Troubleshooting; Overview Of Electrical Components - Viessmann Vitocal 300-G Pro SPS Installation And Service Instructions For Contractors

Repairs

Overview of electrical components

See from page 29.
Overview of internal components, type BW 301.BS090 to BW 302.BS250
432 6 qP 9 qW
qU qR qTqZ
Fig.60
1 Wiring chamber
Safety high pressure switch, high pressure 1 (stage 1)
2
Only type BW 302.B090, BW 302.B120, BW 302.B150, BW 302.B180 and BW 302.B250:
3
Safety high pressure switch, high pressure 2 (stage 2)
High pressure sensor EEV
4
Suction gas temperature sensor EEV
5
Low pressure sensor EEV
6
Liquid gas temperature sensor EEV
7
8 Electronic expansion valve EEV
Only type BW 302.B090, BW 302.B120, BW 302.B150, BW 302.B180 and BW 302.B250:
9
Hot gas temperature sensor/compressor 2 (stage 2)
Only type BW 302.B090, BW 302.B120, BW 302.B150, BW 302.B180 and BW 302.B250:
qP
Compressor 2 (stage 2)
Hot gas temperature sensor/compressor 1 (stage 1)
qQ
Compressor 1 (stage 1)
qW
Sight glass, oil level, compressor 1 and 2
qE
Secondary circuit return temperature sensor
qR
qT Filter dryer
Only type BW 302.B090, BW 302.B120, BW 302.B150, BW 302.B180 and BW 302.B250:
qZ
Second parallel filter dryer
Condenser
qU
Evaporator
qI
Primary circuit return temperature sensor (heat pump brine outlet)
qO
Secondary circuit flow temperature sensor
wP
Primary circuit flow temperature sensor (heat pump brine inlet)
wQ
wW Secondary circuit return temperature sensor
qW qQ
wQ
3
1
2
wP
qT
qZ
qU
qE
4
6
5
7
8
qI
qO
wW

Troubleshooting

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