2.5
Sanitisation temperature not reached in 6 h:
Check the drawing of domestic hot water during the thermal sanitisation
Check the activation of the heating element
Domestic hot water set-point temperature not reached during the boost
Check the drawing of domestic hot water during the DHW boost cycle
Check the activation of the heating element
Check the activation of the main circulation pump
Check the flow with the reading of the flow meter through parameter 13.9.3
Check the condition of the safety thermostat and of the cabling
Check the activation of the main circulation pump
Check the flow with the reading of the flow meter through parameter 13.9.3
Check the condition of the safety thermostat and of the cabling
Check the connection of the flow meter
Run an automatic deaeration cycle 1.12.0
Check for any water leakages in the hydraulic circuit
Defective cabling of the pressure switch. Check the connection of the pres-
sure switch and replace it, if necessary.
Only one of the parameters 1.1.0 or 1.1.1 is set as an SG Ready input
Resolution
of the TDM.
cycle
cycle
Faulty pressure switch
Service
81 / EN
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