8 Troubleshooting
8.1
Error messages
Resetting the control panel allows the appliance to be restarted.
The message
appears when a fault code is detected. After resolving
the problem, pressing the
key resets the appliance's functions and
thus eradicates the fault.
If several faults occur, they are displayed one after the other.
1. Reset the control panel by pressing the
key for 3 seconds,
when an error message is displayed.
In economy mode, the appliance will not run a domestic hot water
heating cycle after a central heating cycle.
2. Display the current operating status by briefly pressing the
key.
8.1.1
Error codes
An error code is a temporary status, resulting from the detection of a boiler
anomaly. The control panel attempts automatic restart of the boiler until it
ignites.
An error code is a temporary status, resulting from the detection of a heat
pump anomaly. The control panel attempts automatic restart of the heat
pump until it switches on.
When one of the following codes is displayed and the boiler cannot restart
automatically, contact a competent and qualified person.
When one of the following codes is displayed and the heat pump cannot
restart automatically, contact a maintenance technician.
Tab.33 List of temporary error codes
Error code Message
Description
H00.00
SENS T FLOW OPEN
Boiler flow sensor in open circuit
Heat pump flow sensor defective
H00.01
SENS T FLOW CLOSED Hybrid system flow sensor defective
H00.06
SENS T RETURN
MISSING
SENS T RETURN
CLOSED
Return sensor not connected
H00.16
SENS DHW OPEN
Domestic hot water sensor not connected
H00.17
SENS DHW CLOSED
Domestic hot water sensor not connected
H00.32
SENS T OUTSIDE
OPEN
Outside temperature sensor defective or not connected
H00.33
SENS T OUTSIDE
CLOSED
Outside temperature sensor defective or not connected
H00.40
SENS WATPRESSURE
OPEN
Water pressure sensor defective, short-circuited or in open circuit
H00.41
SENS WATPRESSURE
CLOSED
Water pressure sensor defective, short-circuited or in open circuit
H00.47
SENS HP FLOW OPEN Heat pump flow temperature sensor defective
H00.48
SENS HP FLOW
CLOSED
Heat pump flow temperature sensor defective
H00.51
SENS HP RETURN
OPEN
Heat pump return temperature sensor defective
H00.52
SENS HP RETURN
CLOSED
Heat pump return temperature sensor defective
H00.57
SENS DHW TOP OPEN Top domestic hot water temperature sensor defective
H00.58
SENS DHW TOP
CLOSED
Top domestic hot water temperature sensor defective
Fig.54
MW
-5
0
0
0
0
6
1
-3
Fig.55
MW-5000060-3
8 Troubleshooting
50
200 ESL HYBRID
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