Buderus Logano plus GB402 Installation And Maintenance Instructions Manual page 62

10
Troubleshooting
Display Fault
1)
Type code code
B 6A 577
V 6L 561
Tab. 21 Fault displays
1) V = interlocking; B = blocking
62
Cause Description
No flame Ionisation current
within the within the safety
safety time. time < 1.1 μA.
"Power up" The burner control
5 times unit was switched
(power off 5 times during
interruption the burner start.
during burner
start).
Test procedure/cause
Gas supply pressure too
low.
The gas governor is not
adjusted to the required
gas volume.
Inadequately sized gas line
cross-sections (min. cross-
section of the gas supply
pipe).
Air in the gas line.
Excessively high flue
system backpressure
through unfavourable layout
(too many diversions;
cross-section inadequate or
too long; horizontal
sections too long).
Ignition/ionisation electrode
contaminated.
Check cabling between the
SAFe and the ionisation
electrode for contact
separation, breaks and
damage.
Check electrode gaps and
ignition/ionisation electrode
for damage.
Check cabling between the
ignition transformer and
ignition electrode for
contact separation (on
electrode and transformer),
breaks and damage.
SAFe burner control unit
faulty.
Ignition transformer faulty
(no or delayed ignition
spark, "hard start").
Check the 230 V power
supply to the control unit.
Logano plus GB402 - Subject to technical modifications!
Action
Notify gas supply utility if
the supply pressure is
too low.
Install gas governor that
is adjusted to the
required gas volume or,
if necessary, notify gas
supply utility.
Install adequately sized
gas lines.
Vent the gas line.
Size and route the flue
system correctly.
Clean or replace
ignition/ionisation
electrode.
Make the contacts
correctly. Replace cable
if required.
Align burner rod or
electrode. Replace
faulty electrode.
Make the contacts
correctly. Replace cable
if required.
Replace the SAFe.
Replace the ignition
transformer.
Reset burner control
unit.
Remedy problem with
the power supply.