10
Troubleshooting
Logano plus GB312 – 6 720 806 273 (2013/01)
55
K
5L
543
No communication with
SAFe.
The MC10 is not
receiving any data from
the SAFe.
Check whether the plugs
on the cables (bus
connecting cable and
power cable) between
the SAFe and the MC10
are properly connected.
On the MC10, check
whether 120 V is present
at the "Power SAFe"
terminals.
Check whether the
connecting cables (bus
cable and power cable)
between the SAFe and
the MC10 are damaged.
Check whether the green
indicator lamp on the
SAFe is lit.
Disconnect the bus cable
and check whether the
boiler goes into
emergency mode (runs
up to boiler temperature
of approx. 140 °F
(60 °C)).
Check whether the SAFe
or the MC10 is defective
by replacing them.
If connector is loose,
reconnect properly.
If 120 V is not present,
the MC10 is defective
and must be replaced.
Replace connecting
cable.
If the LED is not lit, the
SAFe is probably
defective and should be
replaced.
If the boiler does not
start up, the SAFe is
defective and must be
replaced.
Replace the SAFe or
MC10.
K
6L
515
Failure of the ionization
signal during operation.
Ionization signal is lost
during burner operation.
-
None; the SAFe will
initiate a restart.
K
6L
514
Flame failure during the
flame stabilization period.
No flame signal was
detected within the
flame stabilization
period.
-
None; the SAFe will
initiate a restart.
V
6C
576
Ionization current > 0.9 μA
during preventilation.
No flame signal was
detected within the
preventilation phase.
Check ionization
electrode.
Make sure that metal
fibers of propane burner
are not in contact with
with electrodes.
Check function of gas
valve.
Check ionization
electrode gap.
Replace ionization
electrode.
Replace gas valve.
Type
1)
Display code Fault code
Cause
Description
Testing sequence/
Cause
Measure
Table 23 Fault displays
1) V = interlocking; B = inhibiting; BC = operating code
