FISCHER [CF] EASY User Manual page 67

2.10.2 How to unlock the keyboard
keys pressed simultaneously for more than 3 seconds, till the "Pon"
Keep the and
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". Here is the overview about
the parameters which are in programming level 1 "Pr1".
Parameter
Compressor cut-in pressure
C01
setpoint
Compressor cut-out pressure
C02
setpoint
Refrigerant selection for
C07
regulation
C16 Digital compressor setpoint
Proportional band for
C17
compressor regulation
Cycle time for digital
C21
compressor
Minimum capacity for digital
C24
compressor
Maximum capacity for digital
C25
compressor
E39 Condenser setpoint
Regulation band of variable
E46
fan
N01 Current minute
N02
Current hour
N03 Day of month
N04 Month
N05 Year
T18 Access to Pr2 level
Table 14: Parameters in Pr1
The full list of parameters in programming level 2 "Pr2" can be found in Appendix 4.
2.12 Pumpdown – General
Pumpdown functionality is provided by the XCM25D for condensing unit models CFME & CFLE.
It is not recommended for Digital units CFDE.
In case of pumpdown the user needs to install an additional solenoid valve in the liquid line
which is not part of the standard delivery equipment. In addition to the liquid line solenoid valve a
digital input signal from a room thermostat or a case temperature sensor must be connected to
the XCM25D. There are additional terminals available in the unit which allow the easy
connection of additional hardware if required. The wiring diagram also shows these optional
features. The liquid line solenoid valve Y3 can be connected on terminals X1.N & X1.8. The
terminals X1.9 & X1.10 can be used for a room thermostat (connected to DI3).
If a temperature sensor is preferred use analog input AI7 (Caution: terminals are not
preconfigured for temperature sensor). For details about different options please see Chapters
2.12.1 "Pumpdown with room thermostat" and 2.12.2 "Pumpdown with temperature sensor".
In any case there are limitations for the cut-out values of the compressors given by the
envelopes. The minimum cut-out settings are shown in Table 15. Those values are also
14
Description
Factory
Unit
setting
Not used for Digital
[bar] 4.0
Not used for Digital
[bar] 2.0
R22, R407A, R407F,
[-] R404A R507, N40, DR33,
R134a, R407C
Not used for CFME &
[bar] 3.3
Not used for CFME &
[bar] 2.0
Not used for CFME &
[sec] 10
Not used for CFME &
[%] 20
Not used for CFME &
[%] 100
[°C] 35.0
[°C] 10.0
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[-] [-] Password: 3 2 1
Comment
CFDE
CFDE
CFLE
CFLE
CFLE
CFLE
CFLE
C6.1.6/0513-0515/E