hajdu HP-TOWER HPT300 Manuel De Mise En Service, D'opération Et D'entretien page 77

If the time has not been previously set, this must be done in advance as follows:
OFF-PEAK (controlled power)
This mode is not available, unless the appliance has been properly connected to "low
tariff" controlled power or night time controlled power. (In Hungary, this is heat pump
electricity.) In this connection module, the Program mode is unavailable, it cannot be
used.
Controlled power search can be activated by either pressing and holding down the OK
button, or enabling the I3 setting. (For more details, see the chapter For Installation
Technicians.)
77