16
C6.1.10/0118-0318/E
2.12.2 How to unlock the keyboard
Keep the
and
keys pressed simultaneously for more than 3 seconds, till the
"Pon"
message is displayed.
2.13 Parameters level 1
– Required settings
The XCM25D is preconfigured to reduce the required settings on job-site to a minimum. In most
cases it will not be necessary to enter programming level 2
"Pr2"
.
Table 16
gives an overview of
the parameters available in programming level 1
"Pr1"
.
NOTE: When changing parameter C05 (LS) a reset of the controller (interruption of power
supply) is required.
Parameters
Description
Unit
Factory
setting
Comments
ZXDE
ZXDI
C07
rEF
Refrigerant selection for
regulation
[-]
R404A
R134a, R404A, R407A,
R407F, R448A, R449A,
R450A, R513A
C16
StC
Digital compressor
setpoint
[bar]
3.3
C17
Pbd
Proportional band for
compressor regulation
[bar]
2.0
C21
tdG
Cycle time for digital
compressor
[sec]
10
C24
PMi
Minimum capacity for
digital compressor
[%]
20
C25
PMA
Maximum capacity for
digital compressor
[%]
100
D29
LPA
Low-pressure alarm value
[bar]
0.5
E39
FSP
Condenser setpoint
[°C]
35.0
E46
Fbd
Regulation band of
variable fan
[°C]
10.0
N01
Min
Current minute
[-]
[-]
N02
Hr
Current hour
[-]
[-]
N03
MdY
Day of the month
[-]
[-]
N04
Mon
Month
[-]
[-]
N05
YEr
Year
[-]
[-]
T18
PAS
Access to Pr2 level
[-]
[-]
Password: 3 2 1
Table 16: Parameters in programming level Pr1
NOTE: The full list of parameters in programming level "Pr2" can be found in Appendix 4.
2.14 Digital operation
A Digital unit is able to operate in a part-load mode. Part-load operation is achieved by loading
and unloading of the Digital scroll compressor for certain periods of time (time cycles). The cycle
of time can be chosen between 10 and 30 seconds. Example: if the time cycle is 20 seconds at
50% of capacity request, the compressor will run for 10 seconds loaded and 10 seconds unloaded.
The regulation starts when the suction pressure (
AI1
) increases and reaches the value
(SP-PB/2+(PB*PMI)/100) or (
StC
-
Pbd
/2+(
Pbd
*
PMi
)/100). Within the adjustment range
(SP-PB/2~SP+PB/2) or (
StC
-
Pbd
/2 ~
StC
+
Pbd
/2) the Digital scroll compressor is activated in
PWM mode in accordance with the value of the control variable.
When the pressure is higher than (SP+PB/2) or (
StC
+
Pbd
/2) then the TRIAC output is at
maximum capacity. When the pressure is lower than (SP+PB/2) or (
StC
+
Pbd
/2) but higher than
(SP-PB/2) the Digital Scroll compressor modulates the capacity according to the proportional
band. If the pressure is lower than (SP-PB/2)/ (
StC
-
Pbd
/2) the Digital Scroll compressor switches
off.
