Buderus Logano plus GB312 Installation And Service Instructions Manual page 56

10
Troubleshooting
1)
Type Display code Fault code
K 6A 577
V 6L 561
Table 23 Fault displays
1) V = interlocking; B = inhibiting; BC = operating code
56
Cause Description
No flame detected within Ionization current
the safety period. < 1.1 μA during safety
period.
5 power-up sequences The burner control unit
(power supply has switched off 5 times
disconnection during burner during the burner start-
start-up). up sequence.
Testing sequence/ Measure
Cause
Gas supply/dynamic If pressure too low,
pressure too low. inform gas company.
Install a gas pressure
The gas pressure regulator that is
regulator is not appropriate for the
appropriate for the required gas volume. If
required gas volume. necessary, notify the gas
supply company.
Install adequately
Inadequately sized gas dimensioned gas piping
line cross-sections (min.
cross-section of the gas
connector pipe).
Bleeding the gas supply
Air in gas pipe. pipe
Excessively high flue
Install properly
system backpressure
dimensioned and
through unfavorable
configured flue system.
layout (too many
diversions; cross-section
inadequate or too long;
horizontal sections too
long).
Clean or replace
Ignition/ionization
ignition/ionization
electrode dirty
electrode.
Establish good electrical
Check connecting cable contact. Replace cable if
between SAFe and necessary.
ionization electrode for
poor contact, breaks and
damage.
Check electrode gaps and Align burner rod or
ignition/ionization electrode. Replace
electrode for damage. defective electrode.
Check connecting cable
between ignition Establish good electrical
transformer and ignition contact
electrode for poor Replace cable if
contact (at electrode and necessary.
transformer), breaks and
damage.
SAFe burner control unit
defective.
Replace SAFe.
Ignition transformer
defective (delayed or
Replace ignition
non-existent spark,
transformer.
"violent" start-up)
Check the 120V power Reset burner control
supply to the control unit. unit.
Rectify power supply
problem.
Logano plus GB312 – 6 720 806 273 (2013/01)