Nordmann Engineering AT4 D - Electrode Current and Foam Faults; Electrode Current and Foam Detection Issues; Cylinder Service and Maintenance Warnings

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Warning Error Cause Remedy
LED Display LED Display
No electrode current for more than
20 minutes
No electrode current for more than
4 hours
–––
Warning
W23: No Current
red
lights
Error
E23: No Current
Phase failure heating voltage. Inspect/turn on service switch of the mains
supply line. Inspect the fuses of the mains
supply, replace if necessary. Check/repalce
main contactor.
Water supply obstructed/shut-off valve
closed/water pressure too low.
Inspect water supply (lter, water piping,
etc.), check/open shut-off valve, check water
pressure.
Inlet valve blocked or defective. Inspect strainer insert of the inlet valve, if
applicable clean strainer insert or replace
inlet valve.
Excessive back pressure in the steam line
(pressure in steam bath cabin too high, steam
line too long or kinked), causing water loss
via lling cup.
Check pressure in steam bath cabin, inspect
steam installation.
Leakage in the water system. Inspect water system and seal if necessary.
Electrode current in relation to the
steam demand too high
Electrode current in relation to the
steam demand too high
–––
Warning
W24: Over Current
red
lights
Error
E24: Over Current
Humidity demand has decreased too fast. Automatic adaptation of the operating
point.
Drain pump defective. Inspect drain pump, replace if necessary.
Drain in steam cylinder blocked. Replace steam cylinder.
Water conductivity too high for the selected
steam cylinder type.
Select correct steam cylinder type.
Max. admissible electrode
current exceeded
Max. admissible electrode
current exceeded
–––
Warning
W25: Excess Current
red
lights
Error
E25: Excess Current
Drain pump defective. Inspect drain pump, replace if necessary.
Drain in steam cylinder blocked. Replace the steam cylinder.
Water conductivity too high for the selected
steam cylinder type.
Select correct steam cylinder type.
Relay heating voltage jammed
––– ––– red
lights
Error
E26: Req.Off Current
Relay heating voltage jammed in activated
position.
Inspect relay, replace if necessary.
Foam detection Foam detection (4 automatic drain-
ings within 24 hours)
–––
Warning
W27: Foam
red
lights
Error
E27: Foam
Foaming in steam cylinder. Drain steam cylinder via drain key (sev-
eral times, if necessary). Check quality of
the supply water.
Steam cylinder needs service Service interval for
steam cylinder exceeded
yellow
lights
Warning
W28: Cyl. Maintenance
red and
yellow
ash
Error
E28: Cyl. Maintenance
Mineral deposits and/or electrodes spent. Replace steam cylinder.
Important: After replacement of the steam
cylinder, reset the maintenance counter
(see chapter 6.6).
Steam cylinder needs service Max. operating hours of the steam
cylinder reached
yellow
lights
Warning
W29: Cyl. Maintenance
red and
yellow
ash
Error
E29: Cyl. Maintenance
Maximum operating hours of the steam
cylinder reached.
Replace steam cylinder.
Important: After replacement of the steam
cylinder, reset the maintenance counter
(see chapter 6.6).