Herz firestar Lambda 18 - Page 27

Fault reports and their correction
10
Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 27
Fault reporting on the
display
Comp-
osite
error/
Alarm
Possible cause?
Suggestions for rectifying
Fault 17
F:Backflow Parameter
X
Return flow target temperature
could not be reached during
operation
Check return flow bypass
Fault 18
F:Buffer-lower
X
Broken sensor for lower buffer
temperature
Lower buffer temperature –
replace sensor
Fault 19
F:Buffer-top
X
Broken sensor for top buffer
temperature
Top buffer temperature – renew
sensor
Fault 21
F:Lighting up
X
At lighting up the boiler has not
reached the flue temperature
threshold in the prescribed time
 Too coarse material used
 Too moist wood used
 Burner plate holes blocked
 Use kindling
 Use dry wood
 Clean burner plate holes
Fault 22
F:Re-heating
X
At lighting up the boiler has not
reached the flue temperature
threshold in the prescribed time
 Too coarse material used
 Too moist wood used
 Burner plate holes blocked
 Use kindling
 Use dry wood
 Clean burner plate holes
Fault 23
F:HEC-Monitoring
X
 Fault with HEC monitoring
 Check the heat exchanger
pipes. Clean manually in case
of soiling (see chapter 6 page
13)
 Check HEC-Motor and limit
switch
Fault 24
F:Excess temperature
Excess temperature!
Boiler temperature above boiler
maximum:
 Flow parameters set at too
high capacity
 Boiler maximum set too high
 Defective return flow pump or
return flow mixer
 Buffer storage designed too
small
 Correct the fuel values
 Boiler maximum set too high
Replace return flow pump or
return flow mixer
Fault 25
F:Frost protection
Frost protection mode
Information only – no error
Fault 26
F:Block protection
Blocking protection is carried out
Information only – no error
Fault 27
F:CLEANING !!!
The installation has exceeded
1000 operation hours!
 Process maintenance (Clean
heat exchanger – see chapter
6 page 13)
To acknowledge this fault press
1 Press the On-/Off-button
while the
2 Installation is in condition
UNIT OFF (1)