Viessmann VITOTRONIC 200 Service Instructions Manual page 142

Diagnosis
Refrigerant circuit
A B
Refrigerant circuit
82.9°/
25.8°
Z 100%
100%
Y
tc:47.9°
X
25.1°
Back with
W
Fig. 29 Refrigerant circuit in heating mode, heat gen-
eration at condenser
Pos. Refrigerant circuit in heating mode
Secondary circuit flow temperature upstream of the instantaneous heating water heater in °C
A
Hot gas temperature (upstream of condenser) in
B
°C
Hot gas temperature (downstream of compressor)
C
in °C
Condensing pressure in bar(a)
D
Compressor output in %
E
Temperature, refrigerant circuit controller
F
Compressor
Animated symbol: Compressor is running.
■
When the refrigerant circuit is reversed the symbol appears turned by 180°.
■
Suction gas temperature (upstream of compres-
G
sor) in °C
Suction gas pressure in bar(a)
H
Value underlined: Pressure control for suction gas
is active, set suction gas pressure in bar(a)
Suction gas temperature (downstream of evapora-
K
tor) in °C
Air intake temperature in °C
L
R410A Refrigerant
Fan
Animated symbol: Fan is running.
Speed, fan 1 (top) in %
M
Speed, fan 2 (bottom) in %
N
"t0:" Evaporation temperature in °C
O
—
142
(cont.)
C D E F
83.2° 14.9°
56%
29.2bara
4.9K
7.3K
9.1K
5.1 25%
V U T S R Q
G H K L
R410A
10.2° /8.7°
8.3bara
19.7°
5.0K
86% M
7.6K
81%
N
tO:1.1°
O
P
Refrig. circ reversal
Suction gas temperature in °C
Suction gas temperature (upstream of compressor)
in °C
Suction gas pressure in bar(a)
Value underlined: Pressure control for suction gas
is active, set suction gas pressure in bar(a)
Hot gas temperature (downstream of compressor)
in °C
Condensing pressure in bar(a)
Hot gas temperature in °C
"tc:" Condensing temperature in °C
Symbol flashes: Defrost active