Viessmann VITOCAL 111-S - Page 88

88
Danger
Contact with live components can lead to seri-
ous injury from electric current. Some compo-
nents on PCBs remain live even after the power
supply has been switched off.
■
When working on the outdoor unit, isolate the
system from the power supply, e.g. at a sepa-
rate MCB/fuse or a mains isolator. Check the
system is no longer live and safeguard against
reconnection.
■
Prior to working on the appliance, wait at least
4 min until the voltage on the charged capaci-
tors has completely dropped out.
Outdoor unit with 1 fan: Types 111.B04 to 111.B06
RSTU
A
H
L
K
O
N
P
G
F
C
E
D
B
M
Fig. 72
A
Air inlet temperature sensor (outdoor, RT15)
B
High pressure sensor
C
4-way diverter valve
D
Suction gas temperature sensor (suction, RT17)
Maintenance
Outdoor unit: Overview of internal components
6199592
Maintenance