93
Viessmann Pt500A (marked green)
460
20
540
100
Resistance in
Temperature in °C
60
140 180
620
700
780
860
-20
Checking MCB/fuses
Fuse arrangement (see page 36):
■ Fuse F1 is located on the cross con-
nect PCB.
■ Fuse F3 is located on the main PCB.
Fuses F1 and F3:
■ 6.3 A (slow), 250 V~
■ Max. power loss ≤ 2.5 W
Danger
Contact with 'live' components
can lead to serious injury from
electric current.
Before working on the equip-
ment, ensure that
the power cir-
cuit is also at zero volt.
Removing fuses does
not switch
the power circuit to zero volt
.
Appliance too noisy
Possible causes:
■ Transport bracket not removed: See
■ Hose outlets in diaphragm grommets
not watertight: See page 69.
■ Casing door not tightly sealed: See
Troubleshooting
Repairs
(cont.)
5546 273 GB
Service
Содержание BW 351.A07
Страница 28: ...28 Removing the top panel 1 Installation sequence Siting the heat pump cont 5546 273 GB ...
Страница 88: ...88 Opening the casing door Troubleshooting Repairs cont 5546 273 GB ...
Страница 90: ...90 D C Q R S V K X P F J U T X Q S T R D Y W Type BWC 351 A07 Troubleshooting Repairs cont 5546 273 GB ...