CIAT XtraConnect 2 - 8 PRESSURE SENSOR

EN - 34
► Fault detection values:
- 50 K sensors: short circuit fault if < 5°C and the unit has been
running for 5 minutes. Sensor cut (or sensor missing) if > 148°C.
- 10 K sensors: short circuit fault if < –40°C. Sensor cut (or sensor
missing) if > 99°C.
► Correspondence table
8 PRESSURE SENSOR
The high and low values for the HP/LP pressure sensors are given below:
- Power supply: 5 V DC
- Signal: 0.5 - 4.5 V
- Measurement range:
● The HP sensor will:
- Monitor the high pressure in the circuit and relay this information
- Control the unit using the HP
- Adjust the speed of the fans (if P21 = Yes) or turn them on and off
● The LP sensor will :
- Monitor the low pressure in the circuit and relay this information
- Monitor for refrigerant leaks before turning on stages
● The slopes of the sensors are adjusted using parameters P30
to P41.
Important: The pressure values given are for relative pressure
Short-circuit faults will be detected for a voltage ≥ 4.75 V.
Open-circuit faults will be detected for a voltage ≤ 0.25 V.
If a difference is found between a reading parameter and the value measured by the corresponding pressure gauge, the sensors can be
adjusted by pressing the OK button.
Example:
Temperature (°C)
Sensor resistance (Ω)
50 KΩ
discharge sensor
10 KΩ
control and outdoor sensor
-10 - 55340
-5 - 42340
0 162250 32660
5 126977 25400
10 99517 19900
15 78570 15710
20 62468 12490
25 50000 10000
30 40280 8058
35 32650 6532
40 26624 5326
45 21834 4368
50 18005 3602
From to
P31 P30 HP1
P33 P32 HP2
P35 P34 HP3
P37 P36 LP1
P39 P38 LP2
P41 P40 LP3
Pxxx HIGH PRESSURE CIRCUIT X ↑
xx xb↓
0.5 V 4.5 V
Pressure
Voltage