EN/07.2013/58/51
• COOLING: in this menu it’s possible to control the state of cooling mode, the temperature control rules are bypassed
and compressor is forced on.
ON: CP on, VE = 100% ; VC = 100% (UP key) / OFF: the cooling has an automatic control (DOWN key)
• HEATING: in this menu it’s possible to control the state of heating, the temperature control rules are bypassed and
resistor is forced on.
ON: Heating element on, VE = 100% ; VC = 0% (UP key) / OFF: the heating has an automatic control (DOWN key)
• FREECOOLING : in this menu it’s possible to control the opening of freecooling damper
INC: to increase the value use the UP key / DEC: to decrease the value use the DOWN key
• VE SPEED: this is the speed of evaporator fan which can be controlled by this menu
INC: to increase the value use the UP key / DEC: to decrease the value use the DOWN key
• VC SPEED: this is the speed of condenser fan which can be controlled by this menu
INC: to increase the value use the UP key / DEC: to decrease the value use the DOWN key
• TIMER : this is a parameter which indicates how long it’s possible to stay under manual control. The following screen
is displayed:
Time going out from
the manual control
xx min
When the time is over, all the manual controls will be switch off. The displayed time is in minutes from 0 to 255.
4.7. Automatic lead lag management (master-slave)
The parameter involved is:
• M190 ENABLE CONTROL OF SEQUENCING SYSTEM: pre-set = YES
The configuration Master-Slave is a system where there are only two units: one of them is the master and the other one
the slave. The master board will control all the logic functions of the system and it can ask support to the slave to cool
or to heat.
To enable the control of the Master-Slave system set M190 to YES. If M190 is set to NO, the two boards will work as in
stand alone mode.
The Lead Lag Management is an algorithm which allows two independent units, installed in parallel in the same ambient,
to work alternatively on a time base. The stand by unit is ready to work in case of alarm of the first one or peak of load.
A control is made on temperature and humidity of the ambient. If only one unit isn’t able to satisfy the demand of heating,
cooling or dehumidification, after a time settable the other unit will start. The support function can be enabled from the
mask. In the same mask is visualised the number of hours which the unit has been working as support.
The setup parameters involved are:
• S01 COOLING SET POINT (CS) : pre-set = 25°C
• S06 COOLING BAND : pre-set = 5°C
• M01 AUTOMATIC LEAD LAG ADDRESS : pre-set : 0
• M03 NUMBER OF PRESENT UNITS : in this case its value will be : 2
• M04 MAX NUMBER OF UNITS ON : pre-set = 1
• M05 ROTATION HOURS SETTING: pre-set= 24 h
It allows to set rotation hours between master and slave in normal working.
• M06 LEAD LAG ENABLE : pre-set = 2
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