Defrosting; Safety Circuit; Compressor Control; Maintenance - Dantherm CDF 10 Manual

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NOTE! If the air humidity is below 50%RH, the unit will not

start when the power is connected.

4.3 Defrosting

If the temperature falls to below 20ºC the evaporator may start to ice up after a short time.

The defrosting function is activated when the evaporator sensor registers a temperature lower than 5ºC, after which

the control will let the unit operate in dehumidification mode for another 30 minutes. Then the compressor is

stopped and the unit switches over to active defrosting, which means that the cooling circuit turns and the hot

refrigerant runs through the evaporator coil and melts the ice. When the evaporator sensor registers that the

temperature is above 5ºC, the compressor starts again.

If the temperature in the dehumidifier increases to a temperature of more than 55ºC (for example in case of fan

failure), the compressor stops automatically to avoid damaging it. After 45 minutes the compressor starts again

automatically.

By room temperatures outside the unit's working range (3 - 32°C) it is automatically switched off to protect the

evaporator coil from icing up and the condenser coil from overheating. The unit will automatically start again when

the room temperature is within the working range.

The number of compressor starting is limited by a 6 minutes timer, which starts up when switching on the

compressor. The timer must have come to an end before the compressor can be switched on again.

Each time the unit has been switched off on the main switch, by the built-in hygrostat, or by an external hygrostat,

it will take 30 seconds before the unit can be switched on again. This is a safety function protecting the compressor

against overloading caused by too high pressure in the cooling circuit at start up.

The dehumidifier requires very little attention for trouble free running. All the necessary safety and control

functions have been built in. The fan motor and the compressor have permanent lubrication and require no

particular maintenance.

Once a month the air inlet filter should be checked and cleaned if necessary. The front cover panel is removed and

the filter taken out. Clean the filter in tepid soapy water or if not badly soiled by vacuum cleaning.

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