Error
code
Message Description
H02.23 System flow error System water flow error active
Flow problem
Insufficient flow: open a radiator valve.
The circuit is clogged:
Check that the filters are not obstructed and clean them if necessary.
Clean and flush the installation,
No circulation:
Check that the valves and thermostatic valves are open,
Check that the circulating pump is working,
Check the wiring,
Check the pump supply: if the pump does not work, replace it.
H02.25 ACI error Titan Active System short circuited or on an open circuit
H02.36 Funct device lost Functional device has been disconnected
No communication between the central unit PCB and the additional circuit PCB
H02.37 Uncritic device lost Uncritical device has been disconnected
No communication between the central unit PCB and the additional circuit PCB
H02.60 Unsupported function The zone doesn't support the selected function
H06.01 HP Unit Failure Heat Pump Unit Failure occured
Heat pump outdoor unit fault
9.1.2 Fault codes
If a fault code is still present after several automatic start-up attempts, the
heat pump switches to error mode.
The heat pump will only resume normal operation once the causes of the
fault have been eliminated by the installer.
When one of the following codes is displayed and the heat pump cannot
restart automatically, contact a maintenance technician.
Tab.31 List of fault codes
Error
code
Message Description
E00.00 TFlow Open Flow temperature sensor is either removed or measures a temperature below range
E00.01 Flow temp sensor
shorted or above range
Flow temperature sensor is either shorted or measures a temperature above range
E02.13 Blocking Input Blocking Input of the Control Unit from device external environment
Input BL open.
E02.24 System flow locking
active
System water flow locking active
Insufficient flow: open a radiator valve
The circuit is clogged:
Check that the filters are not obstructed and clean them if necessary.
Clean and flush the installation.
No circulation:
Check that the valves and thermostatic valves are open.
Check that the filters are not obstructed.
Check that the circulating pump is working.
Check the wiring.
Check the pump supply: if the pump does not work, replace it.
9.1.3 Alarm codes
An alarm code is a temporary heat pump status, resulting from the
detection of an anomaly. If an alarm code still remains after several
automatic start-up attempts, the system goes into fault mode.
9 Troubleshooting
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