Baxi MK SYSTEM Installation, User And Service Manual page 77

Code Message
H06.37 Overheat protection
H06.38 ODU pressure
H06.39 ODU overcurrent
H06.40 ODU current sensor
H06.41 ODU Tinl water
H06.42 ODU refrigerant
H06.43 DIP switch
H06.53 Tambiant air minimum
H06.58 HP outdoor temp
H06.59 HP suction temp
H06.60 HP inverter voltage
H06.61 HP supply voltage
H06.62 HP discharge temp
H06.63 HP EEPROM error
7856310 - v02 - 21122023
Description
The outdoor unit overheat protection is activated
The outdoor unit pressure is anomalous
Compressor overcurrent in the outdoor unit
Error code shown on the digital display of the outdoor unit: P3
See possible causes and action list for code H06.24.
The power supply voltage of the unit is low. Increase the power voltage to the re­
quired range.
Current sensor error in the outdoor unit
The outdoor unit inlet water temperature is anomalous
Outdoor unit refrigerant is anomalous
The DIP switch on the interface board has a configuration error
interface panel = EHC-14 PCB
The ambient air temperature is below the allowed minimum
Heat pump outdoor temperature sensor error
Error code shown on the digital display of the outdoor unit: E6
Heat pump compressor suction temperature sensor error
Error code shown on the digital display of the outdoor unit: E9
The connector of sensor Th is loose. Reconnect it.
The connector of temperature sensor Th is wet or contains water. Drain the water,
dry the connector and add waterproof adhesive.
The temperature sensor Th is faulty. Replace it.
The inverter voltage of the heat pump is too low
Error code shown on the digital display of the outdoor unit: F1
Check the power supply.
If the power supply is correct, check that the LED indicator light is ok. Check the PN
voltage: if it is 380 V, the source of the problem is generally the motherboard. If the
indicator light is off, switch off the power supply, check the IGBT, check the dioxides,
if the voltage is not correct, the inverter board is damaged, replace it.
If there is no problem with the IGBT, this means that there are no problems with the
inverter board. Check the bridge rectifier to see if the bridge voltage is correct.
(Same method as for the IGBT, disconnect the power supply, check if the dioxides
are damaged.
normally, if F1 is present when the compressor is started up, the motherboard could
be the problem. If F1 is present when the fan is started up, this could be due to the
inverter board.
The heat pump power supply voltage is out of range
Error code shown on the digital display of the outdoor unit: H7
Check that the power supply input is in the available range.
Switch off and on again several times in quick succession. The unit should remain
off for more than 3 minutes before being switched back on.
The part in the circuit on the main control board is faulty. Replace it with a new main
PCB.
Heat pump compressor discharge temperature sensor error
Error code shown on the digital display of the outdoor unit: EA
See possible causes and action list for code H06.24.
The temperature sensor TWout is loose. Reconnect it.
The temperature sensor T1 is loose. Reconnect it.
The temperature sensor T5 is loose. Reconnect it.
Heat pump Inverter module EEPROM error
Error code shown on the digital display of the outdoor unit: HF
Error in the EEprom parameter, rewrite EEprom data.
The part in the EEprom chip is broken, replace it.
The main PCB is broken, replace it.
13 Troubleshooting
77