Technical data

Ichill 200CX EVO rev 1.1 14/11/2013
Pag. 37 of 151
With active contact if the unit is being switched off by keyboard it can be switched on by keyboard. If the unit
is being switched off by keyboard, in order to switch on the unit from digital input it must be deactivated and
activated.
DIGITAL INPUT CONFIGURATED AS HEAT PUMP REQUEST
The machine has to be configured as condensing unit CF03 = 1.
• If the digital input is not active the unit is on stand-by and the display shows OFF
• If the digital input is active the unit is on in heating and the display shows OnH
With active contact if the unit is being switched off by keyboard it can be switched on by keyboard. If the unit
is being switched off by keyboard, in order to switch on the unit from digital input it must be deactivated and
activated.
15. CHILLER / HEAT PUMP SELECTION
Select the Chiller or the Heat pump mode
The CF59 parameter allows to select and enable the running mode:
Par. CF59 = 0: Through keyboard
The user can start and stop the unit using the keys of the front panel.
Par. CF59 = 1: Through digital input programmed to start/stop the unit from remote control.
• This selection is enabled if there is one digital input configured as start/stop from remote (remote chiller /
heat pump). I non of the digital input are configure the unit remains in stand–by.
• The “open” status of the input forces the chiller running mode.
• The “closed” status of the input forces the heat pump running mode.
• The keyboard selection is disabled.
• The key on the front panel can start/stop the unit only with the digital input selection
Par. CF59 =2: Automatic selection of the Chiller - Heat Pump through analogue input
The analogue input selection or change over function overrides the digital input C-HP function. If the external
air temperature are within the CF81 differential, the user can change the running mode from the keyboard.
If the unit is running with CF79 = 1 or CF79=2, and it is requested a running mode change, the controller
turns off all the outputs, starts a fixed delay time signalled by the chiller or heat pump blinking led. This
blinking led indicates which running mode will be activated after the compressor delay time protection.
Change Over
CF60 Change over Setpoint. If the analogue input control (from probe) function is enabled, it represents the
limit temperature of the probe value under which the unit runs the Heat Pump mode.
CF61 Change over Differential. If the analogue input control (from probe) function is enabled, it represents
the limit differential temperature of the probe value to restart in the Chiller mode.
For external air temperature within CF81 the user can manually change the status from keyboard.
GRAPH: AUTOMATIC CHANGE OVER