69
External unit: NTC 50 k
Ω
(without ID)
0.1
1
10
100
1000
Resistance
in kΩ
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
Temperature in °C
Fig. 62
Checking fuses
Fuse location: See from page 24.
■
Fuse F1 is located on the mains terminal of the heat
pump control unit.
■
Fuse F3 is located on the main PCB.
■
Fuse F101 is located on the AVI PCB.
Fuses F1 and F3:
■
6.3 A (slow, H), 250 V~
■
Max. power loss
≤
2.5 W
Fuse F101:
■
1.0 A (slow, L)
■
Max. power loss
≤
2.5 W
Danger
Removing the fuse 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.
Maintenance
Checking the sensors
(cont.)
5700 542 GB
Maintenance
