Hamworthy Purewell VariHeat 65he Installation, Comissioning And Servicing Instructions page 39

8.3.8 - Start-up / initialisation
On startup after power-On, or after a lockout reset, the setpoints will be initialized.
These setpoints apply until a first adjustment is made (e.g. via the display or PC parameterization):
After a readjustment, these values will be overwritten with the new value and permanently stored in the LMU.
When a new startup is made, or after power-On, the previous settings will be stored in the LMU.
Also, the software version number of the operator module and that of the connected type of LMU... will be deliv-
ered to the display.
8.3.9 - Maintenance Functions
8.3.9.3 - Error code display (LMU6.. version 2.08)
In the event of a nonvolatile LMU... lockout position, fault is continually displayed. In addition, the diagnostic code
on the display flashes (refer to figure 8.3.9).
To cancel the lockout position, press lockout reset button 10 for at least 2 seconds.
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HAMWORTHY HEATING LTD PUREWELL VariHeat he 500001170/K