11 Troubleshooting
11.1 Resetting the safety thermostat
The thermostat is factory-set to 65 °C (average storage temperature). A
thermal safety cut-out is integrated into the safety thermostat. It stops
water from being reheated should accidental overheating occur. Remove
the cause of the overheating and then reset the safety thermostat.
1. Switch off the power supply.
2. Remove the cover.
3. Unclip the temperature adjustment lever to access the reset button.
4. Using a suitable tool, push in the reset button.
11.2 Resolving error codes
If an error occurs, the control panel will display a key and a code The code
is important for the correct and rapid diagnosis of the type of malfunction
and for any technical assistance that may be needed.
1. Make a note of the code displayed.
2. Switch off the appliance.
3. Switch the appliance back on.
The appliance starts up again autonomously when the reason for
the disruption has been cleared.
4. If the error code is displayed again, correct the problem by following
the instructions in the table below.
For more information, see
11.3 List of error codes
Tab.23 Ex-type error codes
Code
Description
Causes and corrective actions
Communication error between the outdoor unit and the
control panel
Check the connection between the outdoor unit and
the control panel.
Replace the control panel if necessary.
Water temperature sensor T5L error
Communication fault: check the connection.
Damaged sensor: replace the sensor.
Evaporation temperature sensor T3 error
Communication fault: check the connection.
Damaged sensor: replace the sensor.
Fig.54
3
4
MW-1001296-1
2
Fig.55
MW
-4
0
0
0
1
8
8
-3
Electrical
Heating
Enter
Timer /
Clock
Opt Mode
Hybrid Mode
11 Troubleshooting
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