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10 Troubleshooting
Logano plus GB402 – 6 720 804 428 (2012/09)
51
V LL 571 Too many restarts
despite resets.
15 restarts occurred in
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.
Faults have been repeatedly reset
but not removed.
Identify the cause for the faults
that have resulted in the resets
and remove them.
V EE 601 Flow temperature
sensor
measurement.
Successive
measurements of the
flow temperature
deviate severely from
each other.
Check the boiler sensor lead. Replace in case of damage.
Clean or replace if
contaminated.
Check the plug-in connection. Refit plug it is found to be
loose.
Check sensor values according to
table.
Replace the temperature
sensor in case of deviations.
Check the voltage at the
temperature sensor according to
table.
Replace the SAFe in case of
deviations.
V EE 612 Return
temperature
sensor
measurement.
Successive
measurements of the
return temperature
deviate severely from
each other.
Check the boiler sensor lead. Replace in case of damage.
Clean or replace if
contaminated.
Check the plug-in connection. Refit plug it is found to be
loose.
Check sensor values according to
table.
Replace the temperature
sensor in case of deviations.
Check the voltage at the
temperature sensor according to
table.
Replace the SAFe in case of
deviations.
V EE 613 Flow temperature
sensor reading
Successive
measurements of the
flow temperature
deviate severely from
each other.
Check resistance value of the flow
temperature sensor.
Replace flow temperature
sensor in case of deviations.
Type
1)
Display
code
Fault code Cause Description Test procedure/cause Correction
Tab. 22 Fault displays
1) V = locking; B = blocking
51


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