Viessmann VITOTRONIC 200 Service Instructions Manual page 140

Diagnosis
Refrigerant circuit
A B
Refrigerant circuit
116.5°
33.6bara
35.5°
100%
X
100%
W
tc:33.0°
V
26.1° 51.0°
Back with
U
Fig. 28 Refrigerant circuit in heating mode, heat gen-
eration at condenser
Pos. Refrigerant circuit in heating mode
Secondary circuit flow temperature in °C
A
Hot gas temperature in °C
B
Hot gas pressure in bar(a)
C
Value underlined:
Hot gas control active
D
—
Compressor output in %
E
Compressor
Animated symbol: Compressor is running.
When the refrigerant circuit is reversed the symbol appears turned by 180°.
Suction gas temperature in °C
F
Suction gas pressure in bar(a)
G
Value underlined:
Pressure control for suction gas active, max. oper-
ating pressure of evaporator (MOP) exceeded or
min. operating pressure of evaporator (LOP) un-
dershot
Refrigerant
H
Evaporator air intake temperature in °C
I
Fan
Animated symbol: Fan is running.
Fan speed in %
J
140
(cont.)
D
C E F G
-11.5°
70% 4.6bara
4.0K
5.0K
4.1K
5.5K
4.0K
P
4.1K
100%
100% 21.0° 100%
T S R Q N M
O
H
R410A
I
6.0°
65%
J
tO:
-4.0°
K
tO:-4.0°
10.0°
L
Refrigerant circuit reversal
Suction gas temperature in °C
Suction gas pressure in bar(a)
Value underlined:
Pressure control for suction gas active, max. oper-
ating pressure of evaporator (MOP) exceeded or
min. operating pressure of evaporator (LOP) un-
dershot
Suction gas superheating in K
Value highlighted white: Suction gas superheating,
set value in K
Value underlined: Superheating control for suction
gas active
Hot gas temperature in °C
Condensing pressure in bar(a)
Value underlined:
Hot gas control active