SATK22
21
Safety and Alarms
If the electronic circuit board detects a fault, the display shows
the error code concerned and the symbol .
Heating probe fault (SATK2210 & SATK2220)
Error code: 5
Domestic water probe fault
Error code: 6
Return probe fault
Error code: 15
Return probe fault
Error code: 15
Corrective action
Normal operating conditions are restored automatically once
the faulty probe is working properly again (see page 25 -
“Temperature probe replacement”).
Safety thermostat cut-out (SATK2210)
Error code: 69
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 valve is completely closed.
After the user has removed the block imposed by the safety
thermostat, operation can only be re-enabled when the
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.
Corrective action
To restore the operating mode press the manual
RESET
button.
Heat interface unit disabled
Error code: 80
The HIU is disabled due to an incorrect connection on the
circuit board front terminals or due to an input from an
external device indicating zero credit.
Corrective action
Check the electrical connections or, in the case of zero credit,
top-up the external device/contact the service supplier.
Thermal safety solenoid valve (SATK2210)
Error code: 76
Corrective action
Normal operating conditions are restored automatically once
the faulty safety valve works properly again.
