Viessmann VITOCAL 151-A Installation And Service Instructions Manual page 108

Troubleshooting
Fault messages
(cont.)
Message code System characteristics
F.832 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.833 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.834 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.835 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.836 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.837 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.838 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.839 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.841 Compressor running uneven-
ly.
F.843 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.845 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
F.846 Refrigerant circuit off: Inverter
and compressor cannot be
switched on.
108
Cause
Inverter temperature sen-
sor faulty
Inverter temperature sen-
sor faulty
Power supply on inverter
faulty
Unsuitable inverter or in-
verter incorrectly program-
med
Overvoltage fault on inver-
ter
Power supply on com-
pressor faulty
Control of inverter faulty
Compressor blocked
Excessive compressor
■
torque
Compressor power con-
■
sumption high
Overvoltage shutdown, in-
verter
Unsuitable inverter or in-
verter incorrectly program-
med
Compressor rotating field
counter-rotating
Measures
Isolate the system from the power
supply. Restart the system.
If the fault persists, replace the in-
verter.
Isolate the system from the power
supply. Restart the system.
If the fault persists, replace the in-
verter.
Check the power supply of the out-
door unit (compressor power sup-
ply).
If the fault persists, contact the
power supply utility.
Consult Viessmann Technical
Service.
Check power connection on
■
compressor.
If the fault persists, replace the
■
inverter.
If the fault persists, replace the
■
compressor.
Check the electrical connection
■
between inverter and compres-
sor.
If the fault persists, replace the
■
inverter.
Issue new demand to compres-
■
sor.
If the fault occurs frequently, re-
■
place the inverter.
Issue new demand to compres-
■
sor.
If the fault occurs frequently, re-
■
place the compressor.
Issue new demand to compres-
■
sor.
If the fault occurs frequently, re-
■
place the compressor.
Issue new demand to compres-
■
sor.
If the fault persists, replace the
■
compressor.
Isolate the system from the power
supply. Restart the system.
If the fault persists, replace the in-
verter.
Refer to type plate and order No.
to check whether correct part was
delivered and installed.
If the fault persists, replace the in-
verter.
Check phase connections on in-
■
verter.
Check compressor power supply.
■