Buderus Logano plus GB312 Installation And Service Instructions Manual page 59

1)
Type Display code Fault code
V CO 568
V CO 569
V CY 573
V CY 574
V LP 570
Table 23 Fault displays
1) V = interlocking; B = inhibiting; BC = operating code
Logano plus GB312 – 6 720 806 273 (2013/01)
Cause Description
Water pressure sensor fault Water pressure sensor
(cable break). break (voltage > 3.5 V).
Water pressure sensor fault Water pressure sensor
(short-circuit). short-circuit (voltage
< 0.5 V).
Flow temperature The control unit receives
unrealistic values from
< 23 °F (< -5 °C) (circuit
the supply temperature
break)
sensor.
Flow temperature The control unit receives
unrealistic values from
>266°F (>130°C) (short-
the supply temperature
circuit)
sensor.
Too many resets via the Too many resets have
interface. been received via the
interface within a certain
period.
Important: this fault can
be reset only by the
button on the SAFe.
Troubleshooting
Testing sequence/ Measure
Cause
Check connection Establish good electrical
between SAFe and water contact. Replace cable if
pressure sensor for poor necessary.
contact, breaks and
damage.
Check water pressure
sensor.
Replace water pressure
sensor.
Check connecting cable Rectify any short-
running to water pressure circuits.
sensor.
Replace water pressure
Check water pressure sensor.
sensor.
Check the connecting Replace connecting
cable between the SAFe cable if necessary.
and the return
Rectify contact problem
temperature sensor.
if necessary.
Check electrical
Replace temperature
connection of connecting
sensor is necessary.
cable to SAFe.
If temperature sensor
Check resistance levels of
resistances are correct
temperature sensor
but voltages incorrect,
against table
replace SAFe
Check voltage at
temperature sensor
terminals on SAFe against
table.
Check the connecting Replace connecting
cable between the SAFe cable if necessary.
and the return
Rectify contact problem
temperature sensor.
if necessary.
Check electrical
Replace temperature
connection of connecting
sensor is necessary.
cable to SAFe.
If temperature sensor
Check resistance levels of
resistances are correct
temperature sensor
but voltages incorrect,
against table
replace SAFe
Check voltage at
temperature sensor
terminals on SAFe against
table.
Faults have continually Identify and eliminate
been simply reset and not the cause of the problem
rectified. causing the resets.
There is a fault on the Replace BC10.
BC10 causing continual
Replace SAFe.
resets.
There is a malfunction on
the SAFe.
10
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