Operating instructions

66
Heat pump module diagnosis
As part of the heat pump module diagnosis, the compressor hours run can be scan-
ned for different load classes.
A load class specifies the compressor operation at a certain differential of evaporation
and condensation temperature ΔT
V/K
.
Compressor runtime (hours run
according to load classes)
Select with
230h
Runtime compressorÜ
1
Load class
3 4 5
h
(
Runtime
?
Service menu:
1. Press OK + å simultaneously for
approx. 4 s.
2. "Diagnosis"
3. "Heat pump"
4. "Runtime compressor"
The compressor hours run ("Hours
run") can be scanned with for every
"Load class".
Assigning the load classes:
Load class Hours run for ΔT
V/K
1 ΔT
V/K
< 25 K
2 25 K < ΔT
V/K
< 32 K
3 32 K < ΔT
V/K
< 41 K
4 41 K < ΔT
V/K
< 50 K
5 ΔT
V/K
> 50 K
ΔT
V/K
Differential, evaporation and con-
densation temperature
Brief scan
In the brief scan, you can scan temperatures, software versions and connected com-
ponents, for example.
Service menu:
1. Press OK + å simultaneously for
approx. 4 s.
2. "Diagnosis"
3. "Brief scan"
Brief scan
Select with (
Ü
2:
1:
3:
4:
0
0
0
1 F
0
0
0 0
0
0
0 A
0
0
0 0
0
0
1 2
0
0
0
Troubleshooting
Diagnosis (service scans)
(cont.)
5441 603 GB