9.
System/equipment faults
Warning
Code
Fault
W20
External safety
chain is interrupted
W21
Max. level reached
in steam cylinder.
W22
Max. fill time
exceeded
(20 minutes).
Error
Code
Fault
---
---
E21
Max. level reached
in steam cylinder
and no power.
E22
Max. fill time
exceeded (more
than 4 hours).
Equipment faults
Cause
Fan lock open.
Flow meter triggered.
Safety hygrostat tripped.
Low conductivity (after commissioning).
Insufficient conductivity for cylinder type.
Phase failure of heating voltage.
Obstructed water supply/shut-off valve
closed/insufficient water pressure.
Blocked or defective inlet valve.
Excessive back pressure in the steam line
(excessive channel pressure, steam line too
long or steam line bent), resulting in a loss of
water pressure via the water cup.
Leakage in the water system.
Remedy
Check/switch on fan.
Check fan/filter in the ventilation system.
Wait, check/replace maximum hygrostat, if
necessary.
Wait until the mineral concentration in the
cylinder water has increased.
Select correct cylinder type.
Check/switch on the service switch in the
power supply line. Check/replace fuses in
the power supply line.
Check water supply (filter, lines, etc.),
check/open shut-off valve, check water
pressure.
Check mesh in inlet valve, clean if
necessary. Replace valve.
Check channel pressure, check steam
installation. If necessary, install the pressure
compensation kit (see options).
Check/seal water system.