97
Outdoor unit: Viessmann NTC 50 k
Ω
(no marking)
ϑ / °C R / kΩ ϑ / °C R / kΩ ϑ / °C R / kΩ ϑ / °C R / kΩ ϑ / °C R / kΩ ϑ / °C R / kΩ
–25 660.930 1 153.000 27 45.074 53 15.753 79 6.332 105 2.872
–24 620.940 2 145.420 28 43.163 54 15.173 80 6.129 106 2.792
–23 583.720 3 138.260 29 41.313 55 14.618 81 5.934 107 2.715
–22 549.040 4 131.500 30 39.610 56 14.085 82 5.746 108 2.640
–21 516.710 5 126.170 31 37.958 57 13.575 83 5.565 109 2.568
–20 486.550 6 119.080 32 36.384 58 13.086 84 5.390 110 2.498
–19 458.400 7 113.370 33 34.453 59 12.617 85 5.222 111 2.431
–18 432.100 8 107.960 34 33.453 60 12.368 86 5.061 112 2.365
–17 407.510 9 102.850 35 32.088 61 11.736 87 4.904 113 2.302
–16 384.510 10 98.006 36 30.787 62 11.322 88 4.754 114 2.241
–15 362.990 11 93.420 37 29.544 63 10.925 89 4.609 115 2.182
–14 342.830 12 89.075 38 28.359 64 10.544 90 4.469 116 2.124
–13 323.940 13 84.956 39 27.227 65 10.178 91 4.335 117 2.069
–12 306.230 14 81.052 40 26.147 66 9.827 92 4.204 118 2.015
–11 289.610 15 77.349 41 25.114 67 9.490 93 4.079 119 1.963
–10 274.020 16 73.896 42 24.128 68 9.166 94 3.958 120 1.912
–9 259.370 17 70.503 43 23.186 69 8.954 95 3.841 121 1.865
–8 245.610 18 67.338 44 22.286 70 8.555 96 3.728 122 1.816
–7 232.670 19 64.330 45 21.425 71 8.268 97 3.619 123 1.770
–6 220.500 20 61.478 46 20.601 72 7.991 98 3.514 124 1.725
–5 209.050 21 58.766 47 19.814 73 7.726 99 3.413 125 1.682
–4 198.270 22 56.189 48 19.061 74 7.470 100 3.315 126 1.640
–3 188.120 23 53.738 49 18.340 75 7.225 101 3.220 127 1.600
–2 178.650 24 51.408 50 17.651 76 6.988 102 3.129 128 1.560
–1 169.680 25 49.191 51 16.990 77 6.761 103 3.040 129 1.522
0 161.020 26 47.082 52 16.358 78 6.542 104 2.955 130 1.485
Checking the fuses
For fuse locations: See page 38 onwards.
■
Fuse F1 is located on the mains terminal of the heat
pump control unit.
Fuse type:
–
6.3 A H (slow), 250 V~
–
Max. power loss ≤ 2.5 W
■
Fuse F3 is located on the main PCB.
Fuse type:
–
2.0 A H (slow), 250 V~
–
Max. power loss ≤ 2.5 W
■
The fuses for the fan and the refrigerant circuit con-
troller are located in the outdoor unit above the EEV
PCB.
Danger
Removing fuses does not switch the power
circuit to zero volt. Contact with live compo-
nents can lead to serious injury from electric cur-
rent.
Before working on the equipment, always
ensure that the power circuit is also at zero
volt.
1. Switch OFF the power supply.
2. Opening the wiring chamber.
Maintenance
Checking the temperature sensors (cont.)
6199585
Maintenance
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