6.7.2 What, if..?
Most operational malfunctions are not caused by faulty equipment but rather by improper installation or
disregardingofplanningguidelines.Therefore,acompletefaultdiagnosisalwaysinvolvesathorough
examinationoftheentiresystem.Often,thesteamhoseconnectionhasnotbeenproperlyexecuted,
orthefaultlieswiththehumiditycontrolsystem.
Thefollowingtablegivesalistofpossiblemalfunctions,theappropriatealarmorerrormessage,details
oftheircause,andnotesonhowtodealwitheachproblem.
Malfunction/Indication Cause Remedy
Min. lling time not reached
Error code: 1A/1B
Waterfeedtosteamcylinderheavilycalcied.
Level in steam cylinder and level unit do not
match.
Carry out major servicing.
Internal safety chain
interrupted
Error code: 2A/2B
Connection to over-temperature switch on steam
cylinder broken or over-temperature switch
faulty.
Steam cylinder overheating, over-temperature
switch has responded.
Flat-band cable between control and power
board interrupted or not connected.
Check connections or replace over-temperature
switch.
Inspect steam cylinder, clean if necessary.
replace over-temperature switch.
Inspect connections, connect or replace at-
band cable.
Max. lling time exceeded
(alarm message only)
Error code: 3A/3B
Waterfeedblocked(mainwatertapclosed,lter
valve closed or blocked).
Water pressure too low.
Inletvalvedoesnotopen,ltersievein Inlet
valveblockedorinletvalvefaulty.
Feedhosesintosteamhumidiernotconnected
or kinked.
Level unit not connected
Float in the level unit sticking or level unit
faulty.
Checkwaterfeed(openmainwatertap,open
orcleanltervalve.
Raise water pressure (range 1-10 bar).
InspectelectricalconnectionsandfuseF2on
supply module. Clean lter sieve or replace
Inlet valve.
InspecthosesintoUnitandconnectifnecessary.
Replace Faulty Hoses.
Connect level unit.
Clean or replace level unit.
Max. vaporization time
exceeded
Error code: 4A/4B
Individualheatingelementsfaulty.
Fusesonthepowerboardfaulty.
Mainsvoltagetooloworfailureofaphase(L1,
L2 or L3).
Steam lead too long or not insulated.
This error may also occur upon a cold start.
Replacefaultyheatingelements.
Replacefusesonpowerboard.
Check mains voltage and connections.
Maintain maximum lead lengths (max. 4 m),
Insulate steam lead.
EnableSoftstart(seechapter6.5).
Alarm 1A
filling time
Error 1A
filling time
Alarm 2A
safety chain int
Error 2A
safety chain int
Alarm 3A
water supply
Alarm 4A
steam time
Error 4A
steam time