Parameters Level 1 - Required Settings; Digital Operation - Emerson Copeland EazyCool ZX Series Application Manuallines

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 21 gives an overview of
the parameters available in programming level 1 "Pr1".
NOTE: When changing parameters C01 (Cin), C02 (CoU) and C05 (CPb) a reset of the
controller (interruption of power supply) is required.
Parameter Description
Compressor cut-in pressure
C01
setpoint
Compressor cut-out pressure
C02
setpoint
Refrigerant selection for
C07
regulation
C16 Digital compressor setpoint
Proportional band for compressor
C17
regulation
C21 Cycle time for digital compressor
Minimum capacity for digital
C24
compressor
Maximum capacity for digital
C25
compressor
D29 Low-pressure alarm value
E39 Condenser setpoint
E46 Regulation band of variable fan
N01 Current minute
N02 Current hour
N03 Day of the month
N04 Month
N05 Year
T18 Access to Pr2 level
* Pressure values are always relative
Table 21: Parameters in programming level Pr1
NOTE: The full list of parameters in programming levels 1 and 2 can be found in Technical
Information TI_Unit_ZX_A2L_01 "Copeland™ EazyCool ZX Condensing Units – XCM25D
Controller Parameter List".

2.14 Digital operation

WARNING
Ignition source in a potentially flammable atmosphere! Fire hazard! All
electrical components, including digital solenoid valves, could be a source of
ignition and must always be switched off during service and maintenance.
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. 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
(C16-C17/2+(C17*C24)/100). Within the adjustment range (C16-C17/2 ~ C16+C17/2) the Digital
scroll compressor is activated in PWM mode according to the value of the control variable.
When the pressure is higher than (C16+C17/2) then the TRIAC output is at maximum capacity. When
the pressure is lower than (C16+C17/2) but higher than (C16-C17/2) the Digital compressor
22
Factory
Unit
settings
bar* 4.0
bar* 2.0
- R404A R454A, R454C, R455A
bar* 3.3
bar* 2.0
sec 10
% 20
% 100
bar* 0.5
°C 35.0
°C 10.0
- -
- -
- -
- -
- -
- -
Comments
Not used for
Digital ZXDY
Not used for
Digital ZXDY
Not used for
ZXMY
Not used for
ZXMY
Not used for
ZXMY
Not used for
ZXMY
Not used for
ZXMY
Password: 3 2 1
AGL_Unit_ZX_A2L_E_Rev00