EN/07.2013/58/91
7.6. Custom 6
Dirty second filter
The signal of alarm is the A3 DIG-IN. When the alarm works, after a minute its cause appears. The alarm is associated
to the “common alarm” relay; the reset is automatic.
In the following table the “alarm description” is shown as it will appear on the LCD during alarm condition or in the alarm
history menu.
ENGLISH ALARM DIRTY FILTER 2
Hardware tests
If the machine is off, by the A4 DIG-IN it’s possible to start a cycle to test the hardware of the machine.
This cycle is composed by three phases which length is equal to the timer set in the manual control menu.
– Cooling: in the first phase the compressor, condenser fan and evaporator fan are switched on at their maximum
speed. All the other devices are off.
– Heating: in the second phase the heater and the evaporator fan are switched on at their maximum speed. All the
other devices are off.
– Freecooling: in the third phase the damper is at its maximum opening and the evaporator fan is switched on at its
maximum speed. All the other devices are off.
At the end of the cycle, the controller will be off.
During the cycle it’s not possible to switch on the machine, but by the DIG-IN A4 it’s possible to stop the cycle.
7. 7. Custom 7
Freecooling
In addition to what is already present, it’s necessary to integrate the control to limit the supply temperature, in case of
freecooling mode.
Execute a proportional control on the supply probe, through the parameters S19 (as minimum opening 0%) and S19+M42
(as maximum opening 100%). The result value has to be compared with the result of the freecooling temperature control
and it has to be considered as an output which with the lower value. In this way we guarantee a supply minimum
temperature as set in S18 parameter. All the other controls must remain the same.
In case of two units, the same control is done, considering their supply probes.
This function is to be integrated on all the custom applications, except custom 1.
Select unit right or left
A parameter for select right or left units has been added.
If I01=0, then: If I01=1, then:
I23 = TI
I24 = No connection
I15 = 0
I16 =100
I23 = No connection
I24 = TI
I05 = 100
I06 = 0
If possible, execute this function in custom 7 application, leaving the possibility to change manually the configuration
defined by I01 parameter.
Every time the I01 parameter is defined, the analogic channels configuration is set as defined in I01 parameter (in case
of custom 7 application).
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