Nordmann Engineering AT4 D - Unit Specific Faults; Humidifier, Temperature, and Filling Time Faults

68
Warning Error Cause Remedy
LED Display LED Display
Humidier missing
–––
Warning
W17: Unit Missing
Note: This warning is shown
only on the remote terminal.
––– ––– The optional remote terminal does not
have connection to one or more units.
Check connecting cable. Check/correctly set
Modbus settings (modbus address, interface
parameters).
Temperature measurement instable
––– ––– red
lights
Error
E18: Temperat.Instab.
Instable temperature measurement due to
a manipulation at the temperature sensor
in the steam bath cabin.
Check temperature sensor in the steam
bath cabin.
7.2.2 Unit faults
Warning Error Cause Remedy
LED Display LED Display
Maximum temperature switch
has triggered
––– ––– red
lights
Error
E20: Temp.Fuse
Maximum temperature switch has
triggered
Check temperature in the steam bath
cabin.
Maximum temperature switch defective or
not connected.
Check/replace maximum temperature switch
or correctly connect the switch.
Max. lling level of
steam cylinder reached
Max. lling level of steam cylinder
reached but no heating current for
more than 30 minutes
–––
Warning
W21: Cyl.Max.Level
red
lights
Error
E21: Cyl.Max.&NoCurr
Water conductivity too low (after initial op-
eration).
Wait until the mineral content of the cylinder
has increased
Water conductivity too low for the selected
steam cylinder type.
Select correct steam cylinder type.
Phase failure heating voltage. Check service switch in the mains supply
line and switch on if applicable. Check mains
fuse(s) and replace if applicable.
Permissible lling time exceeded
(20 minutes)
Permissible lling time exceeded
(more than 4 hours)
–––
Warning
W22: Max. Filltime
red
lights
Error
E22: Max. Filltime
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 in 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.