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Safety and alarms

Safety thermostat cut-out 
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.

If  the  electronic  circuit  board  detects  a  fault,  the  display  shows  the
error code concerned and the symbol 

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Corrective action

Normal operating conditions are restored automatically once the faulty
probe is working properly again (see page 20 - “Temperature probe
replacement”).

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 flow probe fault 
Error code: 5

Domestic hot water probe fault 
Error code: 6

Return probe fault
Error code: 15

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.                                 

Heat interface unit disabled
Error code 80

Heating circuit pressure switch fault 
Error code 4

The  electronic  regulator  continuously  monitors  the  status  of  the
pressure  switch  controlling  the  water  pressure  in  the  heating  circuit.
If the pressure switch trips, the heating circulation pump immediately
comes  to  a  stop  and  the  modulating  valve  is  completely  closed.
This fault implies the stoppage of the heating cycle only.                    
Domestic water drawing requests will continue to be served normally.

N.B.

:  A  low  pre-charge  value  of  the  expansion  vessel  can  cause  a

pressure switch fault.

Corrective action

Return  to  the  operating  mode  is  subordinate  to  restoration  of  the
correct water pressure in the secondary heating circuit (see page 9 -
“Filling the user system”).

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

External temperature fault
Error code: 38

 

 

 

     

 

 

 

 

 

 

   

 

 

   

 

 

 

 

Summary of Contents for SATK32 Series

Page 1: ...de 10 Commissioning 9 Electrical installation 8 Hydraulic installation 5 Hydraulic components and diagram 4 Dimensions Technical specifications 3 Safety instructions 2 DHW function Comfort functions P...

Page 2: ...k must be carried out on the device cut off the electric supply first Do not use devices with automatic or time reset or which may be reset accidentally 4 Use suitable automatic protection devices in...

Page 3: ...nimum flow rate to activate domestic water flow meter 2 l min 0 3 Electric supply 230 V ac 10 50Hz Max power consumption 80 W Protection class IP 40 Pump UPM3 15 70 Actuators 24 V stepper motor Probes...

Page 4: ...be 10 Pressure gauge 11 Safety thermostat 12 130 mm heat meter template 13 1 4 F pressure test port 14 Connection for M10x1 heat meter return probe 15 Primary drain cock 16 Connection for M10x1 heat m...

Page 5: ...kflow preventer code 572120 proceed as follows remove the nuts shown in the figure with letter A Hydraulic installation Preliminary operations installation without template After having established th...

Page 6: ...tem in order to remove any residue or impurities that could endanger correct operation of the HIU In order to facilitate these operations a manual bypass flushing valve is available code 789110 N B In...

Page 7: ...pipe To tighten the nuts apply maximum tightening torque of 25 Nm taking account of the indications of the heat meter manufacturer install the flow probe in the M10 pocket B Please refer to the heat m...

Page 8: ...directed toward the exterior of the HIU using the pathways provided in the insulation and on the frame All the low voltage lines must be routed through a single dedicated cable raceway using the path...

Page 9: ...necessary restore the pre charge value shown in the technical specifications Filling the user system SATK32 series HIU can be fitted with a charging unit equipped with a backflow preventer F check va...

Page 10: ...ng modes OFF DHW only summer mode Heating DHW winter mode Heating only Selecting set points current time and comfort function Press the set key repeatedly to set the current time set point temperature...

Page 11: ...arious parameters which can then be edited pressing and rotating knob R Technical parameter t00 Primary limit set return temperature in heating mode Primary limit set return temperature in DHW mode Co...

Page 12: ...ng To set the flow temperature press the SET key until the symbol in the red circle appears for the return temperature limit press the key until the symbols in the green circle are displayed Use the R...

Page 13: ...7 1 freezes the operating set points to prevent inadvertent modifications by the user The comfort function can be alternatively preheating of the DHW plate heat exchanger or management of DHW recircul...

Page 14: ...posed by controlling the maximum opening of the primary circuit modulating valve Since latter is controlled by a differential pressure limiter it is possible to supply direct correspondence between th...

Page 15: ...es a sequence of LEDs showing the instantaneous power consumption 1 yellow LED lit power between 0 and 25 of Pmax 2 yellow LEDs lit power between 25 and 50 of Pmax 3 yellow LEDs lit power between 50 a...

Page 16: ...must be set to 1 2 4 7 This value t05 7 is set by default example 2 Distinction of consumption for DHW production from total consumption in combination with heat meter equipped with dedicated function...

Page 17: ...ire twisted cable Compliance with this requirement becomes even more significant the more extensive the RS 485 network If alternatively a shielded wire is used the shield must be connected solely on t...

Page 18: ...nd disabled Any requests to run cycles not associated to the previous one will continue to run normally Heating flow probe fault Error code 5 Domestic hot water probe fault Error code 6 Return probe f...

Page 19: ...o be interfaced with controllers managing the heating and DHW production services by means of pre paid type logic The HIU interprets an open contact as credit available Closing the contact disables th...

Page 20: ...ween 0 9 and 1 2 bar Restore the pressure value if necessary Re open the shut off valves and restore secondary circuit pressure to a value between 1 3 and 1 7 bar Check for the absence of any liquid d...

Page 21: ...tuator see previous paragraph Extract the obturator unscrewing the locking nut F Replace the obturator screw on the locking nut F and then fit the actuator Insert the fixing clip respecting the correc...

Page 22: ...r partly clogged call qualified personnel to have it serviced modulating valve actuator faulty call qualified personnel to have it replaced DHW temperature probe cable inverted with heating probe rest...

Page 23: ...in charge of system electronic regulator not working call qualified personnel to have it replaced primary circuit flow rate insufficient contact person in charge of system centralised system not work...

Page 24: ...s external sensor prepayment auxilliary microswitch Modbus if required been carried out 15 Has the remote user interface been configured for installation on board thermostat function disabled inside t...

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