Operating instructions

38
7.4 What, if...?
ThefollowingtablelistssymptomsofmalfunctionthatmayoccurindailyoperationoftheDefensor
PH28/PH28A, together with possible causes and suggested remedies.
Symptom Cause Remedy
Unit does not work, LC display
remains dark
Unit is not connected to the mains. Connect unit to the mains.
Unitfuseblown. Have a service technician of
your Defensor supplier check
the unit.
Unit does not humidify. Humidierdrumdoesnotturn.
Humidierdrumnotcorrectly
installed.
Correctlyinstallhumidierdrum.
Gearwheelofthehumidierdrum
must engage in the driving gear
wheel.
Ambient air humidity is higher
thanselectedreferencevalue.
Noremedyrequired,changeref-
erence humidity value if neces-
sary.
Levelswitchisdefective.There-
forenoerrormessageisdisplayed
even though the water level in the
base tub is too low.
Haveaservicetechnicianofyour
Defensor supplier replace the
level switch
Room air does not reach the
set reference humidity value.
Evaporator mat not installed. Install evaporator mat.
Room temperature too high. Reduce room temperature to 20-
22°C.
Unit very dirty. Performmaintenance(see
chapter 6)
Doors or windows are open. Close doors and windows.
Prolongedventilationoftheroom.
Therefore continuous replace-
mentofthe humidiedroomair
by dry outdoor air.
Ventilateroomonlyashorttime!
Room to large. ContactyourDefensorsupplier.
Actual humidity much higher
than the reference value.
The actual humidity is higher than
thesetreferenceairhumidity.
Letunitrunningasairpurier.
Fan does not run Humidicationmode“Humidica-
tion” selected. Ambient humidity
ishigherthanselectedreference
value.
None. Unit is working properly.
Unit is in program mode. The cur-
rentlyactiveprogramsetsthefan
step to “0”.
None. Unit is working properly.
Fandefective. ContactyourDefensorsupplier.
Basetuband rotaryhumidi-
cation drum have heavy slime
accumulation.
Silver coating on the water ionisa-
tion electrodes is worn.
Haveaservicetechnicianof
yourDefensorsupplierreplace
the water ionisation electrodes.