Viessmann VITOCAL 250-A - Page 128

128
Measures
1. Isolate the system from the power supply. Wait at
least 2 min. Switch on the system.
2. Check all connections to the compressor:
■
Check wires and plugs for correct seating.
■
Check connections for contact corrosion.
■
Check cables for mechanical damage, e.g. crush-
ing, kinking, chafing or breakage.
Replace cable if necessary.
3. Check phase connections for compressor for clock-
wise rotating field.
4. Replace inverter.
F.831 Fault, current sensor, power factor correction filter (PFC) inverter
F.831
System characteristics
Refrigerant circuit off: Inverter and compressor cannot
be switched on.
Cause
Inverter current sensor fault
Measures
1. Check all connections to the compressor:
■
Check wires and plugs for correct seating.
■
Check connections for contact corrosion.
■
Check cables for mechanical damage, e.g. crush-
ing, kinking, chafing or breakage.
Replace cable if necessary.
2. Check phase connections for compressor for clock-
wise rotating field.
3. Isolate the system from the power supply. Wait at
least 2 min. Switch on the system.
4. Replace inverter.
F.832 Inverter temperature sensor (IPM) faulty
F.832
System characteristics
Refrigerant circuit off: Inverter and compressor cannot
be switched on.
Cause
Faulty inverter temperature sensor (IPM)
Measures
1. Isolate the system from the power supply. Wait at
least 2 min. Switch on the system.
2. Replace inverter.
F.833 Fault, temperature sensor, power factor correction filter (PFC) inverter
F.833
System characteristics
Refrigerant circuit off: Inverter and compressor cannot
be switched on.
Cause
Faulty inverter temperature sensor (PFC)
Messages
Fault messages (cont.)
6218234
Diagnosis