I-Cr Connections; Keyboard - MAXA i-290 0106 Installer Manual

14.4 I-CR CONNECTIONS
Two connection cables are required between chiller unit or heat pump and i-CR remote control:
• 3X1.5mmq shielded twisted pair cable for Modbus R+/R-/GND communication.
• 2x1.5mmq cable for 12Vac power supply.
DESCRIPTION
CABLE 1
POWER SUPPLY
CABLE 2
COMMUNICATION
CABLE 3
DIGITAL INPUT
Example of connection to an i-290 unit:
i-CR TERMINAL BLOCK
J5
12 Vac
12 Vac
14.5 KEYBOARD
The backlighting of the LEDs is switched off if the keyboard has not been used for more than 1 minute. In this case, the first press of a key switches
the LEDs on without performing the function associated with the key.
There are 6 capacitive keys.
ON/OFF BACKLIGHT
UP
DOWN
KEY
ON/OFF BACKLIGHT
Function that works at the thermostat level, switches LEDs and backlight off/on.
When the keypad is in OFF mode, does not accept commands.
This function has no effect on machine control, but enables/disables thermostat interaction.
Allows you to exit the menu.
If pressed for 3 seconds, activates standby mode and locks the keyboard (lock icon appears).
This functionality has no effect on the machine control, but enables/disables user interaction with the thermostat key-
board.
TERMINALS i-CR
PIN 12
PIN 13
PIN 9
PIN 7
PIN 8
PIN 1
PIN2
J1
GND
R -
R +
J17
J2
ID
ID
TA
CABLE 1
i-290
UNIT TERMINALS
12 Vac
12 Vac
GND RS485
RS485 +
RS485 -
CABLE 2
1A
1B
1C
DESCRIPTION
Inverter air/water heat pumps with axial fans
NOTE
SHIELDED AND TWISTED CABLE
VOLTAGE-FREE CONTACT
i-290 USER BOARD
12-1 12-2
CHRONOTHERMOSTAT
CHANGE SEASON
ENTER
55