8 Troubleshooting
8.1 Error codes
8.1.1 Error codes on the PCB EHC-02
An A.xx.xx or H.xx.xx error code corresponds to a temporary status of the
hybrid heat pump after a fault is detected. If an error code remains after
several automatic start-up attempts, the hybrid heat pump switches to fail
ure mode. Failure mode is indicated by a E.xx.xx type fault code. The hy
brid heat pump only restarts once the fault is resolved.
Note
An error code is linked to a PCB. If an error code is displayed,
check which PCB is affected.
Tab.27 List of alarm codes
Error code Message
Description
A.02.06
WATPRESSURE
WARNING
Water pressure in the installation lower than the minimum pressure
A.02.22
SYSTEM FLOW
WARNING
Flow rate in the installation lower than the minimum flow rate
When one of the error codes below is displayed, contact the professional
responsible for maintenance of the heat pump.
Tab.28 List of error codes
Code
Message
Description
H.00.00
SENS T FLOW OPEN
Hybrid heat pump flow sensor defective
H.00.01
SENS T FLOW CLOSED
Hybrid heat pump flow sensor defective
H.00.16
SENS DHW OPEN
Bottom domestic hot water temperature sensor defective
H.00.17
SENS DHW CLOSED
Bottom domestic hot water temperature sensor defective
H.00.32
SENS T OUTSIDE OPEN
Outside temperature sensor defective
H.00.33
SENS T OUTSIDE CLOSED
Outside temperature sensor defective
H.00.40
SENS WATPRESSURE OPENS
Error on the water pressure sensor
H.00.41
SENS WATPRESSURE
CLOSEDS
Error on the water pressure sensor
H.00.47
SENS HP FLOW OPEN
Heat pump flow temperature sensor defective
H.00.48
SENS HP FLOW CLOSED
Heat pump flow temperature sensor defective
H.00.51
SENS HP RETURN OPEN
Heat pump return temperature sensor defective
H.00.52
SENS HP RETURN CLOSED
Heat pump return temperature sensor defective
H.00.57
SENS DHW TOP OPEN
Top domestic hot water temperature sensor defective
H.00.58
SENS DHW TOP CLOSED
Top domestic hot water temperature sensor defective
H.02.00
RESET IN PROGRESS
Reset under way
H.02.02
WAITING FOR CONFIGURATION
NUMBER
The heat pump is not configured
H.02.03
CONFIGURATION ERROR
The heat pump is not configured
H.02.04
PARAMETER ERROR
Incorrect parameter configuration
H.02.05
PSU
Internal error
H.02.07
WATPRESSURE ERROR
Insufficient water pressure
Check that the hydraulic pressure in the heating circuit is sufficient
H.02.09
PARTIAL BLOCK
The BL input on the terminal block in the EHC-02 PCB is open
H.02.10
FULL BLOCK
The BL input on the terminal block in the EHC-02 PCB is open
8 Troubleshooting
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