9 Troubleshooting
9.1
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.
9.1.1
Error codes
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 heat pump cannot
restart automatically, contact a maintenance technician.
Tab.30 List of temporary error codes
Error
code
Message
Description
H00.17
DHW sensor Closed
Domestic Hot Water tank temperature sensor is either shorted or measures a
temperature above range
H00.32
TOutside Open
Outside temperature sensor is either removed or measures a temperature below range
H00.33
TOutside Closed
Outside temperature sensor is either shorted or measures a temperature above range
H00.47
HP flow sensor removed
or below range
Heat pump flow temperature sensor is either removed or measures a temperature
below range
H00.48
THp Flow Closed
Heat pump flow temperature sensor is either shorted or measures a temperature
above range
H00.51
THp Return Open
Heat pump return temperature sensor is either removed or measures a temperature
below range
H00.52
THp Return Closed
Heat pump return temperature sensor is either shorted or measures a temperature
above range
H00.57
T DHW Top Open
Domestic Hot Water top temperature sensor is either removed or measures a
temperature below range
H00.58
T DHW Top Closed
Domestic Hot Water top temperature sensor is either shorted or measures a
temperature above range
H02.00
Reset In Progress
Reset In Progress
H02.02
Wait Config Number
Waiting For Configuration Number
H02.03
Conf Error
Configuration Error
H02.04
Parameter Error
Parameter Error
H02.05
CSU CU mismatch
CSU does not match CU type
H02.07
Water Press Error
Water Pressure Error active
Check the hydraulic pressure in the heating circuit.
H02.09
Partial block
Partial blocking of the device recognized
BL input on the central unit PCB terminal block open
H02.10
Full Block
Full blocking of the device recognized
BL input on the central unit PCB terminal block open
Fig.47
MW
-5
0
0
0
0
6
1
-3
Fig.48
MW-5000060-3
9 Troubleshooting
44
iMPI V200
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