IOM / @DNOVA-µAC-0907-E - Page 7
c= compressor management parameters
c1 Minimum on time
Sets the minimum activation time for the compressor,
irrespective of request (see diagram at the end of the
paragraph).
Range: 0÷300s Def.: 60
c2 Minimum oFF time
Sets the minimum off time for the compressor, irrespective of
request (see diagram at the end of the paragraph).
Range: 0÷900s Def.: 60
c3 Minimum time between two start-ups
Sets the minimum time between two successive start-ups of
the same compressor, irrespective of request. This limits the
number of start-ups by time (see diagram at the end of the
paragraph).
Range: 0÷900s Def.: 360
c4 Minimum time between the start-up of two
compressors
Sets the minimum time which must elapse between successive
start-ups of 2 compressors (if configured for 2 comp.). Delaying
the activation of the compressors avoids overloading the line
due to close or simultaneous peaks.
Range: 0÷300s Def.: 30
c5 oFF delay between the two compressors
Sets the minimum time which must elapse between the shutting
down of different compressors.
Range: 0÷300s Def.: 0
c6 compressor rotation
Allows the compressors to exchange priority for start-up and
shut-down.
0= rotation disabled
1= rotation enabled (with H5= 2 or 5).
The rotation is FIFO, that is the fist compressor to be switched
on is the first to be switched off.
Range: 0÷1 flag Def.: 0
c7 comp. on delay from supply fan start-up
Sets the minimum time which must elapse between the start-up
of the fan and the activation of the compressor.
Range: 0÷300s Def.: 20
c8 Hour counter threshold for compressor operation
Sets the number of hours of compressor operation beyond
which the maintenance request is signalled.
0= this function is not handled.
Range: 0÷30000 hours Def.: 0
c9 Hour counter compressor 1
cA Hour counter compressor 2
Indicates the number of operating hours of compressor 1
and/or 2. Pressing the and buttons together during the
display of this parameter resets the hour counter (only in USER
or FACTORY mode) and cancels the maintenance request, if
enabled. Management of the hour counter is suspended during
the setting of the parameters, while the data is written to the
EEPROM every 30 mins.
Range: 0÷30000 hours Def.: 0
F= fan management parameters
F1 Fan operating mode
This parameter imust be set to 0 during the setting of limits
F2 and F3.
0= always ON
1= proportional speed regulation with minimum speed
2= proportional speed regulation with cut-off
The values 1 or 2 indicate operation of the supply fan in
proportional mode with Hb=0; if, on the other hand, phase-cut is
used for the condensation fan with Hb= 1 or 2, operation is that
described in the diagrams at the end of the paragraph. The fan
is only activated when at least one of the compressors is on.
In the case of condensation probe B3 malfunction, the fan is
forced on at maximum speed, (F8), if the external temperature
(B2) is greater than 15°C; on the other hand, if
the temperature is lower than 15°C, the fan operates at an
average of the values F7 and F8.
Range: 0÷2 flags Def.: 1
F2 Minimum triac voltage threshold
F3 Maximum triac voltage threshold
In the case of proportional fan speed regulation, installation
of the power board MCHRTF*0A0 is required. In this case
parameters F2 and F3 must be set to obtain at the output the
minimum and maximum voltage, respectively, accepted by the
motor used. The values set do not correspond to the effective
voltage in Volts, but to an internal calculation of the µAC.
With the CONV0/10A0 module, or with FCS3** three-phase
regulators, set F2= 0 and F3= 100.
Range F2: 0÷F4 step Def. F2: 35
Range F3: F3÷100 step Def. F3: 75
F4 Duration of triac impulse
Represents the width, in milliseconds, of the on pulse of the
triac. For inductive-type motors set F4= 2; on the other hand,
for capacitative-type motors or with the CONV0/10A0 module,
or with FCS3** three-phase regulators, set F4= 0.
Range: 0÷15ms Def.: 2
F5 Regulation band percentage for minimum speed or
temp./pressure for minimum speed in condensation
F6 Regulation band percentage for maximum speed or
temp./pressure for maximum speed in condensation
When fan speed regulation is used to control the main fan,
F5 and F6 represent the percentage of the regulation band;
when on the other hand it is used to control the condensation
fan, F5 and F6 are absolute temperature or pressure values
(see Fig. 7).
Warning:
if the parameter indicates a temperature, this is
not automatically converted to Fahrenheit on changing the
parameter /C (see diagrams at the end of the paragraph).
Range F5: 0÷F6%, °c, °F F5: /4÷F6 bar Def. F5: 20
Range F6: F5÷100% F5÷158°c, °F F5÷/5 bar Def. F6: 100
F7 Minimum output value
Specifies a speed value above the minimum value, set
using the parameter F2. (see diagrams at the end of the
paragraph).
Range: 0÷F8% Def.: 10
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS
