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Max.-Level Fault
Unit shuts off au-
tomatically.
• Solenoid valve does not close properly.
Water level in the cylinder rises slowly
even though the solenoid valve has not
been activated.
• Check solenoid valve.
X
• Water is supplied even thoough the
steam humidifier is switched off. Solenoid
valve remains open.
• Clean solenoid valve.
• Inlet solenoid valve is receiving a con-
stant electric signal. (If the unit is turned
off, water feeding stops.)
• The relay on the main PCB has
stuck. Measure voltage at PBC-
terminal 10 against 15.
• Large amounts of deposits are interfering
with and disrupting the blow-down cycle.
Due to extra water entering the flushing
mechanism, the max.-level is reached
during the blow-down process.
• Clean humidifier, drain assem-
bly and hose to the control cylin-
der.
X
Message Cylin-
der Full
•
•
•
Nominal current or nominal output not
reached although cylinder filled up to
maximum-limitations electrode. Water
imput is interrupted. Possible causes:
- Water conductivity too low.
- Cold start
- Re-start following full blow-down.
- Changing water conductivity.
- Electrodes worn out.
Unit requires maintenance.
No electrode supply cable fed through
current transducer ring.
•
•
•
•
•
Continous steam production
and increasing water conductiv-
ity can cause the control lamp to
switch off automatically after a
period of operation time. nomi-
nal output is reached automati-
cally.
Check water values and/or con-
tact HygroMatik.
Replace electrodes.
See Service section in unit
handbook.
Feed a cable through current
transducer ring.
X X System failure • Mainboard is defective • Check mainboard. If neccessary
- change mainboard
LED
Display
HE ***
ESH***
Message / Mal-
function Dis-
played*
Probable Cause Resolution
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