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EN/04.2021 © STULZ GmbH – all rights reserved
steam humidifier iNstruCtiONs
11.1.4.3 Notes on fault elimination
DANGEr
Danger of electric hazard
The steam humidifier OEM2 is operated with mains voltage. One may get in touch with live
parts when the unit is open. Touching live parts may cause severe injury or danger to life.
• For the elimination of faults set the steam humidifier out of operation as described in chap
-
ter 11.1.3.5, separate the unit from the mains (test with voltage tester) and secure it against
inadvertent power-up.
11.1.4.4 Malfunction lists
“Warning”
yellow LED blinks
“Error”
red LED blinks
cause
remedy
1x
Control board defec
-
tive
---
Control board defective
Please contact your unit supplier.
2x
Max. filling level
of steam cylinder
reached
---
Water conductivity too low (after initial
operation).
Water conductivity too low for type of steam
cylinder.
Phase failure heating voltage.
Wait.
Select correct steam cylinder type.
Check mains fuse(s) and replace if applicable.
3x
Permissible filling
time exceeded for
more than 20 minutes
(first automatic clea
-
ning cycle)
3x
Permissible filling
time exceeded for
more than
220 minutes.
Phase failure heating voltage.
Water supply obstructed, water pressure too
low, inlet valve defective.
Excessive steam back pressure, causing
water loss via filling cup.
Drain valve is leaking.
Check mains fuse(s) and replace if applicable.
Open shut-off valve in the water supply pipe, clean
water inlet filter, check water pressure, inspect/
replace inlet valve.
Inspect steam installation.
Clean/replace drain valve.
notice
If the Jumper “L” is removed from the ECCM/S control unit, the unit automatically triggers an error without prior
warning if the admissible filling time has been exceeded for more than 20 minutes (red LED lights and the error
switch on the control unit ECCM/S is activated). However the unit switches off after 220 minutes of filling time
exceeding (see chapter 11.1.1.3).
4x
Steam cylinder
needs servicing
4x
Interval for steam
cylinder service
exceeded for more
than 72 hours
Interval for steam cylinder service
exceeded.
Mineral deposits and/or electrodes
spent.
Replace steam cylinder type A, clean steam
cylinder type D (see chapter 5, humidifier ser
-
vice manual).
Important! Refer to chapter 11.1.4.2 for reset
-
ting the maintenance indicator.
notice
If the Jumper “K” is installed on the ECCM/S control unit, the unit remains in warning status even if the interval time
has been exceeded for more than 72 hours. No error is triggered (red LED does not light) and the error switch on the
control unit ECCM/S is not activated (see chapter 11.1.1.3).
6x
Electrode current
too high
6x
Electrode current
too high
Steam cylinder (electrodes) defective.
Faulty auto-drain function.
Faulty drain valve/coil.
Steam cylinder outlet obstructed.
Water conductivity too high for type of
steam cylinder.
Replace steam cylinder or electrodes.
Inspect installation/control system.
Replace drain valve/coil.
Clean/replace steam cylinder.
Select correct steam cylinder type.
