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Particular operations
8.2
The product has a fan speed control system that
increases the speed of the same, when the ambient
temperature drops to below -1°C, at higher
temperatures, the fan maintains a lower speed in order
to reducing the noise of the equipment.
The equipment is also provided with a verification
system of the environmental conditions concerning the
temperatures of the external incoming air. The below
described function is necessary to avoid the equipment
working with the heat pump mode out of specification,
which may cause faults to the compressor and the
consequent interruption of the functionality.
By every start, the fan is activated for a time set up by
parameter C12 corresponding to 1 minute. After this
time, the system measures the incoming air
temperature. If the temperature is equal to or lower than
parameter SP9 (-7°C), then the conditions for the
activation of the heat pump unit are not met, therefore
the electric resistance is activated. The heating-up
process continues with the help of the electrical
resistance until the set point established with the
ongoing active cycle is reached.
The system verifies cyclically (every 120 minutes) the
environmental conditions and activates the heat pump
mode only when these conditions are adequate for its
operation.
Page 30
Installation and user manual
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