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11 Troubleshooting
Error
Message
code
H00.33
TOutside Closed
H00.34
TOutside Missing
H00.47
HP flow sensor removed
or below range
H00.48
THp Flow Closed
H00.49
THp Flow Missing
H00.51
THp Return Open
H00.52
THp Return Closed
H00.57
T DHW Top Open
H00.58
T DHW Top Closed
100
MIT-M
Description
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.
Outside temperature sensor was expected but not detected
Check the wiring between the EHC–05 central unit PCB and the sensor.
Check that the outdoor temperature sensor is connected to the EHC–05 PCB.
Check that the sensor has been fitted properly.
Check the Ohmic value of the sensor.
Reset the factory settings for the CN1 and CN2 parameters.
Replace the sensor if necessary.
Activate automatic detection of all the options and accessories.
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.
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.
Heat pump flow 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.
Heat pump return temperature sensor is either removed or measures a temperature
below range
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.
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.
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.
Important
This solution also resets
all the other parameters.
7756241 - v02 - 19062020
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