Fault Finding - DeDietrich HPI S User Manual

6 Troubleshooting
Tab.26
Code Display text
A00.32 TOutside Open
A00.33 TOutside Closed
A00.34 TOutside Missing
A02.18 OBD Error
A02.37 Uncritic device lost
A10.45 RoomTempZoneA miss
A10.46 RoomTempZoneB miss
A10.47 RoomTempZoneC miss
A10.50 T_DHW top D miss
A10.54 Temp. Zone DHW miss.
A10.56 T_DHW Zone AUX miss
6.2

Fault finding

Tab.27
Problems Probable causes
The radiators are cold. The heating set point tem­
perature is too low.
The heating mode is deac­
tivated.
The radiator valves are
closed.
The heat pump is not op­
erating.
The water pressure is too
low (< 1 bar).
There is no domestic The domestic hot water
hot water. set point temperature is
too low.
The domestic hot water
mode is deactivated.
The appliance is in re­
duced domestic hot water
mode
The shower head is re­
stricting the water flow.
The heat pump is not op­
erating.
The water pressure is too
low (< 1 bar).
Significant variations in Insufficient water supply
domestic hot water
temperature
The domestic hot water
hysteresis is too high
32 MIT-S
Description
Outside temperature sensor is either removed or measures a
temperature below range
Outside temperature sensor is either shorted or measures a
temperature above range
Outside temperature sensor was expected but not detected
Object Dictionary Error:
Uncritical device has been disconnected:
Measure of Room Temperature Zone A is missing
Measure of Room Temperature Zone B is missing
Measure of Room Temperature Zone C is missing
Domestic Hot Water temperature sensor top zone DHW is
missing
Temperature sensor Zone DHW is missing
Domestic Hot Water temperature sensor Zone AUX is missing
Corrections
Increase the value of the room temperature set point or, if a room ther­
mostat is connected, increase the temperature on it.
Activate the heating mode.
Open the valves on all radiators connected to the heating system.
Check that the heat pump is switched on.
Check the fuses and switches on the electrical installation.
Top up the system with water.
Increase the domestic hot water set point temperature.
Activate the domestic hot water mode.
Check and modify the comfort and reduced time ranges for the domes­
tic hot water.
Adapt the domestic hot water set point temperature.
Clean the shower head; replace it if necessary.
Check that the heat pump is switched on.
Check the fuses and switches on the electrical installation.
Top up the installation with water.
Check the water pressure in the installation.
Open the valve.
Contact the professional responsible for maintenance of the heat pump.
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