Buderus LOGANO PLUS GB312 Installation Instructions Manual page 60

10
Troubleshooting
Display
1)
Type code Fault code
L CO 569
L CY 573
L CY 574
L LP 570
L LL 571
Table 22 Fault messages
1) V = locking; B = inhibiting; BC = operating code
60
Cause Description
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)
the flow temperature
(circuit break)
sensor.
Flow temperature The control unit receives
unrealistic values from
>266°F (>130°C)
the flow temperature
(short 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
only be reset by the
button on the SAFe.
Too many restarts despite 15 directlly consecutive
resetting. restarts have taken
place. In other words,
the same problem was
still present after
resetting.
Important: this fault can
only be reset by the
button on the SAFe.
Testing sequence/
Cause Measure
Check connecting lead to Rectify any short
water pressure sensor. circuits.
Check water pressure Replace water pressure
sensor. sensor.
Check cabling between Replace connecting lead
SAFe and return sensor. if necessary
Check electrical Rectify any contact
connection of connecting problems
lead to SAFe.
Check resistance levels of Replace temperature
temperature sensor sensor if necessary
against table
Check voltage at If temperature sensor
temperature sensor resistances are correct
terminals on SAFe against but voltages incorrect,
table replace SAFe
Check cabling between Replace connecting lead
SAFe and return sensor. if necessary
Check electrical Rectify any contact
connection of connecting problems
lead to SAFe.
Check resistance levels of Replace temperature
temperature sensor sensor if necessary
against table
Check voltage at If temperature sensor
temperature sensor resistances are correct
terminals on SAFe against but voltages incorrect,
table replace SAFe
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
resets.
There is a malfunction on Replace SAFe.
the SAFe.
Faults have continually Identify and eliminate
been simply reset and not the cause of the problem
rectified. causing the resets.
Logano plus GB312 – 6 720 647 367 (2012/11)