90
Outdoor unit: Viessmann NTC 10 k
Ω
(no marking)
ϑ
/ °C
R / k
Ω
ϑ
/ °C R / k
Ω
ϑ
/ °C R / k
Ω
ϑ
/ °C R / k
Ω
ϑ
/ °C R / k
Ω
ϑ
/ °C R / k
Ω
–
40
325.700
–
8
49.530
24
10.450
56
2.874
88
0.975
120
0.391
–
39
305.400
–
7
46.960
25
10.000
57
2.770
89
0.946
121
0.381
–
38
286.500
–
6
44.540
26
9.572
58
2.671
90
0.917
122
0.371
–
37
268.800
–
5
42.250
27
9.164
59
2.576
91
0.889
123
0.362
–
36
252.300
–
4
40.100
28
8.776
60
2.484
92
0.863
124
0.352
–
35
236.900
–
3
38.070
29
8.406
61
2.397
93
0.837
125
0.343
–
34
222.600
–
2
36.150
30
8.054
62
2.313
94
0.812
126
0.335
–
33
209.100
–
1
34.340
31
7.719
63
2.232
95
0.788
127
0.326
–
32
196.600
0
32.630
32
7.399
64
2.155
96
0.765
128
0.318
–
31
184.900
1
31.020
33
7.095
65
2.080
97
0.743
129
0.310
–
30
173.900
2
29.490
34
6.804
66
2.009
98
0.721
130
0.302
–
29
163.700
3
28.050
35
6.527
67
1.940
99
0.700
131
0.295
–
28
154.100
4
26.680
36
6.263
68
1.874
100
0.680
132
0.288
–
27
145.100
5
25.390
37
6.011
69
1.811
101
0.661
133
0.281
–
26
136.700
6
24.170
38
5.770
70
1.750
102
0.642
134
0.274
–
25
128.800
7
23.020
39
5.541
71
1.692
103
0.624
135
0.267
–
24
121.400
8
21.920
40
5.321
72
1.636
104
0.606
136
0.261
–
23
114.500
9
20.890
41
5.112
73
1.581
105
0.589
137
0.254
–
22
108.000
10
19.910
42
4.912
74
1.529
106
0.573
138
0.248
–
21
102.000
11
18.980
43
4.720
75
1.479
107
0.557
139
0.242
–
20
96.260
12
18.100
44
4.538
76
1.431
108
0.541
140
0.237
–
19
90.910
13
17.260
45
4.363
77
1.385
109
0.527
141
0.231
–
18
85.880
14
16.470
46
4.196
78
1.340
110
0.512
142
0.226
–
17
81.160
15
15.720
47
4.036
79
1.297
111
0.498
143
0.220
–
16
76.720
16
15.000
48
3.884
80
1.256
112
0.485
144
0.215
–
15
72.560
17
14.330
49
3.737
81
1.216
113
0.472
145
0.210
–
14
68.640
18
13.690
50
3.597
82
1.178
114
0.459
146
0.206
–
13
64.950
19
13.080
51
3.463
83
1.141
115
0.447
147
0.201
–
12
61.480
20
12.500
52
3.335
84
1.105
116
0.435
148
0.196
–
11
58.220
21
11.940
53
3.212
85
1.071
117
0.423
149
0.192
–
10
55.150
22
11.420
54
3.095
86
1.038
118
0.412
150
0.187
–
9
52.250
23
10.920
55
2.982
87
1.006
119
0.401
Checking the fuses
Fuse locations:
■
Indoor unit:
See page 35 onwards.
■
Outdoor unit:
See page 44 onwards.
■
Fuse F1 is located on the mains terminal of the heat
pump control unit.
Fuse F3 is located on the main PCB.
■
The fuses for the fan and the refrigerant circuit con-
troller are located above the EEV PCB.
Fuse type:
■
6.3 A H (slow), 250 V~
■
Max. power loss
≤
2.5 W
1.
Switch OFF the power supply.
2.
Opening the wiring chamber.
Maintenance
Checking the temperature sensors
(cont.)
5831412
Maintenance
