Fault reports and their elimination
72
© Solarbayer GmbH [210205]
Error message on the
display
Sum
fault /
alarm
Possible reason?
Proposals for repair
Failure 17
F:Return flow boost
X
Return flow setpoint temperature
could not be reached in
operation
Check RL boost
Failure 18
F:Buffer top
X
Sensor break buffer temperature
top
Change sensor break buffer
temperature top
Failure 19
F:Buffer bottom
X
Sensor break buffer temperature
bottom
Change sensor break buffer
temperature bottom
Failure 21
F:Heating
X
The boiler has not reached the
exhaust gas temperature level
within the specified time when it
burns on.
Too rough material used
Too wet wood used
Brennplattenlöcher verstopft
Kleineres Holz verwenden
Trockenes Holz verwenden
Brennplattenlöcher reinigen
Failure 22
F:Reheating
X
Kessel hat beim Nachheizen
innerhalb der vorgeschriebenen
Zeit
die
Abgastemperatur-
schwelle nicht erreicht
Zu grobes Material verwendet
Zu feuchtes Holz verwendet
Fire plate holes blocked up
Use smaller wood
Use dry wood
Clean burner plate holes
Failure 23
F:WTR-monitoring
X
Fault during WTR monitoring
WTR out of function
Check the heat exchanger
tubes for dirt and possibly
manual cleaning (see chapter
10 page 44)
Checking the WTR motor or
limit switch
Failure 24
F:Overtemperature
Overtemperature!
Boiler¬-
temperature above BoilerMax
Fuel values set with too high
power
BoilerMax set too high
Return pump or return mixer
defective
Correct fuel values
Set down BoilerMax
Change return pump or return
mixer
Failure 25
F:Frost protection
Frost protection mode
Only information – NO FAILURE
Failure 26
F:Blocking protection
Blocking protection mode
Only information – NO FAILURE
Failure 27
F:Cleaning !!!
The system has passed 1000
operating hours.
Clean (clean heat exchanger -
see chapter 10 page 44)
Acknowledge fault:
1 Boiler must be in the OFF
condition (1)
2 Press and hold the ON/OFF
button (to start the boiler)
