Error
code
Message
Description
H02.04
Parameter Error
Parameter Error
Restore the factory settings.
If the error is still present: change the central unit PCB.
H02.05
CSU CU mismatch
CSU does not match CU type
Software change (software number or version parameter inconsistent with the mem
ory).
H02.07
Water Press Error
Water Pressure Error active
Check the hydraulic pressure in the heating circuit.
Check the wiring between the central unit PCB and the pressure sensor.
Check the connection of the pressure sensor.
H02.09
Partial block
Partial blocking of the device recognized
BL input on the central unit PCB terminal block open
Check the contact on the BL input.
Check the wiring.
Check the AP001 and AP100. parameters.
H02.10
Full Block
Full blocking of the device recognized
BL input on the central unit PCB terminal block open
Check the contact on the BL. input.
Check the wiring.
Check the AP001 and AP100. parameters.
H02.23
System flow error
System water flow error active
Flow problem
No circulation:
Check that the circulation pump is working,
Check that the valves and thermostatic valves are open,
Check the wiring,
Check the pump supply: if the pump does not work, replace it.
Too much air: completely vent the indoor module and the installation for optimum run
ning.
Incorrect wiring: check the electrical connections.
Flow meter:
Check the electrical connections and the direction of the flow meter (arrow to the
right).
Replace the flow meter if necessary
H02.25
ACI error
Titan Active System short circuited or on an open circuit
Check the connection cable.
Check that the anode has not short-circuited and is not broken.
H02.36
Funct device lost
Functional device has been disconnected
No communication between the central unit PCB and the additional circuit PCB
Check the connection of the supply cable between the PCBs.
Check the connection of the BUS cable between the PCBs.
Run automatic detection.
H02.37
Uncritic device lost
Uncritical device has been disconnected
No communication between the central unit PCB and the additional circuit PCB
Check the connection of the supply cable between the PCBs.
Check the connection of the BUS cable and the PCBs.
Run automatic detection.
H02.60
Unsupported function
The zone doesn't support the selected function
12 Troubleshooting
7685645 - v04 - 07032018
AWHP-2 iMPI
109