SATK20 & SATK30
8
Compensation probe fault - Error code: 15
SATK20103 - LOW temperature
SATK30103 - at LOW temperature setting
Domestic water probe fault - Error code: 6
Safety thermostat cutout - Error code: 69
SATK20103 - LOW temperature
SATK30103 - at LOW temperature setting
Removing a fault
Once the correct pressure has been achieved on the heating
circuit, the fault can be reset. (see page 7).
Probe fault
If the domestic water temperature probe fails, domestic water
generation will cease immediately. Heating performance will
not be affected.
If the heating probe fails, the heating will cease immediately.
The domestic water generation will not be affected. The probe
fault is indicated by a flashing fault LED on the electronic
controller.
Heating probe fault - Error code: 5
After the user has reset the isolation 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
Before resetting the controller, the manual
reset button will need to be pressed.
Safety valve fault - Error code: 76
SATK20103 - LOW temperature
Removing a fault
Normal operating conditions are restored automatically once
the faulty safety valve is working correctly again.
Safety setting incorrect - Error code: 76
Removing a fault
Normal operation will be restored once the probe is replaced.
(see page 15).
Removing a fault
Restore correct switch setting according to Table 1
Automatic controller function
Rese t mixing/modulating valve to zero
Immediately after the power supply has been switched on,
the position of the 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.
The HIU is configured to support low temperature heating
(low temperature models only), constantly monitors the
heating flow temperature and includes a safety thermostat.
If the thermostat is activated during a general cycle, the
circulation pump will immediately stop, the mixing valve and
safety lock valve (SATK20103) will close. Safety thermostat
activation is indicated by a steady, red fault LED on the
electronic controller. This fault locks all functions.
In the event of a power failure, the thermal safety valve
prevents hot water for heating purposes from entering the
system.
15
5
6
76
79
69
