11 Troubleshooting
11.1 Displaying and clearing the error memory
The error memory stores the 32 most recent errors. You can check the
details of each error and then clear it from the error memory.
To display and clear the error memory:
1. Press the key.
2. Select Error History.
The list of the 32 most recent errors is displayed with the error code,
a short description and the date.
3. Carry out the following actions according to your needs:
Show the details of an error: select the desired error.
To clear the error memory, press and hold the rotary knob.
11.2 Error codes
If an error occurs, the control panel displays a message and a
corresponding code.
The control panel status LED flashes and/or is displayed in red.
The control panel can display three types of error codes:
Type of code
Description
Colour of the error icon
Axx.xx codes
Warning
Grey
Hxx.xx codes
Blockage
Red
Exx.xx codes
Lock out
Red + red flashing screen
1. Make a note of the code displayed. The code is important for the
correct and rapid diagnosis of the type of malfunction and for any
technical assistance that may be needed.
2. Switch the boiler off and switch it back on.
3. The boiler starts up again automatically when the cause of the error
has been removed.
If the code is displayed again, correct the problem by following the
instructions in the tables below.
11.2.1 Warning
If it is anticipated that a situation may develop into a fault, a warning will
first be given for some malfunctions. The error code is displayed in the
main display and the LED for status indication flashes green.
Press the key to remove the warning from the main display.
CU-GH-08 alarm codes
Tab.69
Code
Display text
Description/Solution
A00.34
TOutside Missing
Outside temperature sensor was expected but not detected
A00.42
WaterPressureMissing Water pressure sensor was expected but not detected:
Water pressure sensor is not connected: connect the sensor
Water pressure sensor is not connected correctly: connect the sensor correctly
A02.06
Water Press Warning
Water Pressure Warning active:
Water pressure too low; check the water pressure.
A02.18
OBD Error
Object Dictionary Error :
Reset
and
On
11 Troubleshooting
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MID _HMI T-control - Gas 120 ACE
7717201 - v03 - 25062019
