Overview Of Electrical Components - Viessmann VITOCAL 300-G Installation And Service Instructions For Contractors

Maintenance
Opening the casing door
Open the casing door: See chapter "Removing the
heat pump module" on page 13.

Overview of electrical components

E
D
C
B
A
Fig. 42
Inverter
A
EEV PCB (refrigerant circuit controller)
B
Main PCB (MB 761)
C
Controller and sensor PCB (CU 401)
D
Luster terminals: Connections N and
E
Strain relief fittings
F
Luster terminals: Message and safety connections
G
64
Mains terminals for instantaneous heating water
H
heater (left) and compressor (right)
Heat pump control unit power supply
K
Expansion PCB (SA 135) on main PCB
L
Mains filter, inverter
M
Switching module for instantaneous heating water
N
heater
F
G
H
K
L
M
N