Viessmann Pt500A (Marked Green); Checking Mcb/Fuses; Fan; Heat Pump Control Unit - Viessmann Vitocal 300-A Installation And Service Instructions Manual
Air/water heat pump with electric drive, 400 v~
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Also See for Vitocal 300-A:
- Installation and service instructions manual (212 pages) ,
- Installation and service instructions for contractors (124 pages) ,
- Operating instructions manual (60 pages)
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Maintenance
Checking sensors
Viessmann Pt500A (marked green)
860
780
700
620
540
460
-20
20
60
Temperature in °C
Fig. 53
Checking MCB/fuses
Fan
For fuse location: see page 23.
Heat pump control unit
For fuse locations: see page 29 onwards.
Fuse F1 is located on the mains terminal of the heat
■
pump control unit.
■
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
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.
66
(cont.)
100
140
180
The 6.3 A H (slow) MCB/fuse is located at the mains
terminals of the fan.
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