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4 Commissioning
4�1 Basic settings
4�1�1 master or slave
Each plant must have exactly one heat pump configured as master. If there is
more than one pump the others have to be configured as slaves. The master/
slave setting is done by a small switch in the controller cabinet. The switch is on
the upper side of the HPC-RM module. Set this switch to the rightmost position
to make the heat pump the master, or leftmost to make it a slave. The control
system has to be restarted for a change to take effect.
When the controller computer WM HPC has started and is ready, which takes
about a minute, the green status LED is lit. If the master LED is also lit, the de-
vice is in master mode. If not it is in slave mode.
When connecting slave pumps and expansion modules to a master, connect
a cable from Exp. out on the master HPC RM to either the Exp. in on an expan-
sion module or Exp. slave on a slave pump HPC RM. Continue by connecting
Exp. out to the next expansion module or slave pump. It does not matter how
expansion modules and slave pumps are mixed.
4�1�2 settings in each heat pump
In each heat pump, regardless of whether it is a master or slave, configura-
tions have to be set as to whether it is connected to make hot water or not. In
the menu Settings/Heat pump you will find the setting Hot water production
(8.1.2) where this is defined.
In the same menu you will also find the setting Pressure/flow guard (8.1.9),
which tells the controller system what kind of guard is installed to monitor the
brine flow. This also has to be correct before the plant can be used.
4�1�3 extra heater
In the master pump you have to configure the type of extra heater connected
to the system. This is done in the menu Settings / Extra heater with the setting
Extra heater type (8.3.1).
4�1�4 expansion modules
First check that each HPC-EM module has the correct function set on the dip
switches for the task it is assigned to do. An HPC-EM can be used as a WCS,
TWC, or Shunt module, and the corresponding LED should blink until activa-
ted in the master. The green power LED should be lit if the module is correctly
connected to the master. This is also true for the cooling module HPC-CM. If
the power LED is blinking this means that the module has power, but cannot
communicate with the master. This is the case for example during the time the
master is booting after a power reset.
Danfoss – 33
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