Buderus Logano plus GB402 Installation And Maintenance Instructions Manual page 51

Display
1)
Type code Fault code
V LL 571
V EE 601
V EE 612
V EE 613
Tab. 22 Fault displays
1) V = locking; B = blocking
Logano plus GB402 – 6 720 804 428 (2012/09)
Cause Description
Too many restarts 15 restarts occurred in
despite resets. direct succession. This
means that the same
problem persisted after
the resets.
Please note: this fault
can only be reset via
the button on the SAFe.
Flow temperature Successive
sensor measurements of the
measurement. flow temperature
deviate severely from
each other.
Return Successive
temperature measurements of the
sensor return temperature
measurement. deviate severely from
each other.
Flow temperature Successive
sensor reading measurements of the
flow temperature
deviate severely from
each other.
Test procedure/cause
Faults have been repeatedly reset
but not removed.
Check the boiler sensor lead.
Check the plug-in connection.
Check sensor values according to
table.
Check the voltage at the
temperature sensor according to
table.
Check the boiler sensor lead.
Check the plug-in connection.
Check sensor values according to
table.
Check the voltage at the
temperature sensor according to
table.
Check resistance value of the flow
temperature sensor.
Troubleshooting 10
Correction
Identify the cause for the faults
that have resulted in the resets
and remove them.
Replace in case of damage.
Clean or replace if
contaminated.
Refit plug it is found to be
loose.
Replace the temperature
sensor in case of deviations.
Replace the SAFe in case of
deviations.
Replace in case of damage.
Clean or replace if
contaminated.
Refit plug it is found to be
loose.
Replace the temperature
sensor in case of deviations.
Replace the SAFe in case of
deviations.
Replace flow temperature
sensor in case of deviations.
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