14 C6.1.6/0513-0515/E
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”. Here is the overview about
the parameters which are in programming level 1 “Pr1”.
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
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