General Fault With Power Supply; Behaviour Of System After A Power Failure; Extra Cleaning Of Flue Gas Paths - Froling SP Dual compact Operating Instructions Manual

6.2 General fault with power supply

6.2.1 Behaviour of system after a power failure

6.3 Extra cleaning of flue gas paths

Adjust the air duct to the fuel
B1500423_en | Operating instructions Dual fuel boiler SP Dual compact
Error characteristics
Nothing is shown on the display General power failure
No power to the controller
When the power supply has been restored, the boiler returns to the previous mode and is
controlled according to the specified program.
r After a power failure, check whether the STL (high-limit thermostat) has tripped.
r Keep the doors of the boiler closed during and after the power failure, at least
until the induced draught fan automatically starts up again.
EXCEPTION:
If the boiler operating status was "Heating up", "Pre-heating" or "Ignition" before the
power failure, the boiler follows the shutdown procedure and cleaning commences. Only
then does the boiler switch to "Preparation" operating status and the system starts up
again.
Error characteristics
Extra cleaning required due to
very sticky, black deposits in
the flue gas paths
Noticeably shorter cleaning
intervals
Adjust the air duct to optimally burn fuels with a water content less than 15%. The flow of
supply air is optimised using an air volume throttle plate (Froling item no. T244132). The
following steps illustrate assembly.
Caution: Before assembly, switch off the power to the boiler, ensure that it cannot
be switched back on again and allow to cool!
NOTICE! If you have any questions, please contact Froling customer services or
your installer!
Cause of error
Main switch is turned off
FI-protective circuit breaker,
power line protection or SPS
power line protection tripped
Possible cause
Using fuels with a water
content less than 15%
Use of fuels with a water
content above 25%
Troubleshooting | 6
Elimination of error
Turn on the main switch
Switch on the protective circuit
breaker
Elimination of error
Adjust air duct by fitting an air
volume throttle plate
Use fuel with lower water
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