Outdoor Unit: Ntc 50 K Ω; Checking The Fuses; (Without Id) - Viessmann Vitocal 200-S Installation And Service Instructions For Contractors

Maintenance
Checking the temperature sensors
Outdoor unit: NTC 50 k
1000
100
10
1
0.1
-30 -20 -10
Temperature in °C
Fig. 62

Checking the fuses

For fuse locations: see page 25 onwards.
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
■ ≤
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.
70
(cont.)

(without ID)

Ω
0 10 20 30 40 50 60 70 80 90
Fuse F101:
1.0 A (slow, L)
■
■ Max. power loss 2.5 W
≤
100