Troubleshooting
Control board (
-9N10
) of the humidity
module defective? e.g. with no water in the
steam boiler, after 90 s (time-out) the
buzzer on the control board of the steam
boiler does not sound.
Yes
Replace the humidification
module, chap. 9.1.6)
No
Water pump of steam boiler (
-9M10
)
defective?
Yes
Replace the humidification
module, chap. 9.1.6)
•
The evacuation pump (-8M1) is fre-
quently or continuously running
Max. length of 3 m of the external waste-
water hose exceeded?.
Yes
Check the length of the external waste wa-
ter hose, if appropriate, change the installa-
tion site of the unit to not exceed the max.
admitted hose length.
No
Max. inclination of 1 m of the external
waste-water hose to the drain exceeded?
Yes
Place the waste water hose in another way
or take appropriate measures to guarantee
that the max. inclination of the waste water
hose is not exceeded.
No
Freshwater inlet valve (
-10Y1
) defective?
Yes
Replace the humidification
module, chap. 9.1.6)
No
Filling level and overflow sensor (
-10S1
)
in the inlet tank defective?
With max. level down = switch closed
Yes
Replace the humidification
module, chap. 9.1.6)
Service Manual KBF (E5.2) 04-2015
29
