Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 157

Diagnosis (service scans)
Posi- Display
tion
1 "0"
2 "1"
3 "0"
4 "0"
5 "4"
6 "9"
7 "0"
8 "0"
9 "0"
10 "1"
11 "0"
12 "2"
Fault index "Err" E
Position Code
Parts, fault messages reported directly from EEV controller
1 1
2
2 1
2
4
8
3 0
4 0
Messages
5 1
6 1
2
4
8
7 0
(cont.)
Codes Explanation (Tab. I)
(Tab. C)
0 —
1 Enable refrigerant circuit control
0 —
0 —
4 Refrigerant circuit control of heat pump control unit
enabled via digital input
1 Refrigerant circuit control of heat pump control unit
enabled via KM BUS
8 Compressor on
0 —
0 —
0 EEV controller hardware version 01
1
0 EEV controller software version 02
2
Explanation
LPG temperature sensor faulty
EEV stepper motor faulty
Low pressure sensor faulty
Suction gas temperature sensor faulty
High pressure sensor faulty
Hot gas temperature sensor faulty
N/A
N/A
Inadequate evaporation pressure (low pressure shutdown)
Condensation temperature too high
Condensation pressure too high
Suction gas superheating temperature too low
Suction gas superheating too high
N/A
Troubleshooting
157