SATK22
27
Fault
Indications
Possible Cause of Fault
Operations to be Performed
There is no hot
water flow
DHW led off
possible domestic water system shut-off valves closed
open the valves
no cold water in centralised domestic circuit
call qualified personnel to have it serviced
HIU strainer completely clogged
call qualified personnel to have it serviced
heat exchanger completely blocked
call qualified personnel to have it serviced
The room is not
reaching the desired
temperature
blinking
icon
heating cycle temperature set point too low
increase set point
chrono-thermostat temperature setting incorrect
check programming of chrono-thermostat
HIU strainer clogged
call qualified personnel to have it serviced
primary return temperature limitation intervention
(the following icon appears )
change the return temperature set
point/disable the function
primary flow rate in heating mode set at an excessively
low limit
change heating valve open limit
heating valve actuator faulty
call qualified personnel to have it replaced
heating valve obturator blocked
call qualified personnel to have it replaced
modulating valve actuator connector disconnected
restore correct connection
DHW temperature probe cable inverted with
heating probe
restore correct connection
presence of air in the system
vent the system
pump not working
call qualified personnel to have it replaced
pump cable not connected
restore connection
possible system shut-off valves/terminals closed
open the valves
centralised system temperature insufficient
contact person in charge of system
electronic controller not working
call qualified personnel to have it replaced
primary circuit flow rate insufficient
contact person in charge of system
centralised system not working
contact person in charge of system
thermostat function enabled on the remote interface
when it should be disabled
contact person in charge of system
constant icon
timer/thermostat time setting incorrect
check programming of timer/thermostat
timer/thermostat not working
check timer/thermostat
thermostat function disabled on the remote interface
contact person in charge of system
display off
electric supply switched off
restore HIU electric supply
protection fuse burnt out
call qualified personnel to have it replaced
icon absent
heating not enabled (summer mode)
enable heating by means of heat interface
unit
error code 5 active
heating temperature probe faulty
call qualified personnel to have it replaced
error code 15 active
compensation temperature probe faulty
call qualified personnel to have it replaced
error code 38 active
external temperature probe faulty/ not connected
call qualified personnel to have it replaced
error code 69 active
safety thermostat cut in
call qualified personnel to have it serviced
error code 76 active
thermal safety solenoid valve faulty
call qualified personnel to have it serviced
error code 80 active
no credit
top-up prepayment system
Fault Finding