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2.10 Controller keyboard
2.10.1 How to lock the keyboard
Keep the
and
keys pressed simultaneously for more than 3 seconds. The "PoF" message
will be displayed and the keyboard will be locked. At this point it is only possible to see the setpoint
or the maximum or minimum temperatures stored. If a key is pressed for more than 3 seconds, the
"PoF" message will be displayed.
2.10.2 How to unlock the keyboard
Keep the
and
keys pressed simultaneously for more than 3 seconds, till the "Pon" message
is displayed.
2.11 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 14 gives an overview of the
parameters available in programming level 1 "Pr1".
Code
Description
Refrigerant selection
C07
for regulation
Digital compressor
C16
setpoint
Proportional band for
C17
compressor regulation
Cycle time for digital
C21
compressor
Minimum capacity for
C24
digital compressor
Maximum fan motor
E62
speed
Delta temperature
E66
condenser floating
setpoint
T18
Access to Pr2 level
Table 14: Parameters in programming level Pr1
NOTE: The full list of parameters in programming level "Pr2" can be found in Technical
Information CC7.8.13 "Copeland EazyCool™ Large Outdoor Condensing Units – iPro XCM25D
Controller Parameter List".
2.12 Digital operation
A Digital unit is able to operate in 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. For
proper commissioning of the Digital unit the diagram in Figure 15 must be considered.
The regulation starts when the suction pressure (AI1) increases and reaches the value
(SP-PB/2+(PB*PMI)/100)
(SP-PB/2~SP+PB/2) or (C16–C17/2 ~ C16+C17/2) 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 (C16 + C17/2) then the TRIAC output is at maximum
capacity. When the pressure is lower than (SP + PB/2) or (C16 + C17/2) 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)/ (C16-C17/2) the Digital Scroll compressor switches off.
C6.1.9/0219/E
R404A(0-404) - R507(1-507) - R134A(2-134)
R22(3-R22) - R407C(4-07C) - R407A(5-07A)
R407F(6-07F) - R448A(48A) - R449A(8-49A)
- R410A(9-410)
C03 to C04
0.1 to 9.9 bar; 0.1 to 99.9 PSI;
0.1°C to 25.5°C
10 to 40 sec
30 to 100%
0.0°C to 25.5°C
or
(C16-C17/2+(C17*C24)/100).
Range
0 to C25
[0÷999]
Within
the
Factory
Factory
setting
setting
MT
LT
8-R449A
8-R449A
2.8
0.3
2.0
1.0
10
10
20
10
100
80
14
8
3 2 1
3 2 1
adjustment
range
17
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