37
Pos.
Refrigerant circuit in heating mode
L
Suction gas superheating in K
Value highlighted white: Set suction gas super-
heating in K
Value underlined: Suction gas superheating
control active
Electronic expansion valve:
Refrigerant circuit in heating mode, heat gener-
ation at condenser
Pos.
Refrigerant circuit in heating mode
M
Electronic expansion valve opening in %
N
Liquid gas temperature in °C
P
Secondary circuit return temperature in °C
Q
Condensing temperature in °C
Secondary pump: Not connected
Animated symbol: Signal output is being
switched.
Compressor travel
The diagram consisting of evaporation and condensing
temperatures shows the compressor runtimes.
The area of the diagram is divided into a rectangular
grid. While the compressor is running, the operating
point of the refrigerant circuit moves through this grid.
The control unit constantly adds the dwell times "trun"
of the operating point in the individual grid fields.
Depending on the dwell time, the grid is shown in vari-
ous shades of grey:
■
trun = 0 min: Black
■
0 < trun
≤
240 min: 6 different shades of grey
■
trun > 240 min: White
Based on the compressor application limits shown, it is
possible to see whether and how often the application
limits of the refrigerant circuit parameters have been
exceeded during operation.
1. Service menu:
Press
OK
+
å
simultaneously and hold for
approx. 4 s.
2. "Diagnosis"
3. "Refrigerant circuit"
4. "Compressor travel"
Select with
-30
30
to
0
-10
-20
10
20
10
tc
70
50
30
to: 8
tc: 50
trun: 240 min.
A
Fig. 16
Note
The compressor application limits are shown by way of
an example. The actual application limits differ from
this diagram.
A
Compressor application limits
t0
Evaporation temperature
tc
Condensing temperature
trun Compressor runtime for currently selected grid
field
Calculating runtimes
1.
Use / to position the cursor (crosshairs) at the
required place in the diagram.
2.
Read off the values in the top line.
Compressor path
The diagram of the evaporation and condensing tem-
perature shows the movement of the refrigerant circuit
operating point (compressor path) for the last hour run.
The compressor application limits pictured in the dia-
gram show whether, and how often, the application
limits of the refrigerant circuit parameters have been
exceeded in the last hour run.
1. Service menu:
Press
OK
+
å
simultaneously and hold for
approx. 4 s.
2. "Diagnosis"
3. "Refrigerant circuit"
4. "Compressor path"
Diagnosis
Refrigerant circuit
(cont.)
5800 917 GB
Diagnosis
