Viessmann VITOTRONIC 200 Service Instructions Manual page 86

Troubleshooting
Diagnosis (service scans)
Display Explanation
tpe °C Brine inlet/air intake temperature
tpa °C Brine outlet/air discharge temperature
tse °C Secondary circuit return temperature
tsa °C Secondary circuit flow temperature
p0 bara Evaporation pressure
pc bara Condensation pressure
Err/Msg Last fault information code before a compressor shutdown; display
system (see page 79) and explanation (see page 82) as before.
Diagnosis "Runtime compressor"
Service menu:
1. Press OK + å simultaneously for
approx. 4 s.
2. "Diagnosis"
3. "Heat pump"
4. "Runtime compressor" for single
stage heat pump.
"Runtime compressor 1" for heat
pump stage 1.
"Runtime compressor 2" for heat
pump stage 2.
Runtime compressor
Ü
h
Load class
1
Runtime
Select with
Diagnosis "External unit" (only Vitocal 200-S)
All components of the refrigerant circuit,
including the refrigerant circuit control
unit, are located in the external unit (not
the condenser). The refrigerant circuit
control unit communicates with the heat
pump control unit via data bus.
86
(cont.)
3 4 5
?
230h
The compressor hours run ("Hours
run") can be scanned with
"Load class".
Assigning the load classes:
Load class Hours run for ΔT
1 ΔT
2 25 K < ΔT
3 32 K < ΔT
4 41 K < ΔT
5 ΔT
ΔT Differential between evaporation
V/K
and condensation temperature
The following information can be scan-
ned:
■ Status and fault information concern-
ing the refrigerant circuit control unit.
■ Current refrigerant circuit values and
control parameters.
for every
V/K
< 25 K
V/K
< 32 K
V/K
< 41 K
V/K
< 50 K
V/K
> 50 K
V/K