Question about DeLonghi DE500 Dehumidifier

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Thanks OK.The problem then seems to be that when I select the dehumidifier mode, the fan does not shut off. Must be a fault in the circuit?

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  • de500 Sep 03, 2008

    Ok - sounds right. I suppose there's not much that can be done to stop the fan and still run the dehumidifcation.



    Thanks very much for your help Mike. Is very useful, even for validation!

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I went back and rechecked. If the fan mode is selected, you can only set the fan at one of the three speeds. If you leave it in the fan mode, the dehumidifier will not come on.

Once the fan speed is selected, it will run at that speed in the dehumidifier mode. The fan will keep running, even when the dehumidifier (compressor) shuts down.

The only way to get it to turn off is to use the clock setting, which either selects how long it stands-by before starting , or how long it will run before going back to stand-by. DeLonghi calls it "stand-by," we would call it "off." DeLonghi calls unplugged "off."

I've never turned mine to stand-by, because it will never get my entire house down to 30% humidity (I have it where my air handler returns air to the basement). I live in the greater DC Metro area, where 75% humidity is considered extremely dry.

Apparently the normal mode of operation is fan on unless awaiting a clock start, or encountering a clock shut-down; either condition puts it into the "stand-by" mode.

Posted on Sep 03, 2008

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Sorry to read about your problem, I hope this helps you out.

Their has to be a model difference issue . I have checked the Manuel and have put a copy of the section, for modes. and their is no heat only mode.

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Default Setting:

When the unit is first connected to a power supply, the electronic circuit board will automatically default to the following factory settings;
Mode: Dehumidifier Humidity Set Air Value:60% RH Fan Speed: = Low

NOTE: In the event of a power failure or the unit is switched 'Off', the most recent settings are retained and restored once the power is switched "On"/resumed.
IMPORTANT NOTE: Depending on the ambient humidity conditions, when power is restored or switched 'On' the dehumidifier may not start automatically under the factory or custom (see page 7) default setting. This is an indica- tion that the ambient RH% level of the surrounding envi- ronment is lower than the current default setting and it may be necessary to select a lower set RH% value.
DRY MODE SELECTION: 1. The unit does not have to be switched on (opera- tional) to select/set a program. All programs can be selected with the unit in the "off" position.
2. Press the MODE button until the Dry symbol is shown in the mode area of the display. Note: Each time the MODE button is pressed, the setting will alternate between DRY (dehumidifier) and FAN (only) mode.

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