Gattetti LCA User Manual page 22

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If F2=3 and the condensation probes are of NTC type, when the compressor is being started, the funs operate at the max.
speed for the Fb period, independently of the measured temperature.
F3: Minimum tension threshold for Triac
With fans speed regulation, phase-cut optional board is required. In this case it is necessary to specify the tension
delivered by the Triac to the electrical motor of the fan corresponding to the min. speed. The selected value does not
correspond to the real tension applied, but to an internal variable within the µchiller. See page 60 to find the value of F3.
If either the ON/OFF converter (code CONV0NOFF0) or the PWM/0÷10V converter (code CONV0/10A0) are used we
recommend to set this parameter to "0" and close the jumpers P1 and P6 located in the single compressor board and in
the expansion for control of the second compressor.
F4: Maximum tension threshold for Triac
With fans speed regulation, phase-cut optional board is required. In this case it is necessary to specify the tension
delivered by the Triac to the electrical motor of the fan corresponding to the max. speed. The selected value does not
RG66000889-REV.OO
Example of F2=2 Cooling mode
100
Fan
F5 Temp. Min
"Summer"
Speed
Example of F2=2 Heating mode
100
Fan
F5 Temp. Max
"Winter" Speed
Example of F2=3 Cooling mode
100
Max speed
Min speed
0% F9 F5
Cutoff temperature Summer
Example of F2=3 Heating mode
100%
Max speed
Min speed
F8
T/P max "Winter" speed
T/P condensation
F6 Temp. Max
"Summer"
Speed
T/P condensation
F6 Temp. Min
"Winter" Speed
F6
T/P max "Summer" speed
F7 F9
Cutoff temperature Winter
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