Fault reports and their elimination
© Solarbayer GmbH [210105]
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FAULT REPORTS AND THEIR ELIMINATION
Always observe the safety instructions!
In the case of all faults that are detected, the fault must first be rectified and then acknowledged by switching
it on again. If several errors appear at the same time, they are displayed in the order in which they happened.
Error message on the
display
Sum
fault /
alarm
Possible reason?
Proposals for repair
Failure 01
F:Check sum
X
Check sum isn´t correct
Change control unit
Failure 02
F:
Comparison data
HZS 621/622
X
Comparison data not correct
Change control unit
Failure 03
F:
Comparison data HZS
631
X
Comparison data not correct
Change control unit
Failure 04
F:STL
X
Mains voltage faulty
Safety temperature limiter
(STL) has activated
Allow system to cool down and
confirm STL
Failure 05
F:Boiler sensor
X
Sensor break boiler temperature Change the boiler sensor
Failure 06
F:CAN-fault
X
Fault during transmission via
CAN bus
Check CAN connection (wiring)
Failure 07
F:EEProm
X
Fault when writing / reading on
EEProm
Change control unit
Failure 08
F:Stack HZS 621/622
X
Overflow from stack pointer
Change control unit
Failure 09
F:Stack HZS 631
X
Overflow from stack pointer
Change control unit
Failure 10
F:Exhaust temperature
X
Sensor
break
exhaust
temperature PT1000
Change the exhaust temperature
sensor
Failure 11
F:Lambda calibration
X
Lambda calibration error
lambda value outside defined
range
Carry out calibration again or
change lambda sensor.
Failure 12
F:Speed feedback
X
Fault in speed monitoring of
exhaust blower
Wrong impulse number
Check exhaust blower or speed
feedback
Failure 13
Door contact
-One door is open
-
Door contact screws
incorrectly adjusted
-Door contact switch defective
Only information – NO FAILURE
-Close the door
-
Re-adjust door contact screws
-Change the door contact switch
Failure 14
F:Ready
Boiler
temperature
overt
Boilermax (90°C)
Boiler loaded with too much
wood (faulty operation)
Return pump or return mixer
defective
Buffer storage too small
designed
Insert less wood
Change the return pump or
return mixer.
Increase buffer volume
Failure 15
F:Lambda sensor
X
Lambda sensor is defective or
disconnected
Change the lambda sensor or
check the clamping.
Failure 16:
F:Return flow sensor
X
Sensor
break
return
flow
temperature
Change return flow temperature
sensor
