Baxi MK SYSTEM Installation, User And Service Manual page 74

13 Troubleshooting
Code Message
H00.49 THp Flow Missing
H00.51 THp Return Open
H00.52 THp Return Closed
H02.02 Wait Config Number
H02.03 Conf Error
H02.04 Parameter Error
H02.05 CSU CU mismatch
H02.09 Partial block
H02.10 Full Block
H02.36 Funct device lost
H02.37 Uncritic device lost
H02.60 Unsupported function
H06.01 HP Unit Failure
H06.06 BL CompHighPressure
74
Description
Heat pump flow temperature sensor was expected but not detected
Check the wiring between the main PCB and the sensor.
Check that the sensor has been fitted correctly.
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
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 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.
Waiting For Configuration Number
Waiting for configuration parameters to be entered:
Configure CN1 / CN2 depending on the output of the outdoor unit installed (CNF
menu).
Central unit PCB replaced: heat pump not configured.
Configuration Error
The configuration parameters entered are incorrect:
Configure CN1 / CN2 depending on the output of the outdoor unit installed (CNF
menu).
Parameter Error
Restore the factory settings.
If the error is still present: change the central unit PCB.
CSU does not match CU type
Software change (software number or version parameter inconsistent with the mem­
ory).
Partial blocking of the device recognized
BL input on the central unit PCB terminal block open:
Check the contact on the BL input.
Check the wiring.
Check parameters AP001 and AP100.
Full blocking of the device recognized
BL input on the central unit PCB terminal block open:
Check the contact on the BL input.
Check the wiring.
Check parameters AP001 and AP100.
Functional device has been disconnected
No communication between the central unit PCB and the additional circuit PCB:
Check the connection of the power supply cable between the PCBs.
Check the connection of the BUS cable between the PCBs.
Run automatic detection.
Uncritical device has been disconnected
No communication between the central unit PCB and the additional circuit PCB:
Check the connection of the power supply cable between the PCBs.
Check the connection of the BUS cable and the PCBs.
Run automatic detection.
The zone doesn't support the selected function
Heat Pump Unit Failure occured
Error code shown on the digital display of the outdoor unit: E3, E4, H5, H9
A high pressure anomaly has stopped the compressor
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