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10 Troubleshooting
Logano plus GB402 – 6 720 804 428 (2012/09)
50
V CY 573 Flow temperature
<-C
(interruption)
The control unit
receives unrealistic
values from the flow
temperature sensor.
Check cabling between SAFe and
flow temperature sensor.
Replace cable if required.
Check electrical connection of the
SAFe cable.
Remedy contact problem if
required.
Check resistance values of
temperature sensor according to
table.
Replace temperature sensor if
required.
Check voltage at the temperature
sensor terminals inside the SAFe
according to table.
Replace SAFe if resistance
values of the temperature
sensor are correct, but voltage
values are incorrect.
V CY 574 Flow temperature
> 130 °C (short
circuit)
The control unit
receives unrealistic
values from the flow
temperature sensor.
Check cabling between SAFe and
flow temperature sensor.
Replace cable if required.
Check electrical connection of the
SAFe cable.
Remedy contact problem if
required.
Check resistance values of
temperature sensor according to
table.
Replace temperature sensor if
required.
Check voltage at the temperature
sensor terminals inside the SAFe
according to table.
Replace SAFe if resistance
values of the temperature
sensor are correct, but voltage
values are incorrect.
V LP 570 Too many resets
via the interface.
Too many resets were
carried out via the
interface within a
certain period.
Please note: this fault
can only be reset via
the button on the SAFe.
Faults have been repeatedly reset
but not removed.
Identify the cause for the faults
that have resulted in the resets
and remove them.
The BC10 has developed a fault
causing constant resets.
BC10 Replace.
The SAFe has developed a fault. Replace the SAFe.
Type
1)
Display
code
Fault code Cause Description Test procedure/cause Correction
Tab. 22 Fault displays
1) V = locking; B = blocking
50


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