Measurement Points; Check Points - Danfoss DHP-AX Installation And Service Instructions Manual

15.2

Measurement points

Conversion table for sensors
D B BB
When reading the resistance of the sensors, the sensor leads must first be disconnected from the control
equipment.
Outdoor sensor
°C
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
15.3

Check points

Temperatures
Name
Condensing temperature
Evaporation temperature
Overheating
Radiator circuit
Overheating R407C
Other sensors
°C
Ohm, Ù
1884 0
1443 5
1115 10
868 15
681 20
538 25
428 30
343 35
276 40
224 45
183 50
150 55
124 60
103 65
86 70
75
80
85
90
95
1.
Kiloohm,
kÙ
2.
66,3
52,4
3.
41,8
33,5
27,1
22,0
18,0
14,8
12,2
10,1
8,5
7,1
6,0
5,0
4,2
3,7
3,1
2,7
2,3
2,0
Values
0.5 – 1.5 °C above supply line temperature
7 - 8 °C lower than incoming brine
4 - 8 K temperature difference
5 - 10 K temperature difference
4K ±1 K
VMBMH302
Disconnect the sensor cable at the I/O
card.
First measure the sensor including the
cable.
Then measure the sensor only.
Service – 45