EVCO EPU2LXP1CH Installer manual - Manual (Page 54)

EVCO S.p.A. c-pro 3 micro CHIL | Application manual ver. 1.0 | Codice 144CP3CHE104
page 54 of 120
8.4 Operating Mode Control
The operating mode can take on the following values:
“MOdE” parameter Operating mode Description
0=CooL Chiller Summer operation
1=Heat Heat pump (*) Winter operation
(*) Heat pump operation is only possible if the machine has been configured as chiller + heat pump
(parameter PG00=2,4).
If the machine has only been configured as chiller (parameter PG00=1,3), the MOdE parameter is no longer modifiable, thus the
operating mode is fixed at 0 (i.e. CooL).
There are several procedures which enable configuration of the machine’s operating mode:
Via the MOdEparameter, accessible from the User menu.
Setting – Go to the parameter, then, pressing the ENTER key, modify the value using the UP and DOWN keys. Confirm by pressing
ENTER once more: the corresponding icon will confirm that modification has been successful.
Via the command Summer/winter from digital input (this function is enabled by parameters PH08).
Setting – With open contact, the unit is set for winter operation, whereas with closed contact it is set for summer operation.
Commutation of the digital input switches the unit OFF, changes its operating mode, and then switches the unit back ON.
Using a supervisory protocol (this function is enabled via parameter PH10).
Setting – Send from protocol the operating-mode change command: the corresponding operating mode icon will confirm that
modification has been successful.
Via the automatic Change-over function (this function is enabled via parameter PH06).
Setting – When the outdoor air temperature value exceeds the Summer Commutation Set Point PC61, the unit commutates to summer
operating mode. Conversely, when the outdoor air temperature value falls below the Winter Commutation Set Point PC62, the unit
commutates to winter operating mode.
In order to enable this function, the outdoor air temperature sensor must be enabled.
WARNING – Operating mode change-over can also happen while the machine is ON: in this case, the machine switches itself OFF –
complying with all its timings – then commutates, and thereafter switches itself back ON automatically.
Note: During commutation, high and low-temperature controls are enabled.
Note: Commutation is disabled during defrosting cycles.
Cooling Mode
Heating Mode
PC61 PC62
OFF
OFF
ON
ON
Outdoor air T.