CIAT XtraConnect 2 - 18.2 Operating mode

EN - 43
18.2 Operating mode
The operating mode cannot be changed while the machine is running unless P119 = 5 (automatic machine control or automatic pump control
input open, or On/Off set to Off).
If the unit is turned back on while P119 is being modified, the parameter closes and returns to its initial value.
► If P119 = 1 (cooling)
Cooling only.
► If P119 = 2 (heating)
Heating only.
► If P119 = 3 (Cooling/Heating via console)
The operating mode cannot be changed while the machine is running (automatic control input set to On, or On/Off button set to Off).
The Heating/Cooling button will be disabled if it is pressed while the machine is running.
► If P119 = 4 (Cooling/Heating via on/off input)
The operating mode cannot be changed while the machine is running (automatic control input set to On, or On/Off button set to Off).
Attempting to change the operating mode while the machine is running will result in a fault:
- Machine stopped.
- Machine fault and circuit fault relays change to the On position.
- General fault LED on.
- Initial operating mode LED flashing (50-50)
Display:
 Automatic reset:
- Either the machine changes its operating mode if the change is confirmed by pressing On/Off or if the automatic control input is open;
- Or the mode change is not confirmed (contact returns to initial state) and the unit resumes its initial operation state.
► If P119 = 5, the machine switches between heating and cooling depending on the outdoor temperature:
- This function is displayed only if P2 = water-to-water
- The minimum/maximum heating/cooling limits are disabled by default. As a result, it is best to adjust the limits when this function is enabled.
- This function only manages changes in the machine's operating mode. It does not manage the valves on the hydraulic circuit; they must be
controlled by the customer.
- When an operating mode reaches its end temperature setpoint in automatic mode, the following message is displayed until a mode is turned
on:
The two heating and cooling LEDs flash while this message is displayed.
The pump is shut off in the deadband.
UNIT STOP CHANGE
OF OPERATION MODE
P136 MAX AIR TEMP.
AUTO HEATING MODE –xx
P137 MIN AIR TEMP.
AUTO COOLING MODE –xx
DEAD BAND AUTO
HEATING/COOLING
P225 P225-2K P136-1K P136
P137 P13-1K P225.1-2K P225.1
1
1
0
0
Unit status
HEATING
MODE
COOLING
MODE
Outdoor
temperature
Unit status