VERDER CARBOLITE GERO LHT 5/120 Installation, Operation And Maintenance Instructions page 19

6.0 Maintenance
In some cases the supply voltage may be outside the range 220-240 V or the 3-phase
equivalent, the power limit parameter may be set to a value other than 100%. Do not
increase the value to 100%, see section 10.0 for details of power limit settings.
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