FRIGOMAR ENG - CU50VFD-CU70VFD 20190108.doc81218 Page 13 of 24
All the following operation parameters are continuously checked:
Discharge compressor gas temperature
(analogical input AI-7).
Suction compressor gas temperature
(analogical input AI-8).
Evaporation gas temperature
(analogical input AI-1).
Circulation water inlet temperature
(analogical input AI-4).
Circulation water outlet temperature
(analogical input AI-3).
Seawater condenser inlet
(analogical input AI-6).
Seawater condenser outlet
(analogical input AI-5).
Suction compressor gas pressure
(analogical input RL-4).
Circulation fan coils water flow
(digital input DI-3).
Gas discharge pressure
(digital input DI-1).
Gas suction pressure
(digital input DI-2).
Driver SSPM temperature
(analogical input SSPM).
Through the parameters analysis and by algorithms the controller manages the operation in cooling
and heating mode.
Abnormal operations (values out from the defined ranges) are immediately detected and displayed,
and the unit modifies the operation or stops working under defined conditions. It is possible to verify
and
reset
the alarm from the display panel.
4.2 DIGITAL DISPLAY CONTROL PANEL
Home page:
Reading values in real time:
fresh water inlet temperature (e.g. 12,0 °C, or 53.6 F if selected imperial unit);
fresh water outlet temperature (e.g. 7,0°C or 44.6 F);
compressor real frequency (e.g. 63 Hz).
Displaying status:
SEA (seawater pump) lightened if seawater pump ON;
FANCOIL (fresh water pump) lightened if circulation pump ON;
Alarm active if alarm symbol is lightened;
Date and time.
