
Tab.79 List of temporary error codes
Error
code
Message
Description
H00.17
DHW sensor Closed
Domestic Hot Water tank temperature sensor is either shorted or measures a
temperature above range
Check the wiring between the central unit PCB and the sensor.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
H00.32
TOutside Open
Outside temperature sensor is either removed or measures a temperature below range
Check the wiring between the central unit PCB and the sensor.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
H00.33
TOutside Closed
Outside temperature sensor is either shorted or measures a temperature above range
Check the wiring between the central unit PCB and the sensor.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
H00.34
TOutside Missing
Outside temperature sensor was expected but not detected
Check the wiring between the central unit PCB and the sensor.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
H00.47
HP flow sensor removed
or below range
Heat pump flow temperature sensor is either removed or measures a temperature
below range
Check the wiring between the central unit PCB and the sensor.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
H00.48
THp Flow Closed
Heat pump flow temperature sensor is either shorted or measures a temperature
above range
Check the wiring between the central unit PCB and the sensor.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
H00.51
THp Return Open
Heat pump return temperature sensor is either removed or measures a temperature
below range
H00.52
THp Return Closed
Heat pump return temperature sensor is either shorted or measures a temperature
above range
Check the wiring between the central unit PCB and the sensor.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
H00.57
T DHW Top Open
Domestic Hot Water top temperature sensor is either removed or measures a
temperature below range
Check the wiring between the central unit PCB and the sensor.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
H00.58
T DHW Top Closed
Domestic Hot Water top temperature sensor is either shorted or measures a
temperature above range
Check the wiring between the central unit PCB and the sensor.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
11 Troubleshooting
112
7654506 - v06 - 19112019