Buderus GB402-320-5, Инструкции по установке и обслуживанию для подрядчиков

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11 Troubleshooting
Logano plus GB402 – 6 720 820 700 (2018/01) 47
11.3 Operating and fault displays
11.3.1 Operating messages of the controller
Display code Sub-code Reason Description: Test procedure/cause Corrective measure
2P 564 Temperature rise at the
boiler sensor too rapid
( > 70 K/min). Heat exchanger protection
due to excessively fast
heat-up speed. No or insufficient heat
draw-off (e.g.
thermostatic valves or
mixers closed). Ensure adequate heat draw-off
Inadequate boiler flow
rate. Install adequately sized pumps.
Pump does not work. Check whether the pump is
being triggered. Replace the
pump if required.
Deposits on the water
side of the boiler (dirt
from the heating system,
scaling). Flush/clean the boiler block on
the heating water side with
agents approved for use with
aluminium.
OA – Appliance in switching
optimisation program. A new burner demand occurs
within the set switching
optimisation time. Appliance
is in standby period. The
standard switching
optimisation time is 10 min. Check output setting on
the BC10 basic controller. Match the boiler output to the
required heat demand of the
building.
Check the control setting
in the RC35 control unit. Match the control setting to the
system conditions.
OH – The appliance is in
standby, there is no heat
demand. The boiler is ready to operate
and has no heat demand from
the heating circuit. – –
OY – The current boiler water
temperature is higher
than the set boiler water
temperature. The current boiler water
temperature is higher than the
set boiler water temperature.
The boiler is shut down.
– –
OP – Waiting for the fan to start
up. The start-up needs to be
detected for the sequence to
continue. – –
OE – The appliance is in
standby, there is an
active heat demand, but
an excess of energy is
being supplied. The current heat demand of
the system is lower than that,
which the minimum
modulation level of the burner
supplies. – –
OU – Start of the program
sequence to start the
burner. – – –
OC – Beginning of burner start. – – –
OL – Opening of the gas valve. – – –
OF – Insufficient flow rate
through the boiler. Temperature differential
between the flow and return
> 15 K.
Temperature differential
between flow and safety
temperature sensor > 15K.
Check the flow
temperature on the
BC10, check the return
temperature with RC35 or
the service key, measure
the resistance of the
boiler sensor (high limit
safety cut-out (STB)) and
compare with the curve. Adjust the setting of the boiler
circulation pump.
Check the surface temperature
of the cast section that is
equipped with the safety
temperature sensor using a
thermometer.
Check whether a cast section is
blocked with dirt.
Table 22 Operating codes