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6.1 The humidifier produces insufficient
or no steam
The following causes are possible:
When a fault occurs, the problem is often sought only on the humidifier,
though the fault may have been caused by a problem in the plant.
For successful trouble-shooting, some knowledge of plant technology
(air-conditioning, controls) is necessary.
You should proceed in the following order:
• Observe
• Work out the problem
• Take action
• The steam cylinder is new and merely in the start-up phase
• The humidistat/humidity controller is not demanding any humidity
• A safety element, such as a maximum humidistat etc., is not allowing
humidification to take place
• The safety link between terminals L1 and H has not been made
(if a proportional adaptor is used)
• The heating power is off or the electrode plugs have not been inserted
• There is no water in the steam cylinder because the water supply has
been interrupted (e.g. stop cock is closed etc.)
• The filter or the nozzle in the inlet valve is blocked or damaged
• An output limitation has been set
• The cylinder needs replacing
• The humidifier is too small for the job
• The current transformer is either defective or not connected correctly
• The contactor coil is defective
• The steam hose is blocked or has a kink in it
6. Rectifying faults
