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 K
Ω
discharge sensor
10 K
Ω
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
P x x x H I G H P R E S S U R E C I R C U I T X
↑
x x x b
↓
0.5 V
4.5 V
Pressure
Voltage