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2.9 XCM25D Electronic controller
– Features
The XCM25D controller is designed to be a powerful, flexible controller for use in multiple
applications. It has been developed for condensing units and allows the adjustment of all relevant
parameters by the user.
2.9.1 Description
WARNING
Electrical shock hazard! Serious personal injuries!
There are unused fast-
on pins (C1 & DO2) on the XCM25D which could be under voltage. They are
covered by insulated fast-on flags in the factory. Handle carefully when
removing insulating flags during service on site.
The controller is designed for usage in an outdoor refrigeration unit. It is rated to be used for the
following environment:
▪
Outdoor controller ambient temperature for operation: -40
C to 60
C
▪
Ambient temperature for storage: -40
C to 80
C
▪
Maximum humidity: 90% at 48
C (non-condensing)
▪
Board power: 24V AC +15%/-20%
▪
Voltage sensing capabilities - Single phase: 100-120, 200-240V AC ± 10%
▪
Voltage sensing capabilities - Three phase: 200-240, 380-460, 575V AC ± 10%
The units of measure are selectable. The factory default unit is [bar] (always considered relative) for
pressure and [°C] for temperature.
Figure 6: Electronic controller
2.9.2 Functionality
The controller allows for easy commissioning by the technician with the factory settings at the highest
program level. It also offers the possibility to make substantial changes to the system optimization in
further programming levels. Advanced functionalities can also be activated.
The following functions are covered by the controller:
▪
Condensing unit control
▪
Case control
▪
Condenser fan control
▪
Defrost
▪
Voltage and current sensing (compressor protection)
▪
Liquid and vapour injection
▪
System EXV control
▪
Digital compressor control
NOTE: The XCM25D controller on ZX units includes all the functions necessary for unit
control. For additional functionalities please contact your local Application Engineering
representative.
