Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 158

Troubleshooting
Diagnosis (service scans)
Position Code
8 1
2
Example:
Information index "0C 00 00 00"
Posi- Display
tion
1 "0"
2 "C"
3 "0"
4 "0"
5 "0"
6 "0"
7 "0"
8 "0"
Temperature and pressure values
Most recent temperature and pressure values captured in primary and secondary
circuits.
Note
While the compressor is running, the
control unit in this overview displays the
current test values. After the compressor
has shut down, the last values measured
during operation can be called up. These
values are only overwritten when the
compressor starts again.
158
(cont.)
Explanation
Maximum operating pressure (MOP) was reached; control type
(superheating/evaporation pressure control) in refrigerant cir-
cuit was adjusted.
Fault due to impermissible combination of refrigerant circuit
conditions. A serious EEV controller fault has occurred, as the
heat pump control unit only transfers permissible parameter
combinations to the EEV controller.
Codes Explanation (Tab. E)
(Tab. C)
0 —
4 High pressure sensor faulty, reported directly from
EEV controller
8 Hot gas temperature sensor faulty, reported
directly from EEV controller
0 —
0 —
0 —
0 —
0 —
0 —
Single stage (type BW)
EEV module (last run)
Ü
tpe °C : 19.8
tpa °C : 11.3
tse °C : 22.2
tsa °C : 31.5
p0 bara :
pc bara : 14.1
Err/Msg : 00000001
Back with
6.2
ä