Viessmann VITOCAL 250-A - Page 189

189
Message Meaning
I.76 Inverter:
■
Temperature too high in power factor correction filter (PFC)
■
Compressor temporarily off
Measures:
1. If the message appears often, check the inverter. Replace if necessary.
I.77 Inverter:
■
Current too high in power factor correction filter (PFC)
■
Compressor temporarily off
Measures:
1. If the message appears often, inform Viessmann Technical Service.
I.78 Inverter:
Output reduction by inverter if output demand is too high (derating)
I.79 Inverter:
■
Output reduction by inverter if output demand from compressor is too high (derating)
Measures:
1. Check the compressor bearings for sufficient lubrication.
2. Check the compressor for noise.
I.80 Inverter:
■
Output restriction by inverter if output demand from compressor is too high (field weakening opera-
tion)
■
No action required
I.81 Inverter:
Output reduction by inverter if temperature at internal power module is too high (derating)
I.82 Inverter:
■
Output reduction by inverter if temperature at power factor correction filter is too high (derating)
Measures:
1. Check for sufficient airflow to cool the inverter.
2. Check inverter heat sink and fan for dirt.
3. Check temperature at the interior temperature sensor.
I.83 4/3-way valve:
Minimum flow rate reached
I.84 4/3-way valve:
Min. return temperature reached
I.85 Controlled low pressure shutdown, refrigerant circuit
I.86 Controlled high pressure shutdown, refrigerant circuit
I.89 Clocks forward (summertime)
I.90 Clocks back (wintertime)
I.92 Reset energy statement
I.96 Unknown lag heat pump (additional Viessmann appliance)
I.98 New lag heat pump (additional Viessmann appliance) recognised.
I.99 Hygiene function target temperature reached
I.100 Max. condensing pressure reached
I.101 Min. evaporation pressure for heating mode reached
I.102 Min. evaporation pressure for cooling mode reached
I.103 Max. evaporation pressure reached
I.104 Max. hot gas temperature reached
I.105 Max. runtime lower evaporation temperature reached
I.106 Max. compressor pressure differential reached
Messages
Information messages (cont.)
6218234
Diagnosis