Viessmann VITOTRONIC 200 Service Instructions Manual page 78

Troubleshooting
Diagnosis (service scans)
Column L
Separate cooling circuit
20 Room temperature (requires
room temperature sensor)
18 Set room temperature
15 Flow temperature, separate cool-
ing circuit
10 Set flow temperature, cooling cir-
cuit (calculated from set room
temperature)
"Cooling circuit pump": Control
via connection sYA (see
page 150)
Mixer
Diagnosis "Refrigerant circ ctrllr" (not for Vitocal 200-S)
Refrigerant circuit control takes place via
the EEV controller, which communicates
permanently with the KM BUS.
The following information can be scan-
ned:
■ Status and fault information of the EEV
controller
■ Current refrigerant circuit temperature
and pressure values
■ Last temperatures, evaporation and
condensation pressures captured via
the EEV controller
■ Compressor hours run for the various
load classes. A load class specifies the
compressor operation at a certain dif-
ferential of evaporation and conden-
sation temperature ΔT
Service menu:
1. Press OK + å simultaneously for
approx. 4 s.
2. "Diagnosis"
78
(cont.)
.
V/K
3. "Heat pump"
4. "Refrigerant circ ctrllr" for single
stage heat pump.
"Refrigerant circ ctrllr 1" for heat
pump stage 1.
"Refrigerant circ ctrllr 2" for heat
pump stage 2.
Note
The information displayed in "Refriger-
ant circ ctrllr" is independent of the con-
trol unit fault codes (see page 36).
Refrigerant circuit controller
Ü
[ - ] :
[ °C ] :
Tsh, Tc
[ bara ] :
pmop
[ °C ] :
Ts, Tc
[ bara ] :
ps, pc
[ °C ] :
T1
[ % ] :
w, P
[ - ] :
Err
Back with
0100 4000 0101
3.0, 68.0
15
-1.8, 60.3
6.95, 21.8
31.4
58 , - - -
00000001
ä