DeDietrich 24 Installation And Service Manual page 207

DISPLAY
DESCRIPTION OF PERMANENT FAULTS (RESET)
Group Specific
code code
E.04 .13 Fan blade blocked or maximum rpm exceeded
E.04 .17 Fault in gas valve control circuit
The flow temperature is below the minimum tempera­
E.04 .18
ture or the flow temperature sensor is not connected
E.04 .23 Communication internal stoppage
E.04 .29 Communication internal stoppage
E.04 .254 Fault in gas valve control circuit
Tab.123 List of warnings
DISPLAY
DESCRIPTION OF WARNINGS BEFORE A FAULT
Group Specific
IS DETECTED
code code
Solar temperature sensor is either removed or
A.00 .28
measures a temperature below range
Solar temperature sensor is either shorted or
A.00 .29
measures a temperature above range
Outdoor temperature sensor expected but not detec­
A.00 .34
ted
A.02 .06 Low pressure in heating circuit
A.02 .36 Functional device disconnected
A.02 .37 Passive functional device disconnected
A.02 .45 Connection error
A.02 .46 Device priority error
A.02 .48 Unit function configuration error
A.02 .49 Failed node initialisation
A.02 .54 Open Therm bus power supply error
A.02 .55 Incorrect or missing serial number
Internal memory reserved for full customisation of set­
A.02 .76 tings.
No further changes can be made
7804841 - 02 - 20012022
CAUSE – Check/Solution
An installer is required for most checks and solu­
tions.
FAN/PCB PROBLEM
Check the PCB-fan connection
Check the fan operation
MAIN PCB ERROR
Check the electrical connections for the gas valve
SENSOR/CONNECTION PROBLEM
Check the sensor/PCB connection
Check the operation of the sensor
Switch the power supply off and on again and
then RESET
Switch the power supply off and on again and
then RESET
MAIN PCB ERROR
Check the electrical connections
CAUSE – Check/Solution
Check the solar temperature sensor wiring. Re­
place the sensor if necessary. In case of removal
of the solar tank, set the parameter DP150=1.
Check the solar temperature sensor wiring. Re­
place the sensor if necessary.
OUTDOOR SENSOR NOT DETECTED
Enter the correct value of the parameter AP091
Connect the outdoor sensor
Outdoor sensor is not connected correctly
Check the installation pressure and restore
Check the expansion vessel pressure
Check for boiler/installation leaks
COMMUNICATION FAULT
Start the auto-detect function (parameter AD)
Check the devices connected to contact X9
COMMUNICATION FAULT
Start the auto-detect function (parameter AD)
Check the devices connected to contact X9
COMMUNICATION FAULT
Start the auto-detect function (parameter AD))
COMMUNICATION FAULT
Start the auto-detect function (parameter AD))
ELECTRICAL CONNECTION ERROR
Start the auto-detect function (parameter AD))
Check electrical connections of external devices
ELECTRICAL CONNECTION ERROR
Start the auto-detect function (parameter AD))
Check electrical connections of external devices
Check the devices connected to contact X17 -
Terminal board M2 (7-8)
Contact a qualified professional
Contact a qualified professional
en
11 Troubleshooting
INIDENS 207