Code
Display text
Description/Solution
H01.09
Gas Pressure Switch
Gas Pressure Switch:
No flow or insufficient flow:
Check that the gas valve is fully opened
Check the gas supply pressure
Wrong setting on the Gps gas pressure switch:
Check whether the Gps pressure switch is installed correctly
Replace the gas pressure switch (Gps) if necessary
H01.14
Max Tflow
Flow temperature has exceeded the maximum operating value:
Bad connection: check the wiring and connectors.
No flow or insufficient flow:
Check the circulation (direction, pump, valves).
Check the hydraulic pressure.
Check the cleanliness of the heating body.
H01.21
Dhw Temp GradLevel3 Maximum Dhw Temperature Gradient Level3 Exceeded:
Check the circulation (direction, pump, valves)
Check that the heating pump is operating correctly
H02.00
Reset In Progress
Reset In Progress:
No action
H02.02
Wait Config Number
Waiting For Configuration Number:
Reset
and
(see boiler data plate).
H02.03
Conf Error
Configuration Error
H02.04
Parameter Error
Parameter Error:
Parameters are not correct:
Restart the boiler
Reset
and
Replace the control system
H02.05
CSU CU mismatch
CSU does not match CU type:
Reset
and
.
H02.09
Partial block
Partial blocking of the device recognized:
External cause: remove external cause.
Wrong parameter set: check the parameters.
Bad connection: check the connection.
H02.10
Full Block
Full blocking of the device recognized:
External cause: remove external cause.
Wrong parameter set: check the parameters.
Bad connection: check the connection.
H02.12
Release Signal
Release Signal input of the Control Unit from device external environment:
External cause: remove external cause.
Wrong parameter set: check the parameters.
Bad connection: check the connection.
H02.38
No water hardness
No hardness of water
H02.70
HRU test error
External heat recovery unit test failed
H03.00
Parameter Error
Safety parameters level 2, 3, 4 are not correct or missing :
Restart the boiler
Replace the CU-GH-08 control panel
H03.01
CU to GVC data error
No valid data from CU to GVC received:
Restart the boiler
H03.02
Flame loss detected
Measured ionisation current is below limit:
No ionization current:
Vent the gas supply to remove air.
Check whether the gas valve is properly open.
Checking the gas supply pressure.
Check the operation and setting of the gas valve unit.
Check that the air supply and flue gas discharge flues are not blocked.
Check that there is no recirculation of flue gases.
11 Troubleshooting
82
MID _HMI T-control - Gas 120 ACE
7717201 - v03 - 25062019
