Viessmann VITOCAL 151-A Installation And Service Instructions Manual page 103
Air source heat pump, monoblock version for heating and cooling operation, with 1 integrated heating/cooling circuit
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Also See for VITOCAL 151-A:
- Operating instructions for the system user (60 pages) ,
- Manual (24 pages)
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Fault messages
(cont.)
Message code
System characteristics
F.546
Mixer closes. Heating circuit
pump is operational.
F.547
Mixer closes. Heating circuit
pump is operational.
F.548
Mixer closes. Heating circuit
pump is operational.
F.549
Mixer closes. Heating circuit
pump is operational.
F.623
Mixer closes. Heating circuit
pump switches off.
F.624
Mixer closes. Heating circuit
pump switches off.
Cause
Lead break, flow tempera-
ture sensor, heating/cool-
ing circuit 3 with mixer
Or
Wrong setting during com-
missioning
Short circuit, flow temper-
ature sensor, heating/cool-
ing circuit 3 with mixer
Lead break, flow tempera-
ture sensor, heating/cool-
ing circuit 4 with mixer
Or
Wrong setting during com-
missioning
Short circuit, flow temper-
ature sensor, heating/cool-
ing circuit 4 with mixer
Lead break, return tem-
perature sensor
Short circuit, return tem-
perature sensor
Troubleshooting
Measures
Check the settings in the com-
■
missioning assistant. Adjust set-
tings if required.
Check setting of rotary switch on
■
ADIO electronics module.
Check flow temperature sensor
■
in heating/cooling circuit 3.
Check resistance value
■
(NTC 10 k
) at the sensor input
Ω
on ADIO electronics module. Re-
place sensor if required.
Check the settings in the com-
■
missioning assistant. Adjust set-
tings if required.
Check setting of rotary switch on
■
ADIO electronics module.
Check flow temperature sensor
■
in heating/cooling circuit 3.
Check resistance value
■
(NTC 10 k
) at the sensor input
Ω
on ADIO electronics module. Re-
place sensor if required.
Check the settings in the com-
■
missioning assistant. Adjust set-
tings if required.
Check setting of rotary switch on
■
ADIO electronics module.
Check flow temperature sensor
■
in heating/cooling circuit 4.
Check resistance value
■
(NTC 10 k
) at the sensor input
Ω
on ADIO electronics module. Re-
place sensor if required.
Check the settings in the com-
■
missioning assistant. Adjust set-
tings if required.
Check setting of rotary switch on
■
ADIO electronics module.
Check flow temperature sensor
■
in heating/cooling circuit 4.
Check resistance value
■
(NTC 10 k
) at the sensor input
Ω
on ADIO electronics module. Re-
place sensor if required.
Check the settings in the com-
■
missioning assistant. Adjust set-
tings if required.
Check resistance value
■
(NTC 10 k
) at mixer extension
Ω
kit. Replace sensor if required.
Check the settings in the com-
■
missioning assistant. Adjust set-
tings if required.
Check resistance value
■
(NTC 10 k
) at mixer extension
Ω
kit. Replace sensor if required.
103
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