RG66000889-REV.OO 22
Example of F2=2 Cooling mode
Example of F2=2 Heating mode
Example of F2=3 Cooling mode
Example of F2=3 Heating mode
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
Fan
100
F5 Temp. Min
“Summer”
Speed
F6 Temp. Max
“Summer”
Speed
T/P condensation
Fan
100
F5 Temp. Max
“Winter” Speed
F6 Temp. Min
“Winter” Speed
T/P condensation
100%
0% F8 F7 F9
T/P max “Winter” speed Cutoff temperature Winter
Max speed
Min speed
100
0% F9 F5 F6
Cutoff temperature Summer T/P max “Summer” speed
Max speed
Min speed
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