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© STULZ GmbH – all rights reserved EN/03.2016
steam humidifier iNstruCtiONs
11.1.4 Fault elimination
11.1.4.1 Fault indication
LeD on control unit eCCM/S
Description
yellow
red
blinks permanently
–––
Drain/info key has been pressed shortly (manual draining in progress)
lights
–––
Steam cylinder maintenance due or maintenance indication not reset.
lights
lights
Steam cylinder maintenance not executed or maintenance indication not reset.
–––
lights
Fatal malfunction.
If the yellow or red LED lights, press drain/info key (at least 3 seconds) until yellow (“Warning”) or red (“Error”)
LED starts blinking intermittently (info mode). The amount of “blinks” per interval indicates the type of
malfunction.
– Yellow LED “Warning” blinks intermittently
A malfunction is present. The control unit checks whether there is a temporary problem (e.g. water supply
interrupted for a short time) or whether it can resolve the problem by taking necessary measures.
– Red LED “Error” blinks intermittently
The control unit, after several attempts, fails to solve the problem (number of attempts depends on the type of
malfunction) or the problem obstructs further operation. In this case the heating voltage is interrupted via the
main contactor.
11.1.4.2 Resetting the maintenance indication
Important! Most operational malfunctions are not caused by faulty equipment but rather by improper installa-
tion or disregarding of planning guidelines. Therefore, a complete fault diagnosis always involves a thorough
examination of the entire system. Often, the steam hose connection has not been properly executed, or the
fault lies with the humidity control system.
After completing maintenance work, the maintenance indication (yellow LED) must be reset as follows:
• De-energize the humidifier board.
• Press drain key and keep pressed.
• Switch on humidifier board.
• Keep drain key pressed until the system test is completed (approx. 10 seconds).
