Viessmann VITOCAL 151-A Installation And Service Instructions Manual page 118

Troubleshooting
Further messages
Message code
S.115
S.116
S.117
S.118
S.120
S.121
S.122
S.123
S.124
S.125
S.126
S.127
S.128
S.129
S.130
S.131
S.132
S.133
S.134
S.135
S.136
S.161
S.162
S.163
S.164
S.165
S.167
S.176
S.186
S.187
S.188
S.189
Information
Message code
I.9
I.10
I.56
I.57
I.59
I.63
I.70
I.71
I.72
I.73
118
(cont.)
Meaning
4/3-way valve in position DHW heating
4/3-way valve in position heating/cooling circuit 1
4/3-way valve in position heating/cooling circuit 2
4/3-way valve in position internal buffer cylinder/bypass
Smart grid: Standard mode activated
Smart grid: Recommended mode activated
Smart grid: Forced mode activated
Heat pump off
Heat pump pre-run phase
Heat pump heating
Heat pump cooling
Prepare heat pump defrost
Heat pump defrosting
Heat pump run-on phase
Electric booster heater off
Electric booster heater: Level 1 active
Electric booster heater: Level 2 active
Electric booster heater: Level 3 active
4/3-way valve idle
4/3-way valve defrosting
4/3-way valve room heating/cooling
Filling in progress
Venting in progress
Heat pump: System status inactive
Heat pump: System status maintenance standby
Heat pump: System status control
Actuator test active
Heat pump control unit: Defrost demand issued
Frost protection DHW cylinder active
Frost protection heat pump active
Frost protection heating water buffer cylinder active
Frost protection integral heating water buffer cylinder active
Meaning
Screed drying active
DHW heating runtime limit
External demand active
External blocking active
Parameters were restored: Parameter set was flashed to electronics module.
Cooling circuit not ready
Inverter: Excess current detected in power grid
Inverter: Overvoltage detected in power grid
Inverter: Undervoltage detected in power grid
Inverter: Overvoltage detected in DC intermediate circuit