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10.2.1
Measurement checking sensors during fault tracing
Table 8.
Outdoor sensor / Defrost sensor
°C
ohm, Ω
-30
1884
-25
1443
-20
1115
-15
868
-10
681
-5
538
0
428
5
343
10
276
15
224
20
183
25
150
30
124
35
103
40
86
Table 9.
other sensors
°C
kilo ohm, kΩ
0
66,3
5
52,4
10
41,8
15
33,5
20
27,1
25
22,0
30
18,0
35
14,8
40
12,2
45
10,1
50
8,5
55
7,1
60
6,0
65
5,0
70
4,2
75
3,7
80
3,1
85
2,7
10.3
Check points
Table 10.
Temperatures
Name
Values
Condensing temperature
0.5 – 1.5 °C above supply line temperature
Evaporation temperature
7 - 8 °C lower than incoming brine
Superheating
4 - 8 K temperature difference
Radiator circuit
5 - 10 K temperature difference
Brine circuit
2 - 5 K temperature difference
Overheating R407C
4K ±1 K
Table 11.
Expansion valve factory setting
Name
Setting
Danfoss TUBE R404A, 4.2 kW
From fully closed position, screw 3 turns out
Danfoss TUBE R404A, 5.6 kW
From fully closed position, screw 5,5 turns out
Danfoss TUBE R404A, 8,4 kW
From fully closed position, screw 5 turns out
Danfoss TUBE R404A, 12.0 kW
From fully closed position, screw 5.25 turns out
Danfoss TUBE R404A, 15.3 kW
From fully closed position, screw 2.75 turns out
36 – Service instructions VMGFC302
Summary of Contents for DHP-A
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