RG66000889-REV.OO 8
Forcing a DEFROSTING CYCLE (only Air/Water Heat Pumps)
To force a defrosting cycle press the SEL and
buttons for more than 5 seconds (if the temperature/pressure values of
the outdoor exchanger are lower than the values set for the end of defrosting). In units with 2 Circuits the defrosting cycles
will be simultaneous.
Enabling/disabling of COOLING operating mode
The cooling operating mode can be enabled/disabled by pressing the button (in panel-mounted versions) for more than
5 s (see, if necessary, the param. P6). It is not possible to directly pass from the heating to the cooling operating mode: if the
unit is actually operating in the heating mode, pressing the
UP button will not swap the current mode.
Enabling/disabling of HEATING operating mode
The Heating operating mode can be enabled/disabled by pressing the button (in panel-mounted versions) for more than
5 seconds (see, if necessary, the parameter P6). It is not possible to directly pass from the Cooling to the Heating operating
mode: if the unit is actually operating in the Cooling mode, pressing the UP button will not swap the current mode; it is
necessary to inhibit the Cooling mode.
Stand-by
To turn off the unit, deactivate the current operating mode (Cooling or Heating). When the µchiller is turned off, it maintains
the 4-way valves in the previous position for a period equal to the parameter c8 (pump OFF delay after the compressor is
OFF).
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