ICMA S167, Инструкции по сборке, установке и эксплуатации

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ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S167
FI.S167.EN.C - 03/2023
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: +39 02 97249134 - +39 02 97249135 - www.icmaspa.it - sales@icmaspa.it
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PWM feedback signal can provide operation status of the pump, such as power loss or all kinds of alarm/warning
modes.
PWM feedback signal will feed back exclusive alarming information. If the power voltage detects under-voltage signal
values, its output signal will be set to 75%. Provided sundries settlement exists in the hydraulic system and causes
rotor being blocked, the duty cycle of output signal is set to 90%, the alarm will be given higher priority.
The signal can be used to measure power consumption of the pump. The pump signal can be used to detect the
actual operating point of the system rather than measuring by the current controlled by the system. The signal is also
applicable to comparing velocity setting value and feedback.
8.4 PWM Feedback Signal
8.5 How to use the signals
PWM Output Signal
(%)
Pump Status Description
95 Standby (stop) The pump stops
90
Alarm stops, malfunctions (pump
blocked) The pump does not work and will restarts only
after trouble is addressed
85
Alarm stops, electrical
malfunction/trouble The pump does not work and will restarts only
after trouble is addressed
75 Warning
The pump runs, trouble has been detected under
this situation but it is not critical, and the pump
can still work.
0-70 0-70W (slope 1 W/% PWM)