Operating And Error Messages; Operating Messages - Buderus LOGANO PLUS GB312 Installation Instructions Manual

10.2 Operating and error messages

10.2.1 Operating messages

Display Event
1)
Type code code
2P 564
BC OA -
BC OH -
BC OY -
BC OP -
BC OE -
BC OU -
BC OC -
BC OL -
Table 21 Operating codes 1) V = locking; B = inhibiting; BC = operating code
Logano plus GB312 – 6 720 647 367 (2012/11)
Cause Description
Boiler sensor Heat exchanger cut-out
temperature gradient due to excessive rate of
too steep ( >126°F/ temperature rise.
min; >70°K/min).
Appliance is in A new burner demand
optimized switching occurs within the set
mode. switching optimization
time. Appliance is in anti-
cycle phase. The standard
optimized switching
period is 10 min.
The appliance is in The boiler is on standby
standby mode; no and there is no call for heat
heat demand present. from the heating system.
The current boiler The current boiler water
water temperature is temperature is higher than
higher than the set the set boiler water
boiler water temperature.
temperature.
The boiler is shut down.
Waiting for fan to start Start-up of the fan has to
up. be detected before the
sequence can be
continued.
The appliance is in The current heat demand
standby mode, heat from the system is lower
demand is present than that supplied by the
but too much heat is minimum burner
being delivered. modulation setting.
Beginning of -
sequence for starting
up burner.
Beginning of burner -
start-up.
Gas valve opening. -
Troubleshooting
Test procedure/cause
Little or no heat draw (e.g.
thermostatic valves and mixer
closed).
Boiler flow rate too small.
Circulation pump not working.
Circulation pump fitted
opposite way round to
intended direction of flow.
Deposits in water carrying
parts of boiler (dirt from
heating system, limescale).
Check output setting on BC10
basic control unit.
Check control setting on RC35
programming unit.
-
-
-
-
-
-
-
10
Measure
Ensure adequate heat
transfer.
Fit adequately
dimensioned pumps.
Check whether pump is
being activated. Replace
pump if necessary.
Fit pump correct way
round.
Flush/clean water side of
boiler heat exchanger with
agents suitable and
approved for aluminum
Adjust boiler output to
required heat demand for
building.
Adjust control setting to
system conditions.
-
-
-
-
-
-
-
53