7
Safety thermostat cut-out
SATK20103HE - LOW temperature
Error code 69
The HIUs configured to support low temperature heating
continuously monitor the safety thermostat controlling the flow
temperature.
If the safety thermostat is activated during a general cycle, the
heating circulation pump immediately comes to a stop and the
modulating/mixing valve is completely closed. The thermal safety
lock valve (SATK20103HE) is closed.
In the event of a power failure, the thermal safety valve prevents hot
water from entering the heating system.
After the user has reset the block imposed by the safety thermostat,
the shut-off valve can only be re-enabled when the
mixing/modulating valves are completely closed again.
This means that if a domestic water cycle is in progress, the
activation of the shut-off valve will be postponed until the end of that
domestic water cycle.
Removing a fault
To restore the operating mode press the manual
RESET button.
Safety and alarms
Error codes associated with faults signalled by illumination of the
FAULT LED are also shown on the display.
69
Removing a fault
Normal operating conditions are restored automatically once the
faulty safety valve is working properly again.
Thermal safety valve fault
SATK20103HE - LOW temperature
Error code 76
76
Removing a fault
Normal operating conditions are restored automatically once the
faulty probe is working properly again (see page 12).
Probe fault
If a temperature probe fails, the associated cycle will be stopped
immediately and disabled.
Any requests to run cycles not associated to the previous one will
continue to run normally.
Heating probe fault
Error code: 5
5
Domestic hot water probe fault
Error code: 6
6
Compensation probe fault
SATK20103HE - SATK20203HE
Error code: 15
Automatic controller functions
Reset mixing/modulating valve to zero
Immediately after the power supply has been switched on, the
position of the installed mixing/modulating valves is reset to zero.
Pump anti-clog
When the pump is not in use, it is powered on for a period of
5 seconds every 24 hours.
Mixing valve/modulating valve anti-clog
The anti-clogging cycle for the mixing/modulating valve is run every
24 hours.
Removing a fault
Restore correct switch setting according to table 1
(page 6).
Incorrect switch setting
Error code 79
79
Removing a fault
The heat interface unit is disabled due to incorrect setting of the
dip-switches. Restore correct setting according to table 1
(page 6).
Incorrect dip-switch configuration (heat interface unit disabled)
Error code 80
80
