Troubleshooting
Fault localization
Humidification module variant B
In spite of correct handling, no
steam enters the inner chamber
Humidity switch (
-8S1
) defective?
Yes
Replace humidity switch (chap. 8.4)
No
The humidification module itself has extensive features for error detection.
Please see the messages in the controller display and the LEDs on the control board of the
humidification module.
On the controller display the error number can be derived from the indication “HUMID SYSTEM” following a
first reset: number of flashes (1s ON / 1s OFF) with a pause of 5 seconds at the end.
The meaning of the error numbers is shown in the table below.
N
um
ber
of
fl
as
hes
Warning messages and error messages indicated by flashing
of the “HUMID SYSTEM” indication in the controller display
Description
Cause / Action
1
Drain Reminder
1)
Threshold for performing a
purging is exceeded.
• Start purging by switching off/on the
humidification module.
→ After successful purging the display is
resetted automatically
2
Service Reminder
1)
Threshold for performing a maintenance of
the humidification module is exceeded.
• Perform maintenance
3
Initial Fill Timeout
State10
4)
In the operating mode "refilling" the neces-
sary level in the boiler cannot be achieved
within 15 minutes.
→ Check the water supply.
• Inlet valve defective / no water
• Upper float switch of the boiler defective
• Steam valve defective / does not open
• Leakage / water loss / drain valve does not
close
4
Refill Timeout
State 40
4)
In the operating mode "Normal Operation"
the necessary level in the boiler could not
be held.
→ Check the water supply.
• Inlet valve defective / no water
• Upper float switch of the boiler defective
• Leakage / water loss / drain valve does not
close
5
Cylinder Level
Void
4)
Upper level float in the boiler shows ok alt-
hough the lower float indicating low level.
→ Illegal switching combination of the
float switch in the cylinder
• Upper float switch of the boiler defective
• Lower float switch of the boiler defective
32
Service Manual KBF (E5.2) 04-2015