Buderus Logano plus GB402 Installation And Maintenance Instructions Manual page 66

10
Troubleshooting
Display Fault
1)
Type code code
V LL 571
V EE 601
V EE 612
V EE 613
Tab. 21 Fault displays
1) V = interlocking; B = blocking
66
Cause Description
Too many 15 restarts
restarts occurred in direct
despite resets. 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 Successive
temperature measurements of
sensor the flow
measurement. temperature
deviate severely
from each other.
Return Successive
temperature measurements of
sensor the return
measurement. temperature
deviate severely
from each other.
Flow Successive
temperature measurements of
sensor the flow
measurement. 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
theflow temperature
sensor.
Logano plus GB402 - Subject to technical modifications!
Action
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.