9000-606-89/30 1711V001 25
13 Tips for operators and service technicians
Any repairs above and beyond routine maintenance must only be carried out by suitably quali-
fied personnel or by one of our service technicians�
WARNING
Infection due to contaminated unit
i Clean and disinfect the suction before working on the unit�
i Wear protective equipment when working (e�g� impermeable gloves, protective goggles
and mouth and nose protection)�
Prior to working on the device or in case of danger, disconnect it from the mains (e�g� pull the
mains plug)�
Fault Probable cause Solution
Device does not start No mains voltage i Check the mains supply voltage�
*
i Check the fuses and replace if
necessary� *
Undervoltage i Measure the supply voltage; call
an electrician if necessary� *
Motor protection switch set too
low
i Measure current, set the motor
protection switch to the meas-
ured value plus safety margin� *
Motor protection switch defective i Check the motor protection
switch; replace if defective� *
Capacitor defective i Measure capacitance and
replace if necessary� *
Turbine is blocked by solid parti-
cles or sticky soiling
i Disassemble the unit and clean
the turbine� *
The unit generates unusu-
al noises
Solid particles in the turbine
chamber
i Disassemble the unit and clean
the turbine and housing� *
Water leaking from the ex-
haust air connection
Foam in turbine due to use of in-
correct cleaning and disinfectant
agents
i Use non-foaming cleaning and
disinfectant agents�
Build-up of condensate in the ex-
haust air line
i Check the pipe system; avoid
over-cooling� *
Troubleshooting
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